Java 文件傳輸助手的實現(xiàn)(單機版)

更新時間：2020年05月06日 14:53:52 作者：360°順滑

這篇文章主要介紹了Java 文件傳輸助手的實現(xiàn)(單機版)，文中通過示例代碼介紹的非常詳細(xì)，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值，需要的朋友們下面隨著小編來一起學(xué)習(xí)學(xué)習(xí)吧

項目介紹

用 Java 實現(xiàn)單機版的文件傳輸助手項目。

涉及技術(shù)知識：

Swing 組件
I/O流
正則表達(dá)式
Java 事務(wù)處理機制

基礎(chǔ)功能：

登錄、注冊
發(fā)送文字
發(fā)送圖片、文件
文字、圖片、文件的信息記錄
歷史記錄的保存、回顯及清空
信息發(fā)送的日期
退出

高級功能：

發(fā)送表情包
查看和查找歷史記錄
點擊歷史記錄的文件圖片能直接打開
拖拽輸入信息、圖片、文件

功能總覽：

功能實現(xiàn)

一、登錄

進(jìn)入登錄界面

未輸入賬號，登錄彈出提示

輸入賬號，但未輸入密碼登錄時彈出提示

賬號或者密碼輸入錯誤登錄時彈出提示

登錄成功時進(jìn)入主界面

登錄界面：

package frame;

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import function.Login;

/**
 * 文件傳輸助手登陸界面
 * 
 * @author：360°順滑
 * 
 * @date：2020/04/27
 * 
 */

public class LoginFrame {

	public static JFrame loginJFrame;
	public static JLabel userNameLabel;
	public static JTextField userNameTextField;
	public static JLabel passwordLabel;
	public static JPasswordField passwordField;
	public static JButton loginButton;
	public static JButton registerButton;

	public static void main(String[] args) {

		// 創(chuàng)建窗體
		loginJFrame = new JFrame("文件傳輸助手");
		loginJFrame.setSize(500, 300);
		loginJFrame.setLocationRelativeTo(null);
		loginJFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		ImageIcon image = new ImageIcon("src/pictures/logo.png");
		loginJFrame.setIconImage(image.getImage());
		loginJFrame.setResizable(false);

		// 創(chuàng)建內(nèi)容面板
		Container container = loginJFrame.getContentPane();
		container.setLayout(null);

		// 創(chuàng)建“賬號”標(biāo)簽
		userNameLabel = new JLabel("賬號：");
		userNameLabel.setFont(new Font("行楷", Font.BOLD, 25));
		userNameLabel.setBounds(60, 25, 100, 100);
		container.add(userNameLabel);

		// 創(chuàng)建輸入賬號文本框
		userNameTextField = new JTextField();
		userNameTextField.setFont(new Font("黑體", Font.PLAIN, 23));
		userNameTextField.setBounds(133, 61, 280, 33);
		container.add(userNameTextField);

		// 創(chuàng)建“密碼”標(biāo)簽
		passwordLabel = new JLabel("密碼：");
		passwordLabel.setFont(new Font("行楷", Font.BOLD, 25));
		passwordLabel.setBounds(60, 90, 100, 100);
		container.add(passwordLabel);

		// 創(chuàng)建輸入密碼文本框
		passwordField = new JPasswordField();
		passwordField.setBounds(133, 127, 280, 33);
		passwordField.setFont(new Font("Arial", Font.BOLD, 23));
		container.add(passwordField);

		// 創(chuàng)建登錄按鈕
		loginButton = new JButton("登錄");
		loginButton.setBounds(170, 185, 70, 40);
		loginButton.setFont(new Font("微軟雅黑", 1, 18));
		loginButton.setBackground(Color.WHITE);
		loginButton.setFocusPainted(false);
		loginButton.setBorderPainted(false);

		container.add(loginButton);

		// 創(chuàng)建注冊按鈕
		registerButton = new JButton("注冊");
		registerButton.setBounds(282, 185, 70, 40);
		registerButton.setFont(new Font("微軟雅黑", 1, 18));
		registerButton.setBackground(Color.WHITE);
		registerButton.setFocusPainted(false);
		registerButton.setBorderPainted(false);
		container.add(registerButton);

		// 顯示窗體
		loginJFrame.setVisible(true);

		addListen();
	}

	// 為按鈕添加監(jiān)聽器
	public static void addListen() {

		// 為登錄按鈕添加監(jiān)聽事件
		loginButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				// 創(chuàng)建Login對象并把LoginFrame的文本框內(nèi)容作為參數(shù)傳過去
				Login login = new Login(userNameTextField, passwordField);

				// 判斷是否符合登錄成功的條件
				if (login.isEmptyUserName()) {
					emptyUserName(loginJFrame);
				} else {
					if (login.isEmptyPassword()) {
						emptyPasswordJDialog(loginJFrame);
					} else {
						if (login.queryInformation()) {
							loginJFrame.dispose();
							MainFrame mainFrame = new MainFrame(userNameTextField.getText());
							mainFrame.init();
						} else {
							failedLoginJDialog(loginJFrame);
						}
					}
				}
			}
		});

		// 為注冊按鈕添加監(jiān)聽事件
		registerButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub

				// 隱藏當(dāng)前登錄窗口
				loginJFrame.setVisible(false);

				// 打開注冊窗口
				new RegisterFrame().init();
			}
		});

	}

	/*
	 * 由于各個標(biāo)簽長度不同，所以為了界面美觀，就寫了三個彈出對話框而不是一個！
	 * 
	 */

	// 未輸入賬號時彈出提示對話框
	public static void emptyUserName(JFrame jFrame) {
		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("未輸入賬號！");
		jLabel.setFont(new Font("行楷", 0, 21));
		jLabel.setBounds(82, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);
	}

	// 未輸入密碼時彈出提示對話框
	public static void emptyPasswordJDialog(JFrame jFrame) {
		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("未輸入密碼！");
		jLabel.setFont(new Font("行楷", 0, 21));
		jLabel.setBounds(82, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);
	}

	// 賬號或密碼輸入錯誤！
	public static void failedLoginJDialog(JFrame jFrame) {

		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("賬號或密碼輸入錯誤！");
		jLabel.setFont(new Font("行楷", 0, 20));
		jLabel.setBounds(47, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);

	}
}

登錄判斷

package function;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JPasswordField;
import javax.swing.JTextField;

/**
 * 文件傳輸助手登錄功能
 * 
 * @author：360°順滑
 * 
 * @date: 2020/04/29
 * 
 */

public class Login {

	JTextField userNameTextField;
	JPasswordField passwordField;

	public Login(JTextField userNameTextField, JPasswordField passwordField) {
		this.userNameTextField = userNameTextField;
		this.passwordField = passwordField;
	}

	
	//判斷賬號是否為空方法
	public boolean isEmptyUserName() {
		if (userNameTextField.getText().equals(""))
			return true;
		else
			return false;
	}

	//判斷密碼是否為空方法
	public boolean isEmptyPassword() {
		//操作密碼框文本要先將其轉(zhuǎn)換為字符串
		if ("".equals(new String(passwordField.getPassword())))
			return true;
		else
			return false;
	}
	
	
	// 查詢是否存在該賬號密碼
	public boolean queryInformation() {

		File file = new File("src/txt/userInformation.txt");
		FileReader fileReader = null;
		BufferedReader bufferedReader = null;

		boolean vis = false;
		try {

			fileReader = new FileReader(file);
			bufferedReader = new BufferedReader(fileReader);

			Pattern userNamePattern = Pattern.compile("用戶名：.+");
			Pattern passwordPattern = Pattern.compile("密碼：.+");

			String str1 = null;
			while ((str1 = bufferedReader.readLine()) != null) {
				
				Matcher userNameMatcher = userNamePattern.matcher(str1);
				
				if(userNameMatcher.find()) {
					
					if (("用戶名：" + userNameTextField.getText()).equals(userNameMatcher.group())) {
						
						String str2 = bufferedReader.readLine();
						Matcher passwordMatcher = passwordPattern.matcher(str2);
						
						if(passwordMatcher.find()) {
							if (("密碼：" + new String(passwordField.getPassword())).equals(passwordMatcher.group())) {
								vis = true;
								break;
							}
						}
					}
				}
				
