cd/d 路徑地址

vue init webpack 項(xiàng)目名稱

Project name：項(xiàng)目名稱
Project description：項(xiàng)目描述
author：作者
Runtime + Complier： 運(yùn)行時(shí)和編譯器：默認(rèn)第一個(gè)
install router ：是否安裝路由，選擇安裝就后面我安裝步驟就不用執(zhí)行
Use ESLint to lint your code? (Y/n)：問你是否使用eslint限制語法，新手建議否
Set up unit tests (Y/n):單元測試，新手選否
Setup e2e tests with Nightwatch? (Y/n)：使用Nightwatch設(shè)置端到端測試?，選否
Should we run `npm install` for you after the project has been created?：用什么方式運(yùn)行項(xiàng)目：選npm

{
  "name": "項(xiàng)目名稱",
  "version": "0.1.0", // b=版本
  "private": true,
  // 運(yùn)行腳本：serve為啟動(dòng)項(xiàng)目腳本，build為打包項(xiàng)目腳本
  "scripts": {
    "serve": "vue-cli-service serve --open",
    "build": "vue-cli-service build"
  },
  // 安裝的vue依賴文件
  "dependencies": {
    "vue": "^2.6.11",
    // vue-router一般作傳參和頁面跳轉(zhuǎn)使用
    "vue-router": "^3.5.1"
  },
  "devDependencies": {
    "@vue/cli-service": "~4.5.12",
    "vue-template-compiler": "^2.6.11"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not dead"
  ]
}

運(yùn)行
npm run dev
或
npm run serve

vue ui

vue常用指令：
內(nèi)容渲染指令 ————》
{{ 屬性值 }}   別名：插值表達(dá)式
屬性值為自定義的屬性
該指令將數(shù)據(jù)渲染到頁面
例子：
name: "張三" // 自定義屬性
<div>{{ name }}</div>

------------------------------------------------------
屬性渲染指令
v-bind:元素="屬性值"  簡寫方式==>    :元素="屬性"
------------------------------------------------------
事件渲染指令
v-on:事件名  只需要知道v-on:click="方法名" 點(diǎn)擊事件  簡寫:@click="方法名"
------------------------------------------------------
雙向綁定指令
v-model="屬性值"
例如：給input綁定一個(gè)v-model的屬性值，修改input的值，該綁定的屬性值內(nèi)容會(huì)跟
著改變
------------------------------------------------------
條件渲染指令
v-if
v-else-if
v-else
該指令分條件渲染頁面，只有滿足條件的標(biāo)簽才會(huì)被渲染到頁面
完整寫法例子：
name: "張三" // 自定義屬性
// 頁面寫法
<div v-if="name=='張三'">
我的名字是張三</div> // 當(dāng)滿足條件時(shí)該文本會(huì)顯示在頁面

<div v-else>我的名字不是張三</div> // 不滿足條件顯示本文本內(nèi)容

------------------------------------------------------

列表渲染指令
v-for=(item ,index) in list
該指令為渲染集合數(shù)組的指令，通過該指令可以把多條數(shù)據(jù)分批次渲染到界面
item為數(shù)組集合元素的內(nèi)容，index為下標(biāo)
例：
list: [
		{
	name: "xxx",
	age: xx,
	},
	{
	name: "zzz",
	age: zz,
	},
]
當(dāng)下標(biāo)為0時(shí)，item值為list下的
{
	name: "xxx",
	age:xx,
}
需要獲取name屬性值，則在頁面中寫成{{ item.name }}
完整寫法例子：
<div v-for(item,index) in list>
<span>{{ item.name }}</span>
</div>

除了掌握基礎(chǔ)指令外，還需要最起碼掌握以下函數(shù)：
data() {
	return {
		// 在return這里定義自定義的屬性
	}
},
// 在methods定義方法
methods: {
 方法A() {
	
	}
},
// 在created內(nèi)調(diào)用方法，實(shí)現(xiàn)一加載頁面就獲取數(shù)據(jù)，用于增刪改查中的查，來
查詢數(shù)據(jù)
created() {
}

