08-基于JSP&Session&Cookie的学生管理系统

基于JSP&Session&Cookie的学生管理系统

因为本次系统仅作为练手和熟悉基本的MVC编程，所以仅供参考

1、环境准备

1.0、项目配置文件准备

• WEB-INF/web.xml

  • <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
    	version="4.0">
     
    	<!--项目默认打开的首页配置-->
    	<welcome-file-list>
    		<welcome-file>login.jsp</welcome-file>
    	</welcome-file-list>
    </web-app>

• pom.xml

  • <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.coolman</groupId>  
      <artifactId>_03StudentManagerSystemBaseOnJSPAndTomcat</artifactId>  
      <version>1.0-SNAPSHOT</version>  
      <packaging>war</packaging>
     
      <properties> 
        <maven.compiler.source>8</maven.compiler.source>  
        <maven.compiler.target>8</maven.compiler.target> 
      </properties>
     
    <!--  导入jar包-->
      <dependencies>
    <!--    数据访问层
      mysql：
      mybatis：
        Mybatis的日志配置
    -->
        <!--mysql-->
        <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>8.0.22</version>
        </dependency>
     
        <!-- mybatis -->
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.5.5</version>
        </dependency>
     
        <!--MyBatis日志配置-->
        <!-- 添加slf4j日志api -->
        <dependency>
          <groupId>org.slf4j</groupId>
          <artifactId>slf4j-api</artifactId>
          <version>1.7.20</version>
        </dependency>
     
        <!-- 添加logback-classic依赖 -->
        <dependency>
          <groupId>ch.qos.logback</groupId>
          <artifactId>logback-classic</artifactId>
          <version>1.2.3</version>
        </dependency>
     
        <!-- 添加logback-core依赖 -->
        <dependency>
          <groupId>ch.qos.logback</groupId>
          <artifactId>logback-core</artifactId>
          <version>1.2.3</version>
        </dependency>
    <!--
      逻辑业务层
        servlet
        jsp
          jstl
    -->
        <!-- servlet -->
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
          <scope>provided</scope>
        </dependency>
     
        <!-- jsp -->
        <dependency>
          <groupId>javax.servlet.jsp</groupId>
          <artifactId>jsp-api</artifactId>
          <version>2.2</version>
          <scope>provided</scope>
        </dependency>
     
        <!-- jstl -->
        <dependency>
          <groupId>jstl</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
        </dependency>
     
          <dependency>
              <groupId>commons-beanutils</groupId>
              <artifactId>commons-beanutils</artifactId>
              <version>1.9.1</version>
          </dependency>
      </dependencies>
     
      <!-- tomcat7-maven-plugin插件 -->
        <build>
            <plugins>
                <plugin>
                    <!--Maven直接启动Tomcat的插件-->
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.2</version>
                    <configuration>
                        <!--Tomcat7的插件的配置-->
                        <port>80</port>   <!--配置端口号-->
                        <path>/</path>  <!--配置项目路径-->
                        <!--Tomcat的get请求在8版本以下会出现中文乱码的问题，需要在这里配置-->
                        <uriEncoding>UTF-8</uriEncoding>
                    </configuration>
                </plugin>
            </plugins>
        </build>
     
    </project>
     

1.1、数据库准备

• 因为设计的比较简单，只要登录用户和学生信息，大家可以自行设计数据库，并导入自定义数据

1.2、实体类准备

• User类

  • package com.coolman.pojo;
     
    public class User {
        private int id;
        private String name;
        private String phoneNumber;
        private String password;
     
     
        public User() {
        }
     
        public User(int id, String name, String phoneNumber, String password) {
            this.id = id;
            this.name = name;
            this.phoneNumber = phoneNumber;
            this.password = password;
        }
     
        /**
         * 获取
         * @return id
         */
        public int getId() {
            return id;
        }
     
        /**
         * 设置
         * @param id
         */
        public void setId(int id) {
            this.id = id;
        }
     