			}

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				bufferedReader.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			try {
				fileReader.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		if (vis)
			return true;
		else
			return false;
		
	}
}

主界面

package frame;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTarget;
import java.awt.dnd.DropTargetListener;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.Box;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.SimpleAttributeSet;

import function.DropTargetFile;
import function.FileSend;
import function.RecordsEcho;
import function.TextSend;

/**
 * 文件傳輸助手主界面
 * 
 * @author 360°順滑
 * 
 * @date:2020/04/29 ~ 2020/04/30
 *
 */

public class MainFrame {

	String userName;

	public MainFrame() {
	};

	public MainFrame(String userName) {
		this.userName = userName;
	}

	private JButton fileButton;
	private JButton historicRecordsButton;
	private JButton sendButton;
	private JTextPane showPane;
	private JTextPane inputPane;
	private JButton expressionButton;
	private JScrollPane scrollShowPane;
	private Box buttonBox;
	private Box inputBox;
	private Box sendBox;
	private Box totalBox;
	private ImageIcon image;
	static JFrame mainFrame;

	public void init() {

		// 顯示文本窗格
		showPane = new JTextPane();
		showPane.setSize(600, 400);
		showPane.setBackground(Color.WHITE);
		showPane.setEditable(false);
		showPane.setBorder(null);
		showPane.setFont(new Font("宋體", 0, 25));
		// 顯示文本窗格添加滾動條
		scrollShowPane = new JScrollPane(showPane);

		// 表情包按鈕并添加圖標(biāo)
		Icon expressionIcon = new ImageIcon("src/pictures/expression.png");
		expressionButton = new JButton(expressionIcon);
		expressionButton.setBackground(Color.WHITE);
		expressionButton.setFocusPainted(false);
		expressionButton.setBorderPainted(false);

		// 文件按鈕并添加圖標(biāo)
		Icon fileIcon = new ImageIcon("src/pictures/file.png");
		fileButton = new JButton(fileIcon);
		fileButton.setBackground(Color.WHITE);
		fileButton.setFocusPainted(false);
		fileButton.setBorderPainted(false);

		// 歷史記錄按鈕并添加圖標(biāo)
		Icon historicRecordsIcon = new ImageIcon("src/pictures/historicRecords.png");
		historicRecordsButton = new JButton(historicRecordsIcon);
		historicRecordsButton.setBackground(Color.WHITE);
		historicRecordsButton.setFocusPainted(false);
		historicRecordsButton.setBorderPainted(false);

		// 按鈕Box容器添加三個按鈕
		buttonBox = Box.createHorizontalBox();
		buttonBox.setPreferredSize(new Dimension(1000, 50));
		buttonBox.add(Box.createHorizontalStrut(10));
		buttonBox.add(expressionButton);
		buttonBox.add(Box.createHorizontalStrut(10));
		buttonBox.add(fileButton);
		buttonBox.add(Box.createHorizontalStrut(10));
		buttonBox.add(historicRecordsButton);
		// 添加 “歷史記錄”按鈕到右邊框的距離 到buttonBox容器中
		buttonBox.add(Box.createHorizontalGlue());

		// 輸入文本窗格
		inputPane = new JTextPane();
		inputPane.setSize(600, 300);
		inputPane.setFont(new Font("宋體", 0, 24));
		inputPane.setBackground(Color.WHITE);
		JScrollPane scrollInputPane = new JScrollPane(inputPane);

		// 輸入?yún)^(qū)域的Box容器
		inputBox = Box.createHorizontalBox();
		inputBox.setPreferredSize(new Dimension(1000, 150));
		inputBox.add(scrollInputPane);

		// 發(fā)送按鈕
		sendButton = new JButton("發(fā)送(S)");
		sendButton.setFont(new Font("行楷", Font.PLAIN, 20));
		sendButton.setBackground(Color.WHITE);
		sendButton.setFocusPainted(false);
		sendButton.setBorderPainted(false);

		// 發(fā)送Box容器并添加發(fā)送按鈕
		sendBox = Box.createHorizontalBox();
		sendBox.setPreferredSize(new Dimension(1000, 50));
		sendBox.setBackground(Color.white);
		sendBox.add(Box.createHorizontalStrut(710));
		sendBox.add(Box.createVerticalStrut(5));
		sendBox.add(sendButton);
		sendBox.add(Box.createVerticalStrut(5));

		// 總的Box容器添加以上3個Box
		totalBox = Box.createVerticalBox();
		totalBox.setPreferredSize(new Dimension(1000, 250));
		totalBox.setSize(1000, 400);
		totalBox.add(buttonBox);
		totalBox.add(inputBox);
		totalBox.add(Box.createVerticalStrut(3));
		totalBox.add(sendBox);
		totalBox.add(Box.createVerticalStrut(3));

		// 設(shè)置主窗體
		mainFrame = new JFrame("文件傳輸助手");
		mainFrame.setSize(950, 800);
		mainFrame.setLocationRelativeTo(null);
		mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		// 改變窗體logo
		image = new ImageIcon("src/pictures/logo.png");
		mainFrame.setIconImage(image.getImage());
		mainFrame.setLayout(new BorderLayout());
		// 添加窗體以上兩個主要容器
		mainFrame.add(scrollShowPane, BorderLayout.CENTER);
		mainFrame.add(totalBox, BorderLayout.SOUTH);
		mainFrame.setVisible(true);

		// 添加監(jiān)聽器
		addListen();

		// 信息記錄回顯到展示面板
		RecordsEcho echo = new RecordsEcho(userName, showPane);
		echo.read();

	}

	// 提示對話框
	public static void warnJDialog(String information) {
		JDialog jDialog = new JDialog(mainFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocation(770, 400);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel(information);
		jLabel.setFont(new Font("微軟雅黑", 0, 18));
		jLabel.setBounds(65, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		// 為彈出對話框按鈕添加監(jiān)聽事件
		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);
	}

	// 添加監(jiān)聽事件
	@SuppressWarnings("unused")
	public void addListen() {

		/*
		 * 為輸入文本添加目標(biāo)監(jiān)聽器
		 */

		// 創(chuàng)建拖拽目標(biāo)監(jiān)聽器
		DropTargetListener listener = new DropTargetFile(inputPane);
		// 在 inputPane上注冊拖拽目標(biāo)監(jiān)聽器
		DropTarget dropTarget = new DropTarget(inputPane, DnDConstants.ACTION_COPY_OR_MOVE, listener, true);

		// 發(fā)送按鈕監(jiān)聽事件
		sendButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent arg0) {
				// TODO Auto-generated method stub
				TextSend textSend = new TextSend(showPane, inputPane, userName);
				textSend.sendText();
			}
		});

		// 輸入框添加鍵盤事件
		inputPane.addKeyListener(new KeyListener() {

			// 發(fā)生擊鍵事件時被觸發(fā)
			@Override
			public void keyTyped(KeyEvent e) {

			}

			// 按鍵被釋放時被觸發(fā)
			@Override
			public void keyReleased(KeyEvent e) {

			}

			// 按鍵被按下時被觸發(fā)
			@Override
			public void keyPressed(KeyEvent e) {
				// TODO Auto-generated method stub

				// 如果按下的是 Ctrl + Enter 組合鍵 則換行
				if ((e.getKeyCode() == KeyEvent.VK_ENTER) && e.isControlDown()) {

					Document document = inputPane.getDocument();

					try {
						document.insertString(document.getLength(), "\n", new SimpleAttributeSet());
					} catch (BadLocationException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
					}

					// 否則發(fā)送
				} else if (e.getKeyCode() == KeyEvent.VK_ENTER) {

					TextSend textSend = new TextSend(showPane, inputPane, userName);
					textSend.sendText();

				}

			}

		});

		// 表情包按鈕監(jiān)聽事件
		expressionButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				new EmojiFrame(showPane, userName).init();
			}
		});