還需要了解：
在main.js這個(gè)入口文件引用npm install 后的組件

// 導(dǎo)入安裝的組件
import 自定義組件名 from "組件路徑（一般在搜索安裝的組件文檔會(huì)有說明）"
Vue.use(自定義組件名) // 引用組件(一般安裝的組件文檔會(huì)有說明)

例:
import Router from "./vue-router"
Vue.use(Router)

運(yùn)行
npm run dev
或
npm run serve

npm install vue-router

npm install axios

npm i element-ui -S

// 導(dǎo)入包
import Vue from 'vue'
import App from './App.vue'
import router from './router'
import ElementUI from 'element-ui'
import axios from 'axios'

Vue.config.productionTip = false
// elementui
Vue.use(ElementUI)
Vue.prototype.$axios = axios

new Vue({
  el: '#app',
  // 路由
  router,
  render: h => h(App),
}).$mount('#app')

import Vue from 'vue'
import Router from 'vue-router'
import Login from '@/components/Login'
import maintry from '@/views/maintry'
import addScore from '@/views/addScore'
import deleteScore from '@/views/deleteScore'
import showScore from '@/views/showScore'
import updateScore from '@/views/updateScore'

// 掛載vue-router
// 將組件添加到router
Vue.use(Router)
export default new Router({
    routes: [
        {
            path: '/',
            redirect: '/login'
        },
        {
            path: '/login',
            name: 'Login',
            component: Login
        },
        {
            path: '/maintry',
            name: 'maintry',
            component: maintry
        },
        {
            path: '/addScore',
            name: 'addScore',
            component: addScore
        },
        {
            path: '/deleteScore',
            name: 'deleteScore',
            component: deleteScore
        },
        {
            path: '/showScore',
            name: 'showScore',
            component: showScore
        },
        {
            path: '/updateScore',
            name: 'updateScore',
            component: updateScore
        }
    ]
})

ps: 需要注意的是，配置好了路由，你還需要在App.vue里進(jìn)行聲明，需要在App.vue
加入<router-view/>代碼

<template>
  <div id="app">
      <router-view/>
  </div>
</template>

<script>

export default {
  name: 'app'
}
</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
    height: 100%;
}
</style>

import axios from 'axios'

// 創(chuàng)建axios實(shí)例
// eslint-disable-next-line no-unused-vars
const service = axios.create({
    // baseURL: '/', // api的base_Url
    // 后端的請求路徑
    baseURL: 'http://localhost:8081/student', // api的base_Url
    timeout: 50000 // 請求超時(shí)時(shí)間
})

// 請求攔截器
axios.interceptors.request.use(
    function (config) {
        // 在發(fā)送請求之前做些什么
        return config
    },
    function (error) {
        // 對(duì)請求錯(cuò)誤做些什么
        return Promise.reject(error)
    }
)

// 響應(yīng)攔截器
axios.interceptors.response.use(
    function (config) {
        // 對(duì)響應(yīng)數(shù)據(jù)做點(diǎn)什么
        return config
    },
    function (error) {
        // 對(duì)響應(yīng)錯(cuò)誤做點(diǎn)什么
        return Promise.reject(error)
    }
)

export default service

// 導(dǎo)入axios配置
import service from '../utils/request'

// 登錄
export function loginTosystem(username, password) {
    return service.get('/login/loginTosystem', {
        headers: { 'Content-Type': 'application/json' },
        params: {
            username: username,
            password: password
        }
    })
}

// 導(dǎo)入axios配置
import service from '../utils/request'

// 注冊賬號(hào)
export function registerAccount (obj) {
    return service.post('/register/registerAccount', JSON.stringify(obj), {
        headers: { 'Content-Type': 'application/json' }
    })
}