        /**
         * 获取
         * @return name
         */
        public String getName() {
            return name;
        }
     
        /**
         * 设置
         * @param name
         */
        public void setName(String name) {
            this.name = name;
        }
     
        /**
         * 获取
         * @return phoneNumber
         */
        public String getPhoneNumber() {
            return phoneNumber;
        }
     
        /**
         * 设置
         * @param phoneNumber
         */
        public void setPhoneNumber(String phoneNumber) {
            this.phoneNumber = phoneNumber;
        }
     
        /**
         * 获取
         * @return password
         */
        public String getPassword() {
            return password;
        }
     
        /**
         * 设置
         * @param password
         */
        public void setPassword(String password) {
            this.password = password;
        }
     
        public String toString() {
            return "User{id = " + id + ", name = " + name + ", phoneNumber = " + phoneNumber + ", password = " + password + "}";
        }
    }

• Student类

  • package com.coolman.pojo;
     
    public class Student {
        private int id;
        private String stuNumber;
        private String name;
        private int age;
        private String sex;
        private double chineseScore;
        private double mathScore;
        private double englishScore;
     
     
        public Student() {
        }
     
        public Student(int id, String stuNumber, String name, int age, String sex, double chineseScore, double mathScore, double englishScore) {
            this.id = id;
            this.stuNumber = stuNumber;
            this.name = name;
            this.age = age;
            this.sex = sex;
            this.chineseScore = chineseScore;
            this.mathScore = mathScore;
            this.englishScore = englishScore;
        }
     
        /**
         * 获取
         * @return id
         */
        public int getId() {
            return id;
        }
     
        /**
         * 设置
         * @param id
         */
        public void setId(int id) {
            this.id = id;
        }
     
        /**
         * 获取
         * @return stuNumber
         */
        public String getStuNumber() {
            return stuNumber;
        }
     
        /**
         * 设置
         * @param stuNumber
         */
        public void setStuNumber(String stuNumber) {
            this.stuNumber = stuNumber;
        }
     
        /**
         * 获取
         * @return name
         */
        public String getName() {
            return name;
        }
     
        /**
         * 设置
         * @param name
         */
        public void setName(String name) {
            this.name = name;
        }
     
        /**
         * 获取
         * @return age
         */
        public int getAge() {
            return age;
        }
     
        /**
         * 设置
         * @param age
         */
        public void setAge(int age) {
            this.age = age;
        }
     
        /**
         * 获取
         * @return sex
         */
        public String getSex() {
            return sex;
        }
     
        /**
         * 设置
         * @param sex
         */
        public void setSex(String sex) {
            this.sex = sex;
        }
     
        /**
         * 获取
         * @return chineseScore
         */
        public double getChineseScore() {
            return chineseScore;
        }
     
        /**
         * 设置
         * @param chineseScore
         */
        public void setChineseScore(double chineseScore) {
            this.chineseScore = chineseScore;
        }
     
        /**
         * 获取
         * @return mathScore
         */
        public double getMathScore() {
            return mathScore;
        }
     
        /**
         * 设置
         * @param mathScore
         */
        public void setMathScore(double mathScore) {
            this.mathScore = mathScore;
        }
     
        /**
         * 获取
         * @return englishScore
         */
        public double getEnglishScore() {
            return englishScore;
        }
     
        /**
         * 设置
         * @param englishScore
         */
        public void setEnglishScore(double englishScore) {
            this.englishScore = englishScore;
        }
     
        public String toString() {
            return "Student{id = " + id + ", stuNumber = " + stuNumber + ", name = " + name + ", age = " + age + ", sex = " + sex + ", chineseScore = " + chineseScore + ", mathScore = " + mathScore + ", englishScore = " + englishScore + "}";
        }
    }
     

1.3、工具类准备

• MyBatisUtils工具类

  • 用来指定MyBatis的配置文件和创建SqlSession或者SqlSessionFactory实例

  • package com.coolman.utils;
     
    import org.apache.ibatis.io.Resources;
    import org.apache.ibatis.session.SqlSession;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.apache.ibatis.session.SqlSessionFactoryBuilder;
     
    import java.io.IOException;
    import java.io.InputStream;
     