		// 文件按鈕監(jiān)聽事件
		fileButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent arg0) {
				// TODO Auto-generated method stub
				FileSend fileSend = new FileSend(userName, showPane, inputPane);
				fileSend.send();
			}
		});

		// 歷史記錄按鈕監(jiān)聽事件
		historicRecordsButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				new HistoricRecordsFrame(userName, showPane).init();
			}
		});
	}

}

~~登錄之前如果沒有賬號就得先注冊一個，那么進(jìn)入注冊功能！~~

二、注冊

點擊登錄界面的注冊按鈕，進(jìn)入注冊界面

未輸入賬號進(jìn)行注冊時

輸入賬號但未輸入密碼或者確認(rèn)密碼進(jìn)行注冊時

密碼和確認(rèn)密碼不一致時進(jìn)行注冊

賬號已存在進(jìn)行注冊時

注冊成功時

點擊確定按鈕或者關(guān)閉窗口后返回登錄界面

如果取消注冊，直接點擊返回按鈕就可以返回登錄界面了

注冊界面

package frame;

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import function.Register;

/**
 *
 * 文件傳輸助手注冊界面
 * 
 * @author 360°順滑
 * 
 * @date: 2020/04/27 ~ 2020/04/28
 *
 */
public class RegisterFrame {

	public JFrame registerJFrame;
	public JLabel userNameLabel;
	public JTextField userNameTextField;
	public JLabel passwordLabel;
	public JPasswordField passwordField;
	public JLabel passwordAgainLabel;
	public JPasswordField passwordAgainField;
	public JButton goBackButton;
	public JButton registerButton;


	public void init() {

		// 創(chuàng)建窗體
		registerJFrame = new JFrame("文件傳輸助手");
//		registerJFrame.setTitle();
		registerJFrame.setSize(540, 400);
		registerJFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		ImageIcon image = new ImageIcon("src/pictures/logo.png");
		registerJFrame.setIconImage(image.getImage());
		registerJFrame.setLocationRelativeTo(null);
		registerJFrame.setResizable(false);

		// 創(chuàng)建內(nèi)容面板
		Container container = registerJFrame.getContentPane();
		container.setLayout(null);

		// 創(chuàng)建“賬號”標(biāo)簽
		userNameLabel = new JLabel("賬號：");
		userNameLabel.setFont(new Font("行楷", Font.BOLD, 25));
		userNameLabel.setBounds(97, 25, 100, 100);
		container.add(userNameLabel);

		// 創(chuàng)建輸入賬號文本框
		userNameTextField = new JTextField();
		userNameTextField.setFont(new Font("黑體", Font.PLAIN, 23));
		userNameTextField.setBounds(170, 61, 280, 33);
		container.add(userNameTextField);

		// 創(chuàng)建“密碼”標(biāo)簽
		passwordLabel = new JLabel("密碼：");
		passwordLabel.setFont(new Font("行楷", Font.BOLD, 25));
		passwordLabel.setBounds(97, 90, 100, 100);
		container.add(passwordLabel);

		// 創(chuàng)建輸入密碼文本框
		passwordField = new JPasswordField();
		passwordField.setBounds(170, 125, 280, 33);
		passwordField.setFont(new Font("Arial", Font.BOLD, 23));
		container.add(passwordField);

		// 創(chuàng)建“確認(rèn)密碼”標(biāo)簽
		passwordAgainLabel = new JLabel("確認(rèn)密碼：");
		passwordAgainLabel.setFont(new Font("行楷", Font.BOLD, 25));
		passwordAgainLabel.setBounds(45, 150, 130, 100);
		container.add(passwordAgainLabel);

		// 創(chuàng)建確認(rèn)密碼文本框
		passwordAgainField = new JPasswordField();
		passwordAgainField.setBounds(170, 185, 280, 33);
		passwordAgainField.setFont(new Font("Arial", Font.BOLD, 23));
		container.add(passwordAgainField);

		// 創(chuàng)建返回按鈕
		goBackButton = new JButton("返回");
		goBackButton.setBounds(200, 260, 70, 40);
		goBackButton.setFont(new Font("微軟雅黑", 1, 18));
		goBackButton.setBackground(Color.WHITE);
		goBackButton.setFocusPainted(false);
		goBackButton.setBorderPainted(false);
		container.add(goBackButton);

		// 創(chuàng)建注冊按鈕
		registerButton = new JButton("注冊");
		registerButton.setBounds(330, 260, 70, 40);
		registerButton.setFont(new Font("微軟雅黑", 1, 18));
		registerButton.setBackground(Color.WHITE);
		registerButton.setFocusPainted(false);
		registerButton.setBorderPainted(false);
		container.add(registerButton);

		// 顯示窗體
		registerJFrame.setVisible(true);

		addListen();

	}

	// 為按鈕添加監(jiān)聽事件
	public void addListen() {

		// 為注冊按鈕添加監(jiān)聽事件
		registerButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				// 創(chuàng)建register對象，同時將RegisterFrame的文本框內(nèi)容作為參數(shù)傳過去
				Register register = new Register(userNameTextField, passwordField, passwordAgainField);

				// 判斷輸入賬號是否為空
				if (register.isEmptyUserName()) {

					emptyUserName(registerJFrame);

				} else {

					// 判斷輸入密碼是否為空
					if (register.isEmptyPassword()) {
						emptyPasswordJDialog(registerJFrame);
					}

					else {
						// 判斷密碼和確認(rèn)密碼是否一致
						if (register.isSamePassWord()) {

							// 判斷賬號是否已存在
							if (!register.isExistAccount()) {

								// 注冊成功！?。?

								register.saveInformation();
								registerJFrame.dispose();
								userNameTextField.setText("");
								passwordField.setText("");
								passwordAgainField.setText("");

								new LoginFrame();
								LoginFrame.loginJFrame.setVisible(true);

								successRegisterJDialog(registerJFrame);

							} else
								existAccountJDialog(registerJFrame);
						} else {
							differentPasswordJDialog(registerJFrame);
							passwordField.setText("");
							passwordAgainField.setText("");
						}
					}
				}

			}
		});

		// 為返回按鈕添加監(jiān)聽事件
		goBackButton.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// 銷毀注冊窗口
				registerJFrame.dispose();

				// 重新顯示登錄窗口
				new LoginFrame();
				LoginFrame.loginJFrame.setVisible(true);
			}
		});

	}

	/*
	 * 由于各個標(biāo)簽長度不同，所以為了界面美觀，就寫了三個彈出對話框而不是一個！
	 * 
	 */

	// 未輸入賬號時彈出提示對話框
	public void emptyUserName(JFrame jFrame) {
		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("未輸入用戶名！");
		jLabel.setFont(new Font("行楷", 0, 21));
		jLabel.setBounds(73, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);
	}

	// 未輸入密碼時彈出提示對話框
	public void emptyPasswordJDialog(JFrame jFrame) {
		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("未輸入密碼！");
		jLabel.setFont(new Font("行楷", 0, 21));
		jLabel.setBounds(73, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);
	}

	// 密碼和確認(rèn)密碼不一致時彈出提示框
	public void differentPasswordJDialog(JFrame jFrame) {

		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("輸入密碼不一致！");
		jLabel.setFont(new Font("行楷", 0, 21));
		jLabel.setBounds(63, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);

	}

	// 已存在賬號彈出提示對話框
	public void existAccountJDialog(JFrame jFrame) {

		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("該賬號已存在！");
		jLabel.setFont(new Font("行楷", 0, 21));
		jLabel.setBounds(73, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				jDialog.dispose();
			}
		});

		jDialog.setVisible(true);

	}

	// 成功注冊對話框
	public void successRegisterJDialog(JFrame jFrame) {

		JDialog jDialog = new JDialog(jFrame, "提示");
		jDialog.setLayout(null);
		jDialog.setSize(300, 200);
		jDialog.setLocationRelativeTo(null);
		ImageIcon image = new ImageIcon("src/pictures/warn.png");
		jDialog.setIconImage(image.getImage());

		JLabel jLabel = new JLabel("注冊成功！");
		jLabel.setFont(new Font("行楷", 0, 21));
		jLabel.setBounds(73, 0, 200, 100);
		jDialog.add(jLabel);

