package net.kitbox.util;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.Toolkit;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.ImagingOpException;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import javax.imageio.ImageIO;
/**
 * author:lldy
 * time:2012-5-6下午6:37:18
 * 圖片處理工具類：<br>
 * 功能：縮放圖像、切割圖像、圖像類型轉(zhuǎn)換、彩色轉(zhuǎn)黑白、文字水印、圖片水印等
 */
public class ImageUtils {
    /**
     * 相對于圖片的位置
     */
    private static final int POSITION_UPPERLEFT=0;
    private static final int POSITION_UPPERRIGHT=10;
    private static final int POSITION_LOWERLEFT=1;
    private static final int POSITION_LOWERRIGHT=11;
    /**
     * 幾種常見的圖片格式
     */
    public static String IMAGE_TYPE_GIF = "gif";// 圖形交換格式
    public static String IMAGE_TYPE_JPG = "jpg";// 聯(lián)合照片專家組
    public static String IMAGE_TYPE_JPEG = "jpeg";// 聯(lián)合照片專家組
    public static String IMAGE_TYPE_BMP = "bmp";// 英文Bitmap（位圖）的簡寫，它是Windows操作系統(tǒng)中的標準圖像文件格式
    public static String IMAGE_TYPE_PNG = "png";// 可移植網(wǎng)絡圖形
    private static ImageUtils instance;
    private ImageUtils() {
        instance = this;
    }
    /**
     * 獲取實例
     * @return
     */
    public static ImageUtils getInstance() {
        if (instance == null) {
            instance = new ImageUtils();
        }
        return instance;
    }
    public  BufferedImage image2BufferedImage(Image image){
        System.out.println(image.getWidth(null));
        System.out.println(image.getHeight(null));
        BufferedImage bufferedImage = new BufferedImage(image.getWidth(null), image.getHeight(null), BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = bufferedImage.createGraphics();
        g.drawImage(image, null, null);
        g.dispose();
        System.out.println(bufferedImage.getWidth());
        System.out.println(bufferedImage.getHeight());
        return bufferedImage;
    }
    /**
     * 縮放并轉(zhuǎn)換格式后保存
     * @param srcPath源路徑
     * @param destPath目標路徑
     * @param width：目標寬
     * @param height：目標高
     * @param format：文件格式
     * @return
     */
    public static boolean scaleToFile(String srcPath, String destPath, int width,  int height,String format) {
        boolean flag = false;
        try {
            File file = new File(srcPath);
            File destFile = new File(destPath);
            if (!destFile.getParentFile().exists()) {
                destFile.getParentFile().mkdir();
            }
            BufferedImage src = ImageIO.read(file); // 讀入文件
            Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT);
            BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 繪制縮小后的圖
            g.dispose();
            flag = ImageIO.write(tag, format, new FileOutputStream(destFile));// 輸出到文件流
        } catch (IOException e) {
            e.printStackTrace();
        }
        return flag;
    }
    /**
     * 縮放Image，此方法返回源圖像按百分比縮放后的圖像
     * @param inputImage
     * @param percentage 百分比 允許的輸入0<percentage<10000
     * @return
     */
    public static BufferedImage scaleByPercentage(BufferedImage inputImage,int percentage){
        //允許百分比
        if(0>percentage||percentage>10000){
            throw new ImagingOpException("Error::不合法的參數(shù):percentage->"+percentage+",percentage應該大于0~小于10000");
        }      
        //獲取原始圖像透明度類型
        int type = inputImage.getColorModel().getTransparency();
        //獲取目標圖像大小
        int w=inputImage.getWidth()*percentage;
        int h=inputImage.getHeight()*percentage;
        //開啟抗鋸齒
        RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_ANTIALIAS_ON);
        //使用高質(zhì)量壓縮
        renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);
        BufferedImage img = new BufferedImage(w, h, type);
        Graphics2D graphics2d =img.createGraphics();
        graphics2d.setRenderingHints(renderingHints);       
        graphics2d.drawImage(inputImage, 0, 0, w, h, 0, 0, inputImage