// 這里給大家舉一個(gè)例子：
// 登錄和注冊界面以及功能
<template>
    <div v-show="loginShowControll">
<!--        登錄界面-->
        <div v-show="loginShow" id="login_login">
            <el-container>
                <el-header>學(xué)生成績管理系統(tǒng)登錄入口</el-header>
                <el-main>
<!--                    輸入框-->
                    <span id="login_usernameInfo">用戶名:</span>
                    <el-input v-model="username" placeholder="請輸入用戶名" id="login_input_username"></el-input>
                    <span id="login_passwordInfo">密碼:</span>
                    <el-input v-model="password" placeholder="請輸入密碼" id="login_input_password"></el-input>
<!--                    按鈕-->
                    <button type="submit" id="login_submit" @click="loginButton">登錄</button>
                    <button type="submit" id="login_registerButton" @click="registerButton">注冊</button>
                </el-main>
                <el-footer>登錄界面</el-footer>
            </el-container>
        </div>
<!--        注冊界面-->
        <div v-show="registerShow" id="login_register">
            <el-container>
                <el-header>學(xué)生成績管理系統(tǒng)注冊入口<span id="register_return" @click="registerReturn" @mouseover="mouseOver" @mouseleave="mouseLeave" :style="bgc">返回</span></el-header>
                <el-main>
                    <!--                    輸入框-->
                    <span id="register_nameInfo">姓名:</span>
                    <el-input v-model="name" placeholder="請輸入姓名" id="register_input_name"></el-input>
                    <span id="register_usernameInfo">用戶名:</span>
                    <el-input v-model="registerUsername" placeholder="請輸入用戶名" id="register_input_username"></el-input>
                    <span id="register_passwordInfo">密碼:</span>
                    <el-input v-model="registerPassword" placeholder="請輸入用戶名" id="register_input_password"></el-input>
                    <!--                    按鈕-->
                    <button type="submit" id="register_submit" @click="submitButton">提交</button>
                    <button type="submit" id="register_registerButton" @click="resetButton">重置</button>
                </el-main>
                <el-footer>注冊界面</el-footer>
            </el-container>
        </div>
    </div>
</template>
<script>
    import { loginTosystem } from "../api/get";
    import { registerAccount } from "../api/post"

export default {
    name: 'Login',
    data () {
        return {
            loginShowControll: true, // 登錄、注冊界面顯示控制
            loginShow: true, // 登錄界面顯示控制
            registerShow: false, // 注冊界面顯示控制
            username: '', // 用戶名
            password: '', // 密碼
            name: '', // 姓名
            bgc: '', // 鼠標(biāo)懸停變色
            registerUsername: '', // 注冊賬號(hào)
            registerPassword: '' // 注冊密碼
        }
    },
    methods: {
        // 跳轉(zhuǎn)注冊界面
        registerButton () {
            this.loginShow = false
            this.registerShow = true
        },
        // 登錄學(xué)生成績管理系統(tǒng)
        loginButton () {
            if (this.username.trim() == '') {
                alert('請輸入用戶名')
                return
            }
            if (this.password.trim() == '') {
                alert('請輸入密碼')
                return
            }
            loginTosystem(this.username, this.password).then(res => {

                if (res.data.data == null) {
                    alert('賬號(hào)或密碼錯(cuò)誤！')
                } else {
                    alert('登錄成功')
                    this.$router.push({
                        path: '/maintry',
                        // 將username傳到maintry組件，用于獲取登陸人員的姓名
                        query: {username: this.username}
                    })
                }
            })
        },
        // 注冊按鈕
        submitButton () {
            if (this.name = '') {
                alert('請輸入姓名')
                return
            }
            if (this.username = '') {
                alert('請輸入用戶名')
                return
            }
            if (this.password = '') {
                alert('請輸入密碼')
                return
            }
            const obj = {
                username: this.registerUsername,
                password: this.registerPassword,
                name: this.name
            }
           this.registerAccount(obj)
            this.name = ''
            this.registerUsername = ''
            this.registerPassword = ''

        },
        // 注冊信息
        async registerAccount(obj) {
            await registerAccount(obj).then(res => {
                alert(res.data.data)
            })
        },
        // 重置文本
        resetButton () {
            this.name = ''
            this.registerUsername = ''
            this.registerPassword = ''
        },
        // 返回登錄界面
        registerReturn () {
            this.loginShow = true
            this.registerShow = false
        },
        // 鼠標(biāo)懸停變色
        mouseOver () {
            this.bgc = 'background-color: #cccccc;color: red'
        },
        mouseLeave () {
            this.bgc = ''
        }
    },
    watch: {
        // 監(jiān)聽登錄和注冊地方只能使用數(shù)字和英文
        username(newValue, oldValue) {
            this.username = newValue.replace(/[^A-Za-z0-9]/g, '')
        },
        password(newValue, oldValue) {
            this.password = newValue.replace(/[^A-Za-z0-9]/g, '')
        },
        registerUsername (newValue, oldValue) {
            this.registerUsername = newValue.replace(/[^A-Za-z0-9]/g, '')
        },
        registerPassword(newValue, oldValue) {
        this.registerPassword = newValue.replace(/[^A-Za-z0-9]/g, '')
    },
        // 只能輸入漢字
        name(newValue,oldValue) {
            this.name = newValue.replace(/[^\4E00-\u9FA5]/g, '')
        }
    }
}
</script>
<style scoped>
@import "../assets/css/login.css";
</style>