		JButton button = new JButton("確定");
		button.setBounds(105, 80, 70, 40);
		button.setFont(new Font("微軟雅黑", 1, 18));
		button.setBackground(Color.WHITE);
		button.setFocusPainted(false);
		button.setBorderPainted(false);
		jDialog.add(button);

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				// 銷毀提示對話框
				jDialog.dispose();

			}
		});

		jDialog.setVisible(true);

	}

}

注冊判斷

package function;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JPasswordField;
import javax.swing.JTextField;

/**
 * 文件傳輸助手注冊功能
 * 
 * @author：360°順滑
 * 
 * @date：2020/04/28 ~ 2020/04/29
 * 
 */

public class Register {

	
	JTextField userNameTextField;
	JPasswordField passwordField;
	JPasswordField passwordAgainField;

	//將RegisterFrame參數(shù)傳入進(jìn)來
	public Register(JTextField userNameTextField, JPasswordField passwordField, JPasswordField passwordAgainField) {
		this.userNameTextField = userNameTextField;
		this.passwordField = passwordField;
		this.passwordAgainField = passwordAgainField;
	}

	
	//判斷賬號是否為空方法
	public boolean isEmptyUserName() {
		if (userNameTextField.getText().equals(""))
			return true;
		else
			return false;
	}

	
	//判斷密碼是否為空方法
	public boolean isEmptyPassword() {
		//操作密碼框文本要先將其轉(zhuǎn)換為字符串
		if ("".equals(new String(passwordField.getPassword())) || "".equals(new String(passwordAgainField.getPassword())))
			return true;
		else
			return false;
	}

	
	//判斷密碼和輸入密碼是否一致方法
	public boolean isSamePassWord() {
		
		//操作密碼框文本要先將其轉(zhuǎn)換為字符串
		if (new String(passwordField.getPassword()).equals(new String(passwordAgainField.getPassword())))
			return true;
		else
			return false;
	}

	
	//判斷賬號是否已存在方法
	public boolean isExistAccount() {
		File file = new File("src/txt/userInformation.txt");

		FileReader fileReader = null;
		BufferedReader bufferedReader = null;

		boolean vis = false;

		try {
			fileReader = new FileReader(file);
			bufferedReader = new BufferedReader(fileReader);

			//正則表達(dá)式
			Pattern pattern = Pattern.compile("用戶名：.+");

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				Matcher matcher = pattern.matcher(str);
				if (matcher.find()) {
					if (("用戶名：" + userNameTextField.getText()).equals(matcher.group())) {
						vis = true;
						break;
					}
				}

			}

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			if (bufferedReader != null) {
				try {
					bufferedReader.close();
				} catch (IOException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
			}

			if (fileReader != null) {
				try {
					fileReader.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}

		if (!vis) {
			return false;
		} else {
			return true;
		}

	}
	

	//保存信息到本地
	public void saveInformation() {
		File file = new File("src/txt/userInformation.txt");

		FileWriter fileWriter = null;
		BufferedWriter bufferedWriter = null;

		try {
			fileWriter = new FileWriter(file, true);
			bufferedWriter = new BufferedWriter(fileWriter);

			bufferedWriter.write("用戶名：" + userNameTextField.getText());
			bufferedWriter.newLine();
			bufferedWriter.write("密碼：" + new String(passwordField.getPassword()));
			bufferedWriter.newLine();
			bufferedWriter.flush();

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			if (bufferedWriter != null) {
				try {
					bufferedWriter.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

			if (fileWriter != null) {
				try {
					fileWriter.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}

	}
}

三、發(fā)送文字

輸入文字后可以點擊發(fā)送按鈕發(fā)送，也可以通過鍵盤Enter鍵發(fā)送

發(fā)送空白信息時彈出提示，提示框代碼在主界面類里

發(fā)送文本：

package function;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JFrame;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.SimpleAttributeSet;

import frame.MainFrame;

/**
 * 實現(xiàn)發(fā)送消息，并保存到信息記錄
 * 
 * @author 360°順滑
 * 
 * @date 2020/05/01
 *
 */
public class TextSend {

	JFrame mainFrame;
	JTextPane textShowPane;
	JTextPane textInputPane;
	String userName;

	public TextSend(JTextPane textShowPane, JTextPane textInputPane, String userName) {
		this.textShowPane = textShowPane;
		this.textInputPane = textInputPane;
		this.userName = userName;
	}

	public void sendText() {

		if (!("".equals(textInputPane.getText()))) {

			// 獲取日期并設(shè)置日期格式
			Date date = new Date();
			SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
			SimpleAttributeSet attributeSet = new SimpleAttributeSet();

			// 輸入文本
			String inputText = dateFormat.format(date) + "\n";

			Pattern pattern = Pattern.compile(".+[\\.].+");
			Matcher matcher = pattern.matcher(textInputPane.getText());

			// 判斷是否為文件
			boolean isFile = false;
			// 判斷是否為第一個文件
			boolean isFirst = true;
			while (matcher.find()) {
				isFile = true;

				// 獲得文件名
				int index = matcher.group().lastIndexOf("\\");
				String fileName = matcher.group().substring(index + 1);

				// 圖片的情況
				if (matcher.group().endsWith(".png") || matcher.group().endsWith(".jpg")
						|| matcher.group().endsWith(".jpeg") || matcher.group().endsWith("gif")) {

					Document document = textShowPane.getDocument();

					try {

						if (isFirst) {
							isFirst = false;
							document.insertString(document.getLength(), inputText, new SimpleAttributeSet());
							new RecordsEcho(userName, textShowPane).writeImage(matcher.group(), fileName);
							document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

						}

						else {
							new RecordsEcho(userName, textShowPane).writeImage(matcher.group(), fileName);
							document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

						}

					} catch (BadLocationException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}

				} else {// 文件的情況

					Document document = textShowPane.getDocument();

					try {

						if (isFirst) {
							isFirst = false;
							document.insertString(document.getLength(), inputText, new SimpleAttributeSet());
							new RecordsEcho(userName, textShowPane).writeFile(matcher.group(), fileName);
							document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

						}

						else {
							new RecordsEcho(userName, textShowPane).writeFile(matcher.group(), fileName);
							document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

						}

					} catch (BadLocationException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}

				}

			}

			if (!isFile) {

				// 實現(xiàn)發(fā)送文本太長自動換行
				String str = "";

				for (int i = 0; i < textInputPane.getText().length(); i++) {

					if (i != 0 && i % 15 == 0)
						str += "\n";

					str += textInputPane.getText().charAt(i);

				}

				Document document = textShowPane.getDocument();

				try {
					document.insertString(document.getLength(), inputText + str + "\n\n", attributeSet);
				} catch (BadLocationException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

			// 把信息保存到對應(yīng)的用戶本地歷史記錄txt文件
			SaveRecords records = new SaveRecords(userName, inputText + textInputPane.getText() + "\n\n");
			records.saveRecords();

			textInputPane.setText("");

		} else {
			new MainFrame();
			MainFrame.warnJDialog("不能發(fā)送空白信息！");
		}
	}
}

其實這個類不單單只是發(fā)送文本這么簡單，因為后續(xù)實現(xiàn)了拖拽發(fā)送文件，拖拽后會在輸入框自動輸入文件路徑，實現(xiàn)的代碼有關(guān)聯(lián)，就寫在這里了。

四、發(fā)送圖片、文件和表情包

圖片文件的發(fā)送主要是通過打開本地瀏覽發(fā)送的

發(fā)送文件、圖片、表情包：

package function;

import java.awt.Color;
import java.awt.Desktop;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.SimpleAttributeSet;

/**
 * 實現(xiàn)打開文件按鈕發(fā)送圖片文件表情包
 * 
 * @author 360°順滑
 *
 * @date 2020/05/01
 */
public class FileSend {

	String userName;
	String path;
	String fileName;
	JTextPane textShowPane;
	JTextPane textInputPane;

	public FileSend() {};
	
	public FileSend(String userName, JTextPane textShowPane, JTextPane textInputPane) {

		this.userName = userName;
		this.textShowPane = textShowPane;
		this.textInputPane = textInputPane;
	}