                .getWidth(), inputImage.getHeight(), null);
        graphics2d.dispose();
        return img;
        /*此代碼將返回Image類型
        return inputImage.getScaledInstance(inputImage.getWidth()*percentage,
                inputImage.getHeight()*percentage, Image.SCALE_SMOOTH);
        */
    }
    /**
     * 縮放Image，此方法返回源圖像按給定最大寬度限制下按比例縮放后的圖像
     * @param inputImage
     * @param maxWidth：壓縮后允許的最大寬度
     * @param maxHeight：壓縮后允許的最大高度
     * @throws java.io.IOException
     * return
     */
    public static BufferedImage scaleByPixelRate(BufferedImage inputImage, int maxWidth, int maxHeight) throws Exception {
        //獲取原始圖像透明度類型
        int type = inputImage.getColorModel().getTransparency();
        int width = inputImage.getWidth();
        int height = inputImage.getHeight();
        int newWidth = maxWidth;
        int newHeight =maxHeight;
        //如果指定最大寬度超過比例
        if(width*maxHeight<height*maxWidth){
            newWidth=(int)(newHeight*width/height) ;
        }
        //如果指定最大高度超過比例
        if(width*maxHeight>height*maxWidth){
            newHeight=(int)(newWidth*height/width);
        }
        //開啟抗鋸齒
        RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_ANTIALIAS_ON);
        //使用高質(zhì)量壓縮
        renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);
        BufferedImage img = new BufferedImage(newWidth, newHeight, type);
        Graphics2D graphics2d =img.createGraphics();
        graphics2d.setRenderingHints(renderingHints);       
        graphics2d.drawImage(inputImage, 0, 0, newWidth, newHeight, 0, 0, width, height, null);
        graphics2d.dispose();
        return img;
    }
    /**
     * 縮放Image，此方法返回源圖像按給定寬度、高度限制下縮放后的圖像
     * @param inputImage
     * @param maxWidth：壓縮后寬度
     * @param maxHeight：壓縮后高度
     * @throws java.io.IOException
     * return
     */
    public static BufferedImage scaleByPixel(BufferedImage inputImage, int newWidth, int newHeight) throws Exception {
        //獲取原始圖像透明度類型
        int type = inputImage.getColorModel().getTransparency();
        int width = inputImage.getWidth();
        int height = inputImage.getHeight();
        //開啟抗鋸齒
        RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_ANTIALIASING,
                RenderingHints.VALUE_ANTIALIAS_ON);
        //使用高質(zhì)量壓縮
        renderingHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
        BufferedImage img = new BufferedImage(newWidth, newHeight, type);
        Graphics2D graphics2d =img.createGraphics();
        graphics2d.setRenderingHints(renderingHints);       
        graphics2d.drawImage(inputImage, 0, 0, newWidth, newHeight, 0, 0, width, height, null);
        graphics2d.dispose();
        return img;
    }
    /**
     * 切割圖像，返回指定范圍的圖像
     * @param inputImage
     * @param x 起點橫坐標
     * @param y 起點縱坐標
     * @param width 切割圖片寬度:如果寬度超出圖片，將改為圖片自x剩余寬度
     * @param height 切割圖片高度：如果高度超出圖片，將改為圖片自y剩余高度
     * @param fill 指定目標圖像大小超出時是否補白，如果true，則表示補白；false表示不補白，此時將重置目標圖像大小
     * @return
     */
    public static BufferedImage cut(BufferedImage inputImage,int x,int y,int width,int height,boolean fill){
        //獲取原始圖像透明度類型
        int type = inputImage.getColorModel().getTransparency();
        int w = inputImage.getWidth();
        int h = inputImage.getHeight();
        int endx=x+width;
        int endy=y+height;
        if(x>w)
            throw new ImagingOpException("起點橫坐標超出源圖像范圍");
        if(y>h)
            throw new ImagingOpException("起點縱坐標超出源圖像范圍");
        BufferedImage img;
        //補白
        if(fill){
            img = new BufferedImage(width, height, type);
            //寬度超出限制
            if((w-x)<width){
                width=w-x;
                endx=w;
            }
            //高度超出限制
            if((h-y)<height){
                height=h-y;
                endy=h;
            }
        //不補
        }else{
            //寬度超出限制