    // 这是MyBatis的工具类,简化MyBatis代码
    public class MyBatisUtils {
        private static SqlSessionFactory sqlSessionFactory;
        // 我们只需要一个SqlSessionFactory,在静态代码块中创建SqlSessionFactory
        static {
            try {
                // 编写代码让MyBatis跑起来,执行SQL语句
                String resource = "mybatis-config.xml";
                // 加载核心配置文件
                InputStream inputStream = Resources.getResourceAsStream(resource);
                // 得到SqlSession工厂,赋值给成员变量
                sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
     
        // 返回SqlSessionFactory
        public static SqlSessionFactory getSqlSessionFactory() {
            return sqlSessionFactory;
        }
     
        // 返回SqlSession
        public static SqlSession openSession() {
            return sqlSessionFactory.openSession();
        }
     
        public static SqlSession openSession(boolean autoCommit) {
            return sqlSessionFactory.openSession(autoCommit);
        }
    }

• CheckCodeUtils工具类

  • 用来生成验证码的工具类，其原理可以参考像关于Java的awt图像生成和验证码生成原理相关博客；（复制使用即可，原理不用深究）

  • package com.coolman.utils;
     
    import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.geom.AffineTransform;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.util.Arrays;
    import java.util.Random;
     
    /**
     * 生成验证码工具类
     */
    public class CheckCodeUtil {
     
        private static final String VERIFY_CODES = "123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        private static Random random = new Random();
     
        public static void main(String[] args) throws IOException {
            FileOutputStream fos = new FileOutputStream("d:\\a.jpg");
            String str = CheckCodeUtil.outputVerifyImage(100, 40, fos, 4);
            System.out.println("str = " + str);
        }
     
     
        /**
         * 输出随机验证码图片流,并返回验证码值（一般传入输出流，响应response页面端，Web项目用的较多）
         *
         * @param width      图片宽度
         * @param height     图片高度
         * @param os         输出流
         * @param verifySize 数据长度
         * @return 验证码数据
         * @throws IOException
         */
        public static String outputVerifyImage(int width, int height, OutputStream os, int verifySize) throws IOException {
            String verifyCode = generateVerifyCode(verifySize);
            outputImage(width, height, os, verifyCode);
            return verifyCode;
        }
     
        /**
         * 使用系统默认字符源生成验证码
         *
         * @param verifySize 验证码长度
         * @return
         */
        public static String generateVerifyCode(int verifySize) {
            return generateVerifyCode(verifySize, VERIFY_CODES);
        }
     
        /**
         * 使用指定源生成验证码
         *
         * @param verifySize 验证码长度
         * @param sources    验证码字符源
         * @return
         */
        public static String generateVerifyCode(int verifySize, String sources) {
            // 未设定展示源的字码，赋默认值大写字母+数字
            if (sources == null || sources.length() == 0) {
                sources = VERIFY_CODES;
            }
            int codesLen = sources.length();
            Random rand = new Random(System.currentTimeMillis());
            StringBuilder verifyCode = new StringBuilder(verifySize);
            for (int i = 0; i < verifySize; i++) {
                verifyCode.append(sources.charAt(rand.nextInt(codesLen - 1)));
            }
            return verifyCode.toString();
        }
     
        /**
         * 生成随机验证码文件,并返回验证码值 (生成图片形式，用的较少)
         *
         * @param w
         * @param h
         * @param outputFile
         * @param verifySize
         * @return
         * @throws IOException
         */
        public static String outputVerifyImage(int w, int h, File outputFile, int verifySize) throws IOException {
            String verifyCode = generateVerifyCode(verifySize);
            outputImage(w, h, outputFile, verifyCode);
            return verifyCode;
        }
     