	
	// 彈出選擇框并判斷發(fā)送的是文件還是圖片
	public void send() {
		// 點擊文件按鈕可以打開文件選擇框
		JFileChooser fileChooser = new JFileChooser();

		int result = fileChooser.showOpenDialog(null);

		if (result == JFileChooser.APPROVE_OPTION) {

			// 被選擇文件路徑
			path = fileChooser.getSelectedFile().getAbsolutePath();
			// 被選擇文件名稱
			fileName = fileChooser.getSelectedFile().getName();

			// 選擇的是圖片
			if (path.endsWith(".png") || path.endsWith(".jpg") || path.endsWith(".gif") || path.endsWith(".jpeg")) {
				sendImage(path, fileName);
			} else {
				sendFile(path, fileName);
			}

		}
		
		
	}

	
	// 發(fā)送圖片
	public void sendImage(String path, String fileName) {

		// 獲取圖片
		ImageIcon imageIcon = new ImageIcon(path);

		// 如果圖片比整個界面大則調(diào)整大小
		int width, height;
		if (imageIcon.getIconWidth() > 950 || imageIcon.getIconHeight() > 400) {
			width = 600;
			height = 250;
		} else {
			width = imageIcon.getIconWidth();
			height = imageIcon.getIconHeight();
		}

		// 設(shè)置圖片大小
		imageIcon.setImage(imageIcon.getImage().getScaledInstance(width, height, 0));

		// 獲取日期
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM--dd HH:mm:ss");

		String input = dateFormat.format(date) + "\n";

		// 為圖片名稱添加按鈕，用于打開圖片
		JButton button = new JButton(fileName);
		button.setFont(new Font("宋體", Font.PLAIN, 20));
		button.setBackground(Color.WHITE);
		button.setBorderPainted(false);
		button.setFocusPainted(false);

		// 獲取整個展示面板的內(nèi)容，方便圖片文件的插入
		Document document = textShowPane.getDocument();
		try {
			// 插入日期
			document.insertString(document.getLength(), input, new SimpleAttributeSet());

			// 插入圖片
			textShowPane.insertIcon(imageIcon);

			// 換行
			document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

			// 插入按鈕，也就是圖片名稱
			textShowPane.insertComponent(button);

			document.insertString(document.getLength(), "\n\n", new SimpleAttributeSet());

		} catch (BadLocationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// 為按鈕添加點擊事件
		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				try {

					// 實現(xiàn)打開文件功能
					File file = new File(path);
					Desktop.getDesktop().open(file);
				} catch (IOException e2) {
					// TODO Auto-generated catch block
					e2.printStackTrace();
				}
			}
		});

		// 輸入框重新清空
		textInputPane.setText("");

		// 保存路徑到對應(yīng)的賬號信息里
		String saveText = input + path + "\n\n";
		SaveRecords records = new SaveRecords(userName, saveText);
		records.saveRecords();
	}
	

	// 發(fā)送文件
	public void sendFile(String path, String fileName) {
		// 獲取固定文件圖標(biāo)
		Icon fileImage = new ImageIcon("src/pictures/document.png");

		// 獲取日期
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

		String input = dateFormat.format(date) + "\n";

		// 為名稱添加按鈕
		JButton button = new JButton(fileName);
		button.setFont(new Font("宋體", Font.PLAIN, 20));
		button.setBackground(Color.WHITE);
		button.setBorderPainted(false);
		button.setFocusPainted(false);

		// 獲取面板內(nèi)容
		Document document = textShowPane.getDocument();

		try {
			document.insertString(document.getLength(), input, new SimpleAttributeSet());

			textShowPane.insertIcon(fileImage);

			textShowPane.insertComponent(button);

			document.insertString(document.getLength(), "\n\n", new SimpleAttributeSet());
		} catch (BadLocationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		//為名稱按鈕添加監(jiān)聽事件，實現(xiàn)打開功能
		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				try {
					// 實現(xiàn)打開文件功能
					File file = new File(path);
					Desktop.getDesktop().open(file);
				} catch (IOException e2) {
					// TODO Auto-generated catch block
					e2.printStackTrace();
				}
			}
		});

		textInputPane.setText("");

		// 保存路徑到對應(yīng)的賬號信息里
		String saveText = input + path + "\n\n";
		SaveRecords records = new SaveRecords(userName, saveText);
		records.saveRecords();
	}
	
	//發(fā)送表情包功能
	public void sendEmoji(String path) {

		// 獲取圖片
		ImageIcon imageIcon = new ImageIcon(path);

		// 獲取日期
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM--dd HH:mm:ss");

		String input = dateFormat.format(date) + "\n";

		// 獲取整個展示面板的內(nèi)容，方便圖片文件的插入
		Document document = textShowPane.getDocument();
		try {
			// 插入日期
			document.insertString(document.getLength(), input, new SimpleAttributeSet());

			// 插入圖片
			textShowPane.insertIcon(imageIcon);

			document.insertString(document.getLength(), "\n\n", new SimpleAttributeSet());

		} catch (BadLocationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// 輸入框重新清空
		textInputPane.setText("");

	}
}

五、保存歷史記錄

發(fā)送文字、圖片、文件和表情包的信息（文字或路徑）都要保存到本地，以便歷史信息的回顯，查找歷史信息。

package function;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;


/**
 * 該類實現(xiàn)保存信息記錄
 * 
 * 
 * @author 360°順滑
 *
 * @date 2020/05/01
 *
 */
public class SaveRecords {
	
	String userName;
	String input;
	
	public SaveRecords(String userName,String input) {
		this.userName = userName;
		this.input = input;
	}
	
	public void saveRecords() {
		
		String path = "src/txt/" + userName + ".txt";
		
		File file = new File(path);

		// 文件不存在就創(chuàng)建一個
		if (!file.exists()) {

			try {
				file.createNewFile();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

		}

		FileWriter fileWriter = null;
		BufferedWriter bufferedWriter = null;
		try {
			fileWriter = new FileWriter(file,true);
			bufferedWriter = new BufferedWriter(fileWriter);
			bufferedWriter.write(input);
			bufferedWriter.flush();

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			if (bufferedWriter != null) {
				try {
					bufferedWriter.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

			if (fileWriter != null) {
				try {
					fileWriter.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
	}
}

六、歷史記錄回顯

登錄后進(jìn)入主界面或者進(jìn)入歷史記錄界面會看到該賬號以前發(fā)送過的信息記錄

歷史記錄回顯：

package function;

import java.awt.Color;
import java.awt.Desktop;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.SimpleAttributeSet;

/**
 * 
 * 該類實現(xiàn)歷史記錄回顯
 * 
 * @author 360°順滑
 * 
 * @date 2020/05/02
 *
 */
public class RecordsEcho {

	private String userName;
	private JTextPane showPane;

	public RecordsEcho(String userName, JTextPane showPane) {
		this.userName = userName;
		this.showPane = showPane;
	}

	// 將用戶的信息記錄回顯到展示面板
	public void read() {

		// 對應(yīng)賬號的信息記錄文本
		File file = new File("src/txt/" + userName + ".txt");

		// 文件不存在就創(chuàng)建一個
		if (!file.exists()) {

			try {
				file.createNewFile();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

		}

		FileReader fileReader = null;
		BufferedReader bufferedReader = null;

		try {

			fileReader = new FileReader(file);
			bufferedReader = new BufferedReader(fileReader);

			// 正則表達(dá)式
			Pattern pattern = Pattern.compile(".+[\\.].+");

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {

				Matcher matcher = pattern.matcher(str);

				// 如果是文件或圖片
				if (matcher.find()) {

					// 獲得文件名
					int index = str.lastIndexOf("\\");
					String fileName = str.substring(index + 1);

					// 圖片的情況
					if (str.endsWith(".png") || str.endsWith(".jpg") || str.endsWith(".jpeg") || str.endsWith("gif")) {

						Pattern pattern1 = Pattern.compile("[emoji_].+[\\.].+");

						Matcher matcher1 = pattern1.matcher(fileName);