module.exports = {
  publicPath: '/',
  lintOnSave: false,
  devServer: {
    disableHostCheck: true,
    open: true,
    port: 8080,
    proxy: {
      '/': {
        // 連接到后端的路徑
        target: 'http://localhost:8081/student',
        changeOrigin: true,
        secure: false,
        pathRewrite: {
          '^/': '/'
        }
      }
    }
  }
}

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.hxc</groupId>
    <artifactId>com.StudentScoreManage</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.4.5</version>
    </parent>
    <dependencies>
<!--        springboot-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
<!--        mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.26</version>
        </dependency>
<!--        fastjson-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.76</version>
        </dependency>
<!--        mybatis-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.3</version>
        </dependency>
<!--        lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
        </dependency>
<!--        redis-->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.6.0</version>
        </dependency>
    </dependencies>
    <!--    編碼格式-->
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>
    <!--    打包配置-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

package com.StudentScore;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
//聲明springboot
@SpringBootApplication
//定義mapper區(qū)
@MapperScan("com.StudentScore.Mapper")
public class StudentScoreApplication {
    public static void main(String[] args) {
        SpringApplication.run(StudentScoreApplication.class,args);
    }
}

package com.StudentScore.Config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

/**
 * @author hxc
 * @dateTime: 2021-12-2
 * @description: 跨域配置
 * */
@Configuration
public class CorsConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        //設(shè)置允許跨域
        registry.addMapping("/**")
                .allowedOrigins("*")
                // 設(shè)置允許跨域請求的域名
                .allowedOriginPatterns("*")
                //設(shè)置允許的方法
                .allowedMethods("*")
                .maxAge(3600);
    }
}

server:
  port: 8081
  servlet:
# 項(xiàng)目的路徑，配置如下之后，它的路徑為http:locahost:8081/student
    context-path: /student
#    數(shù)據(jù)庫
spring:
  datasource:
    username: root
    url: jdbc:mysql://localhost:3306/mydb
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver

package com.StudentScore.constant;

import lombok.Getter;

@Getter
public enum ResutEnum {
    OK(2000,"成功"),
    Error(5000,"失敗");
    ResutEnum(Integer code,String message){
        this.code = code;
        this.message = message;
    }
    Integer code;
    String message;
}

package com.StudentScore.Vo;

import com.StudentScore.constant.ResutEnum;
import lombok.Getter;
/**
 * @author hxc
 * @dateTime: 2021-12-4
 * @description: 數(shù)據(jù)交互響應(yīng)-提示
 * */
@Getter
public class ResultVo<T> {
    private T data;
    private Integer code;
    private String message;
    public ResultVo(ResutEnum resutEnum) {
        this.code = resutEnum.getCode();
        this.message = resutEnum.getMessage();
        data = null;
    }
    public ResultVo(ResutEnum resutEnum,T data) {
        this.code = resutEnum.getCode();
        this.message = resutEnum.getMessage();
        this.data = data;
    }
    public ResultVo(Integer code,String message,T data){
        this.code = code;
        this.message = message;
        this.data = data;
    }
}

package com.StudentScore.Controller;

import com.StudentScore.Service.LoginService;
import com.StudentScore.Vo.ResultVo;
import com.StudentScore.constant.ResutEnum;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;

/**
 * @author hxc
 * @dateTime: 2021-12-2
 * @description: 登錄Controller
 * */
@RestController
@RequestMapping("/login/**")
public class LoginController {
    @Resource
    private LoginService loginService;