     
        /**
         * 生成指定验证码图像文件
         *
         * @param w
         * @param h
         * @param outputFile
         * @param code
         * @throws IOException
         */
        public static void outputImage(int w, int h, File outputFile, String code) throws IOException {
            if (outputFile == null) {
                return;
            }
            File dir = outputFile.getParentFile();
            //文件不存在
            if (!dir.exists()) {
                //创建
                dir.mkdirs();
            }
            try {
                outputFile.createNewFile();
                FileOutputStream fos = new FileOutputStream(outputFile);
                outputImage(w, h, fos, code);
                fos.close();
            } catch (IOException e) {
                throw e;
            }
        }
     
        /**
         * 输出指定验证码图片流
         *
         * @param w
         * @param h
         * @param os
         * @param code
         * @throws IOException
         */
        public static void outputImage(int w, int h, OutputStream os, String code) throws IOException {
            int verifySize = code.length();
            BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
            Random rand = new Random();
            Graphics2D g2 = image.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
     
            // 创建颜色集合，使用java.awt包下的类
            Color[] colors = new Color[5];
            Color[] colorSpaces = new Color[]{Color.WHITE, Color.CYAN,
                    Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE,
                    Color.PINK, Color.YELLOW};
            float[] fractions = new float[colors.length];
            for (int i = 0; i < colors.length; i++) {
                colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];
                fractions[i] = rand.nextFloat();
            }
            Arrays.sort(fractions);
            // 设置边框色
            g2.setColor(Color.GRAY);
            g2.fillRect(0, 0, w, h);
     
            Color c = getRandColor(200, 250);
            // 设置背景色
            g2.setColor(c);
            g2.fillRect(0, 2, w, h - 4);
     
            // 绘制干扰线
            Random random = new Random();
            // 设置线条的颜色
            g2.setColor(getRandColor(160, 200));
            for (int i = 0; i < 20; i++) {
                int x = random.nextInt(w - 1);
                int y = random.nextInt(h - 1);
                int xl = random.nextInt(6) + 1;
                int yl = random.nextInt(12) + 1;
                g2.drawLine(x, y, x + xl + 40, y + yl + 20);
            }
     
            // 添加噪点
            // 噪声率
            float yawpRate = 0.05f;
            int area = (int) (yawpRate * w * h);
            for (int i = 0; i < area; i++) {
                int x = random.nextInt(w);
                int y = random.nextInt(h);
                // 获取随机颜色
                int rgb = getRandomIntColor();
                image.setRGB(x, y, rgb);
            }
            // 添加图片扭曲
            shear(g2, w, h, c);
     
            g2.setColor(getRandColor(100, 160));
            int fontSize = h - 4;
            Font font = new Font("Algerian", Font.ITALIC, fontSize);
            g2.setFont(font);
            char[] chars = code.toCharArray();
            for (int i = 0; i < verifySize; i++) {
                AffineTransform affine = new AffineTransform();
                affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1), (w / verifySize) * i + fontSize / 2, h / 2);
                g2.setTransform(affine);
                g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + fontSize / 2 - 10);
            }
     
            g2.dispose();
            ImageIO.write(image, "jpg", os);
        }
     
        /**
         * 随机颜色
         *
         * @param fc
         * @param bc
         * @return
         */
        private static Color getRandColor(int fc, int bc) {
            if (fc > 255) {
                fc = 255;
            }
            if (bc > 255) {
                bc = 255;
            }
            int r = fc + random.nextInt(bc - fc);
            int g = fc + random.nextInt(bc - fc);
            int b = fc + random.nextInt(bc - fc);
            return new Color(r, g, b);
        }
     
        private static int getRandomIntColor() {
            int[] rgb = getRandomRgb();
            int color = 0;
            for (int c : rgb) {
                color = color << 8;
                color = color | c;
            }
            return color;
        }
     
        private static int[] getRandomRgb() {
            int[] rgb = new int[3];
            for (int i = 0; i < 3; i++) {
                rgb[i] = random.nextInt(255);
            }
            return rgb;
        }
     