            if((w-x)<width){
                width=w-x;
                endx=w;
            }
            //高度超出限制
            if((h-y)<height){
                height=h-y;
                endy=h;
            }
            img = new BufferedImage(width, height, type); 
        }
        //開啟抗鋸齒
        RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_ANTIALIAS_ON);
        //使用高質(zhì)量壓縮
        renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);
        Graphics2D graphics2d =img.createGraphics();
        graphics2d.setRenderingHints(renderingHints);       
        graphics2d.drawImage(inputImage, 0, 0, width, height, x, y, endx, endy, null);
        graphics2d.dispose();
        return img;
    }
    /**
     * 切割圖像，返回指定起點位置指定大小圖像
     * @param inputImage
     * @param startPoint 起點位置：左上：0、右上:10、左下:1、右下:11
     * @param width 切割圖片寬度
     * @param height 切割圖片高度
     * @param fill 指定目標圖像大小超出時是否補白，如果true，則表示補白；false表示不補白，此時將重置目標圖像大小
     * @return
     */
    public static BufferedImage cut(BufferedImage inputImage,int startPoint,int width,int height,boolean fill){
        //獲取原始圖像透明度類型
        int type = inputImage.getColorModel().getTransparency();
        int w = inputImage.getWidth();
        int h = inputImage.getHeight();
        BufferedImage img;
        //補白
        if(fill){
            img = new BufferedImage(width, height, type);
            if(width>w)
                width=w;
            if(height>h)
                height=h;
        //不補
        }else{
            if(width>w)
                width=w;
            if(height>h)
                height=h;
            img = new BufferedImage(width, height, type);
        }
        //開啟抗鋸齒
        RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_ANTIALIAS_ON);
        //使用高質(zhì)量壓縮
        renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);      
        Graphics2D graphics2d =img.createGraphics();
        graphics2d.setRenderingHints(renderingHints);
        switch(startPoint){
                //右上
            case POSITION_UPPERRIGHT:
                graphics2d.drawImage(inputImage, w-width, 0, w, height, 0, 0, width, height, null);
                break;
                //左下
            case POSITION_LOWERLEFT:
                graphics2d.drawImage(inputImage, 0, h-height, width, h, 0, 0, width, height, null);  
                break;
                //右下
            case POSITION_LOWERRIGHT:
                graphics2d.drawImage(inputImage, w-width, h-height, w, h, 0, 0, width, height, null);
                break;
                //默認左上
            case POSITION_UPPERLEFT:
            default:
                graphics2d.drawImage(inputImage, 0, 0, width, height, 0, 0, width, height, null);
        }
        graphics2d.dispose();
        return img;
    }
    /**
     * 以指定角度旋轉(zhuǎn)圖片：使用正角度 theta 進行旋轉(zhuǎn)，可將正 x 軸上的點轉(zhuǎn)向正 y 軸。
     * @param inputImage
     * @param degree 角度:以度數(shù)為單位
     * @return
     */
    public static BufferedImage rotateImage(final BufferedImage inputImage,
            final int degree) {
        int w = inputImage.getWidth();
        int h = inputImage.getHeight();
        int type = inputImage.getColorModel().getTransparency();
        BufferedImage img=new BufferedImage(w, h, type);
        Graphics2D graphics2d =img.createGraphics();
        //開啟抗鋸齒
        RenderingHints renderingHints=new RenderingHints(RenderingHints.KEY_INTERPOLATION,
                RenderingHints.VALUE_ANTIALIAS_ON);
        //使用高質(zhì)量壓縮
        renderingHints.put(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_RENDER_QUALITY);
        graphics2d.setRenderingHints(renderingHints);
        graphics2d.rotate(Math.toRadians(degree), w / 2, h / 2);
        graphics2d.drawImage(inputImage, 0, 0, null);
        graphics2d.dispose();
        return img;
    }
    /**
     * 水平翻轉(zhuǎn)圖像
     *
     * @param bufferedimage 目標圖像