						// 如果是表情包
						if (matcher1.find()) {
							writeEmoji(str);
						} else {
							writeImage(str, fileName);
						}
					} else {
						// 文件的情況
						writeFile(str, fileName);
					}

				} else {
					// 如果是文本則直接寫入
					writeText(str);
				}

			}

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				bufferedReader.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			try {
				fileReader.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

	}

	// 把文本顯示在展示面板
	public void writeText(String str) {

		String s = "";

		for (int i = 0; i < str.length(); i++) {

			if (i != 0 && i % 30 == 0)
				s += "\n";

			s += str.charAt(i);

		}

		Document document = showPane.getDocument();

		try {
			document.insertString(document.getLength(), s + "\n", new SimpleAttributeSet());
		} catch (BadLocationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	public void writeEmoji(String path) {

		// 獲取圖片
		ImageIcon imageIcon = new ImageIcon(path);

		// 獲取整個展示面板的內(nèi)容，方便圖片文件的插入
		Document document = showPane.getDocument();

		try {

			// 插入圖片
			showPane.insertIcon(imageIcon);

			// 換行
			document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

		} catch (BadLocationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	// 把圖片顯示在展示面板
	public void writeImage(String path, String fileName) {
		// 獲取圖片
		ImageIcon imageIcon = new ImageIcon(path);

		// 如果圖片比整個界面大則調(diào)整大小
		int width, height;
		if (imageIcon.getIconWidth() > 950 || imageIcon.getIconHeight() > 400) {
			width = 600;
			height = 250;
		} else {
			width = imageIcon.getIconWidth();
			height = imageIcon.getIconHeight();
		}

		// 設(shè)置圖片大小
		imageIcon.setImage(imageIcon.getImage().getScaledInstance(width, height, 0));


		// 為圖片名稱添加按鈕，用于打開圖片
		JButton button = new JButton(fileName);
		button.setFont(new Font("宋體", Font.PLAIN, 20));
		button.setBackground(Color.WHITE);
		button.setBorderPainted(false);
		button.setFocusPainted(false);

		// 獲取整個展示面板的內(nèi)容，方便圖片文件的插入
		Document document = showPane.getDocument();
		try {

			// 插入圖片
			showPane.insertIcon(imageIcon);

			// 換行
			document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

			// 插入按鈕，也就是圖片名稱
			showPane.insertComponent(button);

			document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

		} catch (BadLocationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// 為按鈕添加點擊事件
		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				try {

					// 實現(xiàn)打開文件功能
					File file = new File(path);
					Desktop.getDesktop().open(file);
				} catch (IOException e2) {
					// TODO Auto-generated catch block
					e2.printStackTrace();
				}
			}
		});

	}

	// 把文件顯示在展示面板中
	public void writeFile(String path, String fileName) {

		// 獲取固定文件圖標(biāo)
		Icon fileImage = new ImageIcon("src/pictures/document.png");

		// 為名稱添加按鈕
		JButton button = new JButton(fileName);
		button.setFont(new Font("宋體", Font.PLAIN, 20));
		button.setBackground(Color.WHITE);
		button.setBorderPainted(false);
		button.setFocusPainted(false);

		// 獲取面板內(nèi)容
		Document document = showPane.getDocument();

		try {

			showPane.insertIcon(fileImage);

			showPane.insertComponent(button);

			document.insertString(document.getLength(), "\n", new SimpleAttributeSet());
		} catch (BadLocationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		button.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				try {
					// 實現(xiàn)打開文件功能
					File file = new File(path);
					Desktop.getDesktop().open(file);
				} catch (IOException e2) {
					// TODO Auto-generated catch block
					e2.printStackTrace();
				}
			}
		});

	}

}

七、發(fā)送表情包

通過主界面表情包按鈕可以打開表情包窗口

點擊表情包，可以發(fā)送表情包

表情包界面

package frame;

import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.SimpleAttributeSet;

import function.SaveRecords;



/**
 * 該類實現(xiàn)表情包窗體
 * 
 * @author 360°順滑
 * 
 * @date 2020/05/03
 *
 */
public class EmojiFrame {

	//展示面板
	private JTextPane showPane;
	
	//表情包按鈕
	private JButton[] buttons = new JButton[55];

	//表情包圖片
	private ImageIcon[] icons = new ImageIcon[55];

	//表情包對話框
	private JDialog emojiJDialog;
	
	//賬號
	private String userName;

	public EmojiFrame(JTextPane showPane,String userName) {
		this.showPane = showPane;
		this.userName = userName;
	}
	
	//表情包窗體
	public void init() {

		//用對話框來裝表情包
		emojiJDialog = new JDialog();
		emojiJDialog.setTitle("表情包");
		emojiJDialog.setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
		emojiJDialog.setLayout(new GridLayout(6, 9));
		emojiJDialog.setBounds(490, 263, 500, 400);
		emojiJDialog.setBackground(Color.WHITE);
		ImageIcon image = new ImageIcon("src/pictures/emoji.png");
		emojiJDialog.setIconImage(image.getImage());

		//表情包用按鈕來實現(xiàn)，主要是可以添加監(jiān)聽事件，點擊后可以實現(xiàn)發(fā)送
		for (int i = 1; i <= 54; i++) {

			String path = "src/pictures/emoji_" + i + ".png";
			icons[i] = new ImageIcon(path);
			buttons[i] = new JButton(icons[i]);
			buttons[i].setBackground(Color.WHITE);
			buttons[i].setBorder(null);
			buttons[i].setBorderPainted(false);
			buttons[i].setSize(20, 20);
			buttons[i].setFocusPainted(false);

			emojiJDialog.add(buttons[i]);

		}
		
		emojiJDialog.setVisible(true);
		
		//添加監(jiān)聽事件
		addListen();

	}
	
	
	//監(jiān)聽事件
	public void addListen() {
		
		//為每一個按鈕添加監(jiān)聽事件
		for(int i=1;i<=54;i++) {
			
			String path = "src/pictures/emoji_" + i + ".png";
			
			buttons[i].addActionListener(new ActionListener() {
				
				@Override
				public void actionPerformed(ActionEvent e) {
					// TODO Auto-generated method stub
					
					//獲取圖片
					ImageIcon imageIcon = new ImageIcon(path);			
					
					// 獲取日期
					Date date = new Date();
					SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

					String input = dateFormat.format(date) + "\n";
					
					Document document = showPane.getDocument();
					
					try {
						//寫入日期
						document.insertString(document.getLength(), input, new SimpleAttributeSet());
						
						//插入圖片
						showPane.insertIcon(imageIcon);
						
						//換行
						document.insertString(document.getLength(), "\n\n", new SimpleAttributeSet());
						
					} catch (BadLocationException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
					}
					
					// 保存路徑到對應(yīng)的賬號信息里，因為用的是絕對路徑，所以要根據(jù)實際來修改
					String saveText = input + "D:\\eclipse jee\\FileTransfer\\" + path + "\n\n";
					SaveRecords records = new SaveRecords(userName, saveText);
					records.saveRecords();
					
					
					emojiJDialog.setVisible(false);
				}
			});
		}
	}
}

發(fā)送表情包

//該方法寫在FileSend類
//發(fā)送表情包功能

public void sendEmoji(String path) {

	// 獲取圖片
	ImageIcon imageIcon = new ImageIcon(path);


	// 獲取日期
	Date date = new Date();
	SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM--dd HH:mm:ss");

	String input = dateFormat.format(date) + "\n";

	// 獲取整個展示面板的內(nèi)容，方便圖片文件的插入
	Document document = textShowPane.getDocument();
	try {
		// 插入日期
		document.insertString(document.getLength(), input, new SimpleAttributeSet());

		// 插入圖片
		textShowPane.insertIcon(imageIcon);


		document.insertString(document.getLength(), "\n\n", new SimpleAttributeSet());

	} catch (BadLocationException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}


	// 輸入框重新清空
	textInputPane.setText("");

}

八、查看歷史

記錄通過主界面的歷史記錄按鈕可以打開歷史記錄窗口

歷史記錄界面

package frame;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Box;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTextPane;

import function.ClearRecords;
import function.FindRecords;
import function.RecordsEcho;