        private static void shear(Graphics g, int w1, int h1, Color color) {
            shearX(g, w1, h1, color);
            shearY(g, w1, h1, color);
        }
     
        private static void shearX(Graphics g, int w1, int h1, Color color) {
            int period = random.nextInt(2);
     
            boolean borderGap = true;
            int frames = 1;
            int phase = random.nextInt(2);
     
            for (int i = 0; i < h1; i++) {
                double d = (double) (period >> 1)
                        * Math.sin((double) i / (double) period
                        + (6.2831853071795862D * (double) phase)
                        / (double) frames);
                g.copyArea(0, i, w1, 1, (int) d, 0);
                if (borderGap) {
                    g.setColor(color);
                    g.drawLine((int) d, i, 0, i);
                    g.drawLine((int) d + w1, i, w1, i);
                }
            }
        }
     
        private static void shearY(Graphics g, int w1, int h1, Color color) {
            int period = random.nextInt(40) + 10; // 50;
     
            boolean borderGap = true;
            int frames = 20;
            int phase = 7;
            for (int i = 0; i < w1; i++) {
                double d = (double) (period >> 1)
                        * Math.sin((double) i / (double) period
                        + (6.2831853071795862D * (double) phase)
                        / (double) frames);
                g.copyArea(i, 0, 1, h1, 0, (int) d);
                if (borderGap) {
                    g.setColor(color);
                    g.drawLine(i, (int) d, i, 0);
                    g.drawLine(i, (int) d + h1, i, h1);
                }
            }
        }
    }

1.4、MyBatis相关配置准备

• logback.xml

  • 日志配置文件

  • <?xml version="1.0" encoding="UTF-8"?>
    <configuration>
        <!--CONSOLE ：表示当前的日志信息是可以输出到控制台的。-->
        <appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
            <encoder>
                <pattern>[%level] %blue(%d{HH:mm:ss.SSS}) %cyan([%thread]) %boldGreen(%logger{15}) - %msg %n</pattern>
            </encoder>
        </appender>
     
        <logger name="com.coolman" level="DEBUG" additivity="false">
            <appender-ref ref="Console"/>
        </logger>
     
        <!--level:用来设置打印级别，大小写无关：TRACE, DEBUG, INFO, WARN, ERROR, ALL 和 OFF， 默认debug
          <root>可以包含零个或多个<appender-ref>元素，标识这个输出位置将会被本日志级别控制。-->
        <root level="DEBUG">
            <appender-ref ref="Console"/>
        </root>
    </configuration>

• mybatis-config.xml

  • MyBatis的配置文件

  • <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration
            PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
        <settings>
    <!--        开启驼峰命名自动映射-->
            <setting name="mapUnderscoreToCamelCase" value="true"/>
        </settings>
        
        <!--起别名-->
        <typeAliases>
            <package name="com.coolman.pojo"/>
        </typeAliases>
     
        <environments default="development">
            <environment id="development">
                <transactionManager type="JDBC"/>
                <dataSource type="POOLED">
                    <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                    <property name="url" value="jdbc:mysql://localhost:3306/sms?serverTimezone=Asia/Shanghai"/>
                    <property name="username" value="root"/>
                    <property name="password" value="123"/>
                </dataSource>
            </environment>
        </environments>
     
        <mappers>
            <!--扫描mapper-->
            <package name="com.coolman.mapper"/>
        </mappers>
    </configuration>

1.5、前端代码准备

• css文件夹相关文件

  • login.css

    • * {
          margin: 0;
          padding: 0;
      }
       
      html {
          height: 100%;
          width: 100%;
          overflow: hidden;
          margin: 0;
          padding: 0;
          background: url(../imgs/Desert1.jpg) no-repeat 0px 0px;
          background-repeat: no-repeat;
          background-size: 100% 100%;
          -moz-background-size: 100% 100%;
      }
       
      body {
          display: flex;
          align-items: center;
          justify-content: center;
          height: 100%;
      }
       