     * @return
     */
    public static BufferedImage flipHorizontalImage(final BufferedImage inputImage) {
        int w = inputImage.getWidth();
        int h = inputImage.getHeight();
        BufferedImage img;
        Graphics2D graphics2d;
        (graphics2d = (img = new BufferedImage(w, h, inputImage
                .getColorModel().getTransparency())).createGraphics())
                .drawImage(inputImage, 0, 0, w, h, w, 0, 0, h, null);
        graphics2d.dispose();
        return img;
    }
    /**
     * 豎直翻轉(zhuǎn)圖像
     *
     * @param bufferedimage 目標圖像
     * @return
     */
    public static BufferedImage flipVerticalImage(final BufferedImage inputImage) {
        int w = inputImage.getWidth();
        int h = inputImage.getHeight();
        BufferedImage img;
        Graphics2D graphics2d;
        (graphics2d = (img = new BufferedImage(w, h, inputImage
                .getColorModel().getTransparency())).createGraphics())
                .drawImage(inputImage, 0, 0, w, h, 0, h, w, 0, null);
        graphics2d.dispose();
        return img;
    }  
    /**
     * 圖片水印
     *
     * @param inputImage
     *            待處理圖像
     * @param markImage
     *            水印圖像
     * @param x
     *            水印位于圖片左上角的 x 坐標值
     * @param y
     *            水印位于圖片左上角的 y 坐標值
     * @param alpha
     *            水印透明度 0.1f ~ 1.0f
     * */
    public static BufferedImage waterMark(BufferedImage inputImage,BufferedImage markImage, int x, int y,
                    float alpha) {
            BufferedImage image = new BufferedImage(inputImage.getWidth(), inputImage
                            .getHeight(), BufferedImage.TYPE_INT_ARGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(inputImage, 0, 0, null);
            // 加載水印圖像
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                            alpha));
            g.drawImage(markImage, x, y, null);
            g.dispose();
            return image;
    }
    /**
     * 文字水印
     *
     * @param inputImage
     *            待處理圖像
     * @param text
     *            水印文字
     * @param font
     *            水印字體信息
     * @param color
     *            水印字體顏色
     * @param x
     *            水印位于圖片左上角的 x 坐標值
     * @param y
     *            水印位于圖片左上角的 y 坐標值
     * @param alpha
     *            水印透明度 0.1f ~ 1.0f
     */
    public static BufferedImage textMark(BufferedImage inputImage, String text, Font font,
                    Color color, int x, int y, float alpha) {
            Font dfont = (font == null) ? new Font("宋體", 20, 13) : font;
            BufferedImage image = new BufferedImage(inputImage.getWidth(), inputImage
                            .getHeight(), BufferedImage.TYPE_INT_ARGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(inputImage, 0, 0, null);
            g.setColor(color);
            g.setFont(dfont);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                            alpha));
            g.drawString(text, x, y);
            g.dispose();
            return image;
    } 
    /**
     * 圖像彩色轉(zhuǎn)黑白色
     * @param inputImage
     * @return 轉(zhuǎn)換后的BufferedImage
     */
    public final static BufferedImage toGray(BufferedImage inputImage)
    {
            ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
            //對源 BufferedImage 進行顏色轉(zhuǎn)換。如果目標圖像為 null，
            //則根據(jù)適當?shù)?ColorModel 創(chuàng)建 BufferedImage。
            ColorConvertOp op = new ColorConvertOp(cs, null);
            return op.filter(inputImage, null);
    }
    /**
     * 圖像彩色轉(zhuǎn)為黑白
     * @param srcImageFile
     *            源圖像地址
     * @param destImageFile
     *            目標圖像地址
     * @param formatType
     *              目標圖像格式：如果formatType為null;將默認轉(zhuǎn)換為PNG
     */
    public final static void toGray(String srcImageFile, String destImageFile,String formatType)
    {
        try
        {