/**
 * 該類實現(xiàn)歷史記錄窗口
 * 
 * @author 360°順滑
 *
 * @date 2020/05/02
 *
 */
public class HistoricRecordsFrame {

	private String userName;
	private JTextPane textShowPane;
	
	private JFrame historicRecordsFrame;
	private JButton findRecordsButton;
	private JButton clearRecordsButton;
	private JTextField searchTextField;
	private JTextPane recordsShowPane;
	private Box clearBox;

	public HistoricRecordsFrame(String userName,JTextPane textShowPane) {
		this.userName = userName;
		this.textShowPane = textShowPane;
	}
	
	
	public void init() {

		// 搜索文本框
		searchTextField = new JTextField();
		searchTextField.setFont(new Font("宋體", 0, 25));

		// 查找記錄按鈕
		findRecordsButton = new JButton("查找記錄");
		findRecordsButton.setFont(new Font("行楷", Font.PLAIN, 20));
		findRecordsButton.setBackground(Color.WHITE);
		findRecordsButton.setBorderPainted(false);
		findRecordsButton.setFocusPainted(false);

		// 將搜索文本框和搜索按鈕放入Box容器
		Box searchBox = Box.createHorizontalBox();
		searchBox.setPreferredSize(new Dimension(900, 47));
		searchBox.setBackground(Color.white);
		searchBox.add(Box.createHorizontalStrut(35));
		searchBox.add(searchTextField);
		searchBox.add(Box.createHorizontalStrut(20));
		searchBox.add(findRecordsButton);
		searchBox.add(Box.createHorizontalStrut(25));

		// 顯示文本窗格
		recordsShowPane = new JTextPane();
		recordsShowPane.setSize(900, 600);
		recordsShowPane.setBackground(Color.WHITE);
		recordsShowPane.setEditable(false);
		recordsShowPane.setBorder(null);
		recordsShowPane.setFont(new Font("宋體", 0, 25));
		// 顯示文本窗格添加滾動條
		JScrollPane scrollShowPane = new JScrollPane(recordsShowPane);

		// 清空記錄按鈕
		clearRecordsButton = new JButton("清空記錄");
		clearRecordsButton.setFont(new Font("行楷", Font.PLAIN, 20));
		clearRecordsButton.setBackground(Color.WHITE);
		clearRecordsButton.setBorderPainted(false);
		clearRecordsButton.setFocusable(false);

		// Box容器并添加清空記錄按鈕
		clearBox = Box.createHorizontalBox();
		clearBox.setPreferredSize(new Dimension(1000, 60));
		clearBox.setBackground(Color.white);
		clearBox.add(Box.createVerticalStrut(5));
		clearBox.add(clearRecordsButton);
		clearBox.add(Box.createVerticalStrut(5));

		// 設(shè)置主窗體
		historicRecordsFrame = new JFrame("歷史記錄");
		historicRecordsFrame.setSize(900, 700);
		historicRecordsFrame.setLocationRelativeTo(null);
		historicRecordsFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		// 改變窗體logo
		ImageIcon image = new ImageIcon("src/pictures/historicRecordsLogo.png");
		historicRecordsFrame.setIconImage(image.getImage());
		historicRecordsFrame.setLayout(new BorderLayout());
		// 添加窗體以上兩個主要容器
		historicRecordsFrame.add(searchBox, BorderLayout.NORTH);
		historicRecordsFrame.add(scrollShowPane, BorderLayout.CENTER);
		historicRecordsFrame.add(clearBox, BorderLayout.SOUTH);
		historicRecordsFrame.setVisible(true);
		
		addListen();
		
		RecordsEcho recordsEcho = new RecordsEcho(userName, recordsShowPane);
		recordsEcho.read();
		
		
		
	}
	
	
	//添加按鈕監(jiān)聽事件
	public void addListen() {
		
		//清空歷史記錄監(jiān)聽事件
		clearRecordsButton.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				new ClearRecords(userName,textShowPane,recordsShowPane).clear();
			}
		});
		
		//查找記錄監(jiān)聽事件
		findRecordsButton.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				FindRecords findRecords = new FindRecords(recordsShowPane,userName,searchTextField.getText());
				findRecords.find();
			}
		});
	}
}

~~歷史記錄回顯的代碼上面已經(jīng)給了，這里就不貼了。~~

還有一點功能值得一提，就是點擊歷史記錄中的圖片文件可以直接打開！

九、查找歷史記錄

輸入關(guān)鍵字點擊查找記錄按鈕可以實現(xiàn)歷史記錄的查找，找不到則顯示“無相關(guān)記錄！”

查找歷史記錄

package function;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JTextPane;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.SimpleAttributeSet;

/**
 * 該類實現(xiàn)查找歷史記錄
 * 
 * 這段代碼說實話，寫得有點糟，本來后期要優(yōu)化，但是有點難搞，就這樣吧，將就著看！
 * 
 * 
 * @author 360°順滑
 *
 * @date 2020/05/02
 */
public class FindRecords {

	private JTextPane recordsShowPane;
	private String userName;
	private String keywords;

	public FindRecords(JTextPane recordsShowPane, String userName, String keywords) {
		this.recordsShowPane = recordsShowPane;
		this.userName = userName;
		this.keywords = keywords;
	}

	// 該方法包括查找文本、圖片、文件，因為要交叉使用，所以寫在一起了
	public void find() {

		// 如果查找的不為空
		if (!(keywords.equals(""))) {

			// 查找相關(guān)賬號歷史記錄
			File file = new File("src/txt/" + userName + ".txt");

			FileReader fileReader = null;
			BufferedReader bufferedReader = null;

			try {

				fileReader = new FileReader(file);
				bufferedReader = new BufferedReader(fileReader);

				String str = "";
				String str1 = null;

				// 先把所有文本找到
				while ((str1 = bufferedReader.readLine()) != null) {

					if (str1.equals(""))
						str += "\n";
					else
						str = str + str1 + "\n";

				}

				// 正則表達(dá)式匹配要找的內(nèi)容
				Pattern pattern = Pattern.compile(".+\n.*" + keywords + ".*\n\n");
				Matcher matcher = pattern.matcher(str);

				// 標(biāo)記有沒有找到
				boolean isExist = false;

				// 標(biāo)記是否第一次找到
				boolean oneFind = false;

				// 如果找到了
				while (matcher.find()) {

					isExist = true;
					// 正則表達(dá)式匹配是否為文件圖片路徑
					Pattern pattern1 = Pattern.compile(".+[\\.].+");
					Matcher matcher1 = pattern1.matcher(matcher.group());

					// 如果是文件或者圖片
					if (matcher1.find()) {

						// 截取日期
						int index3 = matcher.group().indexOf("\n");
						String date = matcher.group().substring(0, index3);

						// 獲得文件名
						int index1 = matcher.group().lastIndexOf("\\");
						int index2 = matcher.group().lastIndexOf("\n\n");
						String fileName = matcher.group().substring(index1 + 1, index2);

						// 圖片的情況
						if (fileName.endsWith(".png") || fileName.endsWith(".jpg") || fileName.endsWith(".jpeg")
								|| fileName.endsWith("gif")) {

							Pattern pattern2 = Pattern.compile("[emoji_].+[\\.].+");
							Matcher matcher2 = pattern2.matcher(fileName);

							// 如果是表情包則不需要添加名稱
							if (matcher2.find()) {

								if (!oneFind) {

									// 寫入日期
									recordsShowPane.setText(date + "\n");

									// 插入表情包和名稱
									RecordsEcho echo = new RecordsEcho(fileName, recordsShowPane);
									echo.writeEmoji(matcher1.group());

									Document document = recordsShowPane.getDocument();
									
									try {
										document.insertString(document.getLength(), "\n", new SimpleAttributeSet());
									} catch (BadLocationException e) {
										// TODO Auto-generated catch block
										e.printStackTrace();
									}
									
									
									oneFind = true;

								} else { // 不是第一次就直接寫入

									Document document = recordsShowPane.getDocument();

									try {

										document.insertString(document.getLength(), date + "\n",
												new SimpleAttributeSet());