      #loginDiv {
          width: 37%;
          display: flex;
          justify-content: center;
          align-items: center;
          height: 380px;
          background-color: rgba(75, 81, 95, 0.3);
          box-shadow: 7px 7px 17px rgba(52, 56, 66, 0.5);
          border-radius: 5px;
      }
       
      #name_trip {
          margin-left: 50px;
          color: red;
      }
       
      p {
          margin-top: 30px;
          margin-left: 20px;
          color: azure;
      }
       
       
      #remember{
          margin-left: 15px;
          border-radius: 5px;
          border-style: hidden;
          background-color: rgba(216, 191, 216, 0.5);
          outline: none;
          padding-left: 10px;
          height: 20px;
          width: 20px;
      }
      #phone_number{
          width: 200px;
          margin-left: 15px;
          border-radius: 5px;
          border-style: hidden;
          height: 30px;
          background-color: rgba(216, 191, 216, 0.5);
          outline: none;
          color: #f0edf3;
          padding-left: 10px;
      }
      #password{
          width: 202px;
          margin-left: 30px;
          border-radius: 5px;
          border-style: hidden;
          height: 30px;
          background-color: rgba(216, 191, 216, 0.5);
          outline: none;
          color: #f0edf3;
          padding-left: 10px;
      }
      .button {
          border-color: cornsilk;
          background-color: rgba(100, 149, 237, .7);
          color: aliceblue;
          border-style: hidden;
          border-radius: 5px;
          width: 100px;
          height: 31px;
          font-size: 16px;
      }
       
      #subDiv {
          text-align: center;
          margin-top: 30px;
      }
      #loginMsg{
          text-align: center;
          color: aliceblue;
      }
      #errorMsg{
          text-align: center;
          color:red;
      }

  • register.css

    • * {
          margin: 0;
          padding: 0;
          list-style-type: none;
      }
      .reg-content{
          padding: 30px;
          margin: 3px;
      }
      a, img {
          border: 0;
      }
       
      body {
          background-image: url("../imgs/reg_bg_min.jpg") ;
          text-align: center;
      }
       
      table {
          border-collapse: collapse;
          border-spacing: 0;
      }
       
      td, th {
          padding: 0;
          height: 90px;
       
      }
      .inputs{
          vertical-align: top;
      }
       
      .clear {
          clear: both;
      }
       
      .clear:before, .clear:after {
          content: "";
          display: table;
      }
       
      .clear:after {
          clear: both;
      }
       
      .form-div {
          background-color: rgba(255, 255, 255, 0.27);
          border-radius: 10px;
          border: 1px solid #aaa;
          width: 424px;
          margin-top: 150px;
          margin-left:1050px;
          padding: 30px 0 20px 0px;
          font-size: 16px;
          box-shadow: inset 0px 0px 10px rgba(255, 255, 255, 0.5), 0px 0px 15px rgba(75, 75, 75, 0.3);
          text-align: left;
      }
       
      .form-div input[type="text"], .form-div input[type="password"], .form-div input[type="email"] {
          width: 268px;
          margin: 10px;
          line-height: 20px;
          font-size: 16px;
      }
       
      .form-div input[type="checkbox"] {
          margin: 20px 0 20px 10px;
      }
       
      .form-div input[type="button"], .form-div input[type="submit"] {
          margin: 10px 20px 0 0;
      }
       
      .form-div table {
          margin: 0 auto;
          text-align: right;
          color: rgba(64, 64, 64, 1.00);
      }
       
      .form-div table img {
          vertical-align: middle;
          margin: 0 0 5px 0;
      }
       
      .footer {
          color: rgba(64, 64, 64, 1.00);
          font-size: 12px;
          margin-top: 30px;
      }
       