            BufferedImage src = ImageIO.read(new File(srcImageFile));
            ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
            ColorConvertOp op = new ColorConvertOp(cs, null);
            src = op.filter(src, null);
            //如果formatType為null;將默認轉(zhuǎn)換為PNG
            if(formatType==null){
                formatType="PNG";
            }
            ImageIO.write(src,formatType,new File(destImageFile));
        } catch (IOException e)
        {
            e.printStackTrace();
        }
    }
    /**
     * 圖像類型轉(zhuǎn)換：GIF->JPG、GIF->PNG、PNG->JPG、PNG->GIF(X)、BMP->PNG
     *
     * @param inputImage
     *            源圖像地址
     * @param formatType
     *            包含格式非正式名稱的 String：如JPG、JPEG、GIF等
     * @param destImageFile
     *            目標圖像地址
     */
    public final static void convert(BufferedImage inputImage, String formatType,String destImageFile)
    {
        try
        {
            ImageIO.write(inputImage, formatType, new File(destImageFile));
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }
    /**
     * 圖像切割（指定切片的行數(shù)和列數(shù)）
     *
     * @param srcImageFile
     *            源圖像地址
     * @param destDir
     *            切片目標文件夾
     * @param formatType
     *              目標格式
     * @param rows
     *            目標切片行數(shù)。默認2，必須是范圍 [1, 20] 之內(nèi)
     * @param cols
     *            目標切片列數(shù)。默認2，必須是范圍 [1, 20] 之內(nèi)
     */
    public final static void cut(BufferedImage inputImage, String destDir,
            String formatType,int rows, int cols)
    {
        try
        {
            if (rows <= 0 || rows > 20)
                rows = 2; // 切片行數(shù)
            if (cols <= 0 || cols > 20)
                cols = 2; // 切片列數(shù)
            // 讀取源圖像
            //BufferedImage bi = ImageIO.read(new File(srcImageFile));
            int w = inputImage.getHeight(); // 源圖寬度
            int h = inputImage.getWidth(); // 源圖高度
            if (w > 0 && h > 0)
            {
                Image img;
                ImageFilter cropFilter;
                Image image = inputImage.getScaledInstance(w, h,
                        Image.SCALE_DEFAULT);
                int destWidth = w; // 每張切片的寬度
                int destHeight = h; // 每張切片的高度
                // 計算切片的寬度和高度
                if (w % cols == 0)
                {
                    destWidth = w / cols;
                } else
                {
                    destWidth = (int) Math.floor(w / cols) + 1;
                }
                if (h % rows == 0)
                {
                    destHeight = h / rows;
                } else
                {
                    destHeight = (int) Math.floor(h / rows) + 1;
                }
                // 循環(huán)建立切片
                // 改進的想法:是否可用多線程加快切割速度
                for (int i = 0; i < rows; i++)
                {
                    for (int j = 0; j < cols; j++)
                    {
                        // 四個參數(shù)分別為圖像起點坐標和寬高
                        // 即: CropImageFilter(int x,int y,int width,int height)
                        cropFilter = new CropImageFilter(j * destWidth, i
                                * destHeight, destWidth, destHeight);
                        img = Toolkit.getDefaultToolkit().createImage(
                                new FilteredImageSource(image.getSource(),
                                        cropFilter));
                        BufferedImage tag = new BufferedImage(destWidth,
                                destHeight, BufferedImage.TYPE_INT_ARGB);
                        Graphics g = tag.getGraphics();
                        g.drawImage(img, 0, 0, null); // 繪制縮小后的圖
                        g.dispose();
                        // 輸出為文件
                        ImageIO.write(tag, formatType, new File(destDir + "_r" + i
                                + "_c" + j + "."+formatType.toLowerCase()));