										RecordsEcho echo = new RecordsEcho(fileName, recordsShowPane);
										echo.writeEmoji(matcher1.group());
										
										document.insertString(document.getLength(), "\n", new SimpleAttributeSet());



									} catch (BadLocationException e) {
										// TODO Auto-generated catch block
										e.printStackTrace();
									}

								}

							}

							// 不是表情包的圖片
							else {

								// 如果是第一次找到，要先清空再寫入
								if (!oneFind) {
									// 寫入日期
									recordsShowPane.setText(date + "\n");

									// 插入圖片和名稱
									RecordsEcho echo = new RecordsEcho(fileName, recordsShowPane);
									echo.writeImage(matcher1.group(), fileName);

									// 換行
									Document document = recordsShowPane.getDocument();

									try {
										document.insertString(document.getLength(), "\n", new SimpleAttributeSet());
									} catch (BadLocationException e) {
										// TODO Auto-generated catch block
										e.printStackTrace();
									}

									// 標(biāo)記不是第一次了
									oneFind = true;

								} else { // 不是第一次找到就直接寫入

									Document document = recordsShowPane.getDocument();

									try {
										document.insertString(document.getLength(), date + "\n",
												new SimpleAttributeSet());

										RecordsEcho echo = new RecordsEcho(fileName, recordsShowPane);
										echo.writeImage(matcher1.group(), fileName);

										document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

									} catch (BadLocationException e) {
										// TODO Auto-generated catch block
										e.printStackTrace();
									}
								}

							}

						} else { // 文件的情況

							// 第一次找到
							if (!oneFind) {

								// 清空并寫入日期
								recordsShowPane.setText(date + "\n");

								// 插入文件圖片以及名稱
								RecordsEcho echo = new RecordsEcho(fileName, recordsShowPane);
								echo.writeFile(matcher1.group(), fileName);

								// 換行
								Document document = recordsShowPane.getDocument();

								try {
									document.insertString(document.getLength(), "\n", new SimpleAttributeSet());
								} catch (BadLocationException e) {
									// TODO Auto-generated catch block
									e.printStackTrace();
								}

								oneFind = true;

							} else { // 不是第一次找到
								Document document = recordsShowPane.getDocument();

								try {
									document.insertString(document.getLength(), date + "\n", new SimpleAttributeSet());

									RecordsEcho echo = new RecordsEcho(fileName, recordsShowPane);
									echo.writeFile(matcher1.group(), fileName);

									document.insertString(document.getLength(), "\n", new SimpleAttributeSet());

								} catch (BadLocationException e) {
									// TODO Auto-generated catch block
									e.printStackTrace();
								}
							}
						}

					} else { // 查找的是文本
						
						String s = "";
						
						for(int i = 0; i < matcher.group().length(); i++) {
							
							//因為查找到的字符串包含日期，所以要從20開始
							if(i>20 && (i-20) % 30 == 0)
								s += "\n";
							
							s += matcher.group().charAt(i);
							
							
							
						}
						
						if (!oneFind) {
								
							recordsShowPane.setText(s);
							oneFind = true;
							
							
						} else {
							Document document = recordsShowPane.getDocument();

							try {
								document.insertString(document.getLength(), s, new SimpleAttributeSet());
							} catch (BadLocationException e) {
								// TODO Auto-generated catch block
								e.printStackTrace();
							}
						}
					}

				}

				// 找不到的情況
				if (!isExist)
					recordsShowPane.setText("\n\n\n               無相關(guān)記錄！");

			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} finally {
				try {
					bufferedReader.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				try {
					fileReader.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

		}

		else { // 查找為空的情況
			recordsShowPane.setText("\n\n\n               無相關(guān)記錄！");
		}

	}
}

十、清空歷史記

錄點擊清空歷史記錄，所有信息都會被刪除，包括本地信息。

清空歷史信息

package function;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

import javax.swing.JTextPane;

/**
 * 該類實現(xiàn)清空歷史記錄的功能
 * 
 * @author 360°順滑
 * 
 * @date 2020/05/03
 *
 */
public class ClearRecords {

	private JTextPane textShowPane;

	private JTextPane recordsShowPane;
	
	private String userName;
	
	public ClearRecords(String userName,JTextPane textShowPane,JTextPane recordsShowPane) {
		this.userName = userName;
		this.textShowPane = textShowPane;
		this.recordsShowPane = recordsShowPane;
	}

	//把展示面板、輸入面板、本地信息全部清空
	public void clear() {

		textShowPane.setText("");

		recordsShowPane.setText("");

		String path = "src/txt/" + userName + ".txt";

		File file = new File(path);

		FileWriter fileWriter = null;
		BufferedWriter bufferedWriter = null;
		try {
			fileWriter = new FileWriter(file);
			bufferedWriter = new BufferedWriter(fileWriter);
			bufferedWriter.write("");;
			bufferedWriter.flush();

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			if (bufferedWriter != null) {
				try {
					bufferedWriter.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

			if (fileWriter != null) {
				try {
					fileWriter.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		}
	}
}

十一、拖拽輸入文本、圖片和文件

通過拖拽將文本信息（復(fù)制粘貼）、圖片文件路徑輸入到輸入框中，發(fā)送后可以顯示圖片文件。同時，拖拽可以同時拖多個文件。

拖拽輸入文本文件

package function;

import java.awt.datatransfer.DataFlavor;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DropTargetDragEvent;
import java.awt.dnd.DropTargetDropEvent;
import java.awt.dnd.DropTargetEvent;
import java.awt.dnd.DropTargetListener;
import java.io.File;
import java.util.List;

import javax.swing.JTextPane;
import javax.swing.text.Document;
import javax.swing.text.SimpleAttributeSet;

/**
 * 該類實現(xiàn)拖拽文件，復(fù)制粘貼功能
 * 
 * 由于該功能第一次實現(xiàn)，所以部分代碼是搬磚過來的
 * 
 * @author 360°順滑
 *
 * @date 2020/05/03
 */
public class DropTargetFile implements DropTargetListener {

	/** 用于顯示拖拽數(shù)據(jù)的面板 */
  private JTextPane inputPane;

  public DropTargetFile(JTextPane inputPane) {
    this.inputPane = inputPane;
  }

  public void dragEnter(DropTargetDragEvent dtde) {
  	
  }

  public void dragOver(DropTargetDragEvent dtde) {

  }

  public void dragExit(DropTargetEvent dte) {

  }

  public void dropActionChanged(DropTargetDragEvent dtde) {

  }

  public void drop(DropTargetDropEvent dtde) {
  	
    boolean isAccept = false;

    try {
      /*
                * 判斷拖拽目標(biāo)是否支持文件列表數(shù)據(jù)（即拖拽的是否是文件或文件夾, 支持同時拖拽多個）
       */
      if (dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {
        // 接收拖拽目標(biāo)數(shù)據(jù)
        dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);
        isAccept = true;

        // 以文件集合的形式獲取數(shù)據(jù)
        @SuppressWarnings("unchecked")
				List<File> files = (List<File>) dtde.getTransferable().getTransferData(DataFlavor.javaFileListFlavor);

        // 把文件路徑輸出到文本區(qū)域
        if (files != null && files.size() > 0) {
          StringBuilder filePaths = new StringBuilder();
          for (File file : files) {
            filePaths.append(file.getAbsolutePath() + "\n");
          }
          
          Document document = inputPane.getDocument();
          
          document.insertString(document.getLength(), filePaths.toString(), new SimpleAttributeSet());
        }
      }


    } catch (Exception e) {
      e.printStackTrace();
    }

    // 如果此次拖拽的數(shù)據(jù)是被接受的, 則必須設(shè)置拖拽完成（否則可能會看到拖拽目標(biāo)返回原位置, 造成視覺上以為是不支持拖拽的錯誤效果）
    if (isAccept) {
      dtde.dropComplete(true);
    }
  }	
}

~~功能基本就是這樣了，還是有許多bug，但改不動了，后續(xù)有時間有機會再改進(jìn)吧?。?！~~

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