    // 登錄到系統(tǒng)
    @GetMapping("/loginTosystem")
    public ResultVo loginTosystem(@RequestParam("username")String username, @RequestParam("password")String password) {
        return new ResultVo(ResutEnum.OK,loginService.loginTosystem(username,password));
    }
    @GetMapping("/findName")
    public ResultVo findName(@RequestParam("username")String username) {
        return new ResultVo(ResutEnum.OK,loginService.findName(username));
    }
}

package com.StudentScore.Controller;

import com.StudentScore.Service.RegisterService;
import com.StudentScore.Vo.ResultVo;
import com.StudentScore.constant.ResutEnum;
import com.StudentScore.dto.Account;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

/**
 * @author hxc
 * @dateTime: 2021-12-2
 * @description: 注冊Controller
 * */
@RestController
@RequestMapping("/register/**")
public class RegisterController {
    @Resource
    private RegisterService registerService;

    // 注冊
    @PostMapping("/registerAccount")
    public ResultVo registerAccount(@RequestBody Account account) {
        return new ResultVo(ResutEnum.OK,registerService.registerAccount(account));
    }
}

package com.StudentScore.dto;

import lombok.Data;

/**
 * @author hxc
 * @dateTime: 2021-12-2
 * @description: 賬號(hào)登錄注冊實(shí)體
 * */
@Data
public class Account {
    private String id;
    // 姓名
    private String name;
    // 賬號(hào)
    private String username;
    // 密碼
    private String password;
}

package com.StudentScore.Service;

import com.StudentScore.Mapper.LoginMapper;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

/**
 * @author hxc
 * @dateTime: 2021-12-2
 * @description: 登錄service
 * */
@Service
public class LoginService {
@Resource
    private LoginMapper loginMapper;
    // 登錄
    public String loginTosystem(String username,String password){
        String message = "";
        // 判斷登錄的角色是否為空
        if(loginMapper.loginTosystem(username,password)== null) {
            message = "登錄失敗";
        }else {
            loginMapper.loginTosystem(username,password);
            message = "登錄成功";
        }
       return message;
    }

    // 獲取登錄人員的姓名
    public String findName(String username) {
        return loginMapper.findName(username);
    }
}

package com.StudentScore.Service;

import com.StudentScore.Mapper.RegisterMapper;
import com.StudentScore.dto.Account;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

/**
 * @author hxc
 * @dateTime:2021-12-2
 * @description: 注冊service
 * */
@Service
public class RegisterService {
    @Resource
    private RegisterMapper registerMapper;

    // 注冊
    public String registerAccount(Account account) {
        registerMapper.registerAccount(account);
        return "注冊成功";
    }
}

package com.StudentScore.Mapper;

import org.apache.ibatis.annotations.Param;

/**
 * @author hxc
 * @dateTime: 2021-12-2
 * @description: 登錄mapper
 * */
public interface LoginMapper {
    // 登錄
    String loginTosystem(@Param("username")String username, @Param("password")String password);
    // 獲取登錄的人的姓名
    String findName(@Param("username")String username);
}

package com.StudentScore.Mapper;

import com.StudentScore.dto.Account;
import org.apache.ibatis.annotations.Param;

/**
 * @author hxc
 * @dateTime: 2021-12-2
 * @description: 注冊mapper
 * */
public interface RegisterMapper {
    // 注冊
    void registerAccount(@Param("account")Account account);
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
        <!-- 映射的mapper層-->
<mapper namespace="com.StudentScore.Mapper.LoginMapper">

    <select id="loginTosystem" resultType="java.lang.String">
        select username,password from scorelogin where username=#{username} and password=#{password}
    </select>
    <select id="findName" resultType="java.lang.String">
        select name from scorelogin where username=#{username}
    </select>
</mapper>

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.StudentScore.Mapper.RegisterMapper">
<!--useGeneratedKeys="true" keyProperty="id"代表使用自增，自增的對(duì)象是id -->
    <insert id="registerAccount" parameterType="com.StudentScore.dto.Account" useGeneratedKeys="true" keyProperty="id">
        insert into scorelogin (name,username,password) values (#{account.name},#{account.username},#{account.password})
    </insert>
</mapper>