                    }
                }
            }
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }
    /**
     * 給圖片添加文字水印
     *
     * @param pressText
     *            水印文字
     * @param srcImageFile
     *            源圖像地址
     * @param destImageFile
     *            目標圖像地址
     * @param fontName
     *            水印的字體名稱
     * @param fontStyle
     *            水印的字體樣式
     * @param color
     *            水印的字體顏色
     * @param fontSize
     *            水印的字體大小
     * @param x
     *            修正值
     * @param y
     *            修正值
     * @param alpha
     *            透明度：alpha 必須是范圍 [0.0, 1.0] 之內(nèi)（包含邊界值）的一個浮點數(shù)字
     * @param formatType
     *              目標格式
     */
    public final static void pressText(String pressText, String srcImageFile,
            String destImageFile, String fontName, int fontStyle, Color color,
            int fontSize, int x, int y, float alpha,String formatType)
    {
        try
        {
            File img = new File(srcImageFile);
            Image src = ImageIO.read(img);
            int width = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_ARGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(src, 0, 0, width, height, null);
            g.setColor(color);
            g.setFont(new Font(fontName, fontStyle, fontSize));
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));
            // 在指定坐標繪制水印文字
            g.drawString(pressText, (width - (getLength(pressText) * fontSize))
                    / 2 + x, (height - fontSize) / 2 + y);
            g.dispose();
            ImageIO.write((BufferedImage) image, formatType,
                    new File(destImageFile));// 輸出到文件流
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }
    /**
     * 給圖片添加圖片水印
     *
     * @param pressImg
     *            水印圖片
     * @param srcImageFile
     *            源圖像地址
     * @param destImageFile
     *            目標圖像地址
     * @param x
     *            修正值。 默認在中間
     * @param y
     *            修正值。 默認在中間
     * @param alpha
     *            透明度：alpha 必須是范圍 [0.0, 1.0] 之內(nèi)（包含邊界值）的一個浮點數(shù)字
     * @param formatType
     *              目標格式
     */
    public final static void pressImage(String pressImg, String srcImageFile,
            String destImageFile, int x, int y, float alpha,String formatType)
    {
        try
        {
            File img = new File(srcImageFile);
            Image src = ImageIO.read(img);
            int wideth = src.getWidth(null);
            int height = src.getHeight(null);
            BufferedImage image = new BufferedImage(wideth, height,
                    BufferedImage.TYPE_INT_ARGB);
            Graphics2D g = image.createGraphics();
            g.drawImage(src, 0, 0, wideth, height, null);
            // 水印文件
            Image src_biao = ImageIO.read(new File(pressImg));
            int wideth_biao = src_biao.getWidth(null);
            int height_biao = src_biao.getHeight(null);
            g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP,
                    alpha));
            g.drawImage(src_biao, (wideth - wideth_biao) / 2,
                    (height - height_biao) / 2, wideth_biao, height_biao, null);
            // 水印文件結(jié)束
            g.dispose();
            ImageIO.write((BufferedImage) image, formatType,
                    new File(destImageFile));
        } catch (Exception e)
        {
            e.printStackTrace();
        }
    }
    /**
     * 計算text的長度（一個中文算兩個字符）
     *
     * @param text
     * @return
     */
    public final static int getLength(String text)
    {
        int length = 0;
        for (int i = 0; i < text.length(); i++)
        {
            if (new String(text.charAt(i) + "").getBytes().length > 1)
            {
                length += 2;
            } else
            {
                length += 1;
            }
        }
        return length / 2;
    }
}