      .form-div .buttons {
          float: right;
      }
       
      input[type="text"], input[type="password"], input[type="email"] {
          border-radius: 8px;
          box-shadow: inset 0 2px 5px #eee;
          padding: 10px;
          border: 1px solid #D4D4D4;
          color: #333333;
          margin-top: 5px;
      }
       
      input[type="text"]:focus, input[type="password"]:focus, input[type="email"]:focus {
          border: 1px solid #50afeb;
          outline: none;
      }
       
      input[type="button"], input[type="submit"] {
          padding: 7px 15px;
          background-color: #3c6db0;
          text-align: center;
          border-radius: 5px;
          overflow: hidden;
          min-width: 80px;
          border: none;
          color: #FFF;
          box-shadow: 1px 1px 1px rgba(75, 75, 75, 0.3);
      }
       
      input[type="button"]:hover, input[type="submit"]:hover {
          background-color: #5a88c8;
      }
       
      input[type="button"]:active, input[type="submit"]:active {
          background-color: #5a88c8;
      }
      .phone_number_err_msg{
          color: red;
          padding-right: 170px;
      }
       
      #password_err,#tel_err{
          padding-right: 195px;
      }
       
      #reg_btn{
          margin-right:50px; width: 285px; height: 45px; margin-top:20px;
      }
       
      #checkCode{
          width: 100px;
      }
       
      #changeImg{
          color: aqua;
      }

• img文件夹相关图片

  • Desert1.jpg
    • 
  • reg_bg_min.jpg
    • 

• JSP相关文件

  • addStudnet.jsp

    • <%@ page contentType="text/html;charset=UTF-8" language="java" %>
      <html>
      <head>
          <title>添加学生信息</title>
      </head>
      <body>
       
      <h3 align="center" style="color: red">添加学生信息</h3>
      <form action="addStudentServlet" method="post">
          <div align="center">
              <span>学号:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="stuNumber"><br>
              </span>
              <span>姓名:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="name"><br>
              </span>
              <span>年龄:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="age"><br>
              </span>
              <span>性别:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="sex"><br>
              </span>
              <span>语文成绩:
                  <input name="chineseScore"><br>
              </span>
              <span>数学成绩:
                  <input name="mathScore"><br>
              </span>
              <span>英语成绩:
                  <input name="englishScore"><br>
              </span>
       
              <input type="submit" value="提交">
          </div>
      </form>
      </body>
      </html>

  • login.jsp

    • <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
      <%@ page contentType="text/html;charset=UTF-8" language="java" %>
      <!DOCTYPE html>
      <html lang="en">
       
      <head>
          <meta charset="UTF-8">
          <title>login</title>
          <link href="css/login.css" rel="stylesheet">
      </head>
       
      <body>
      <div id="loginDiv" style="height: 350px">
          <form action="loginServlet" method="post" id="form">
              <h1 id="loginMsg">登 录</h1>
              <div id="errorMsg">${loginMessage} ${registerMessage}</div>
              <p>用户名:<input id="phone_number" name="phone_number" type="text" value="${cookie.cookie_phone_number.value}"></p>
              <p>密码:<input id="password" name="password" type="password" value="${cookie.cookie_password.value}"></p>
              <div style="text-align: center">
                  <c:if test="${cookie.cookie_phone_number.value != null}">
                      <p>记住我: <input name="remember" type="checkbox" value="1" checked="checked"></p>
                  </c:if>
                  <c:if test="${cookie.cookie_phone_number.value == null}">
                      <p>记住我: <input name="remember" type="checkbox" value="1"></p>
                  </c:if>
              </div>
              <div id="subDiv">
                  <input type="submit" class="button" value="登 录">
                  <input type="reset" class="button" value="reset">&nbsp;&nbsp;&nbsp;
                  <a href="register.jsp">没有账号？</a>
              </div>
          </form>
      </div>
      </body>
      <%--<script>--%>
      <%--    document.querySelectorAll('.inputs')[3].removeAttribute("check")--%>
      <%--</script>--%>
      </html>

  • register.jsp

    • <%@ page contentType="text/html;charset=UTF-8" language="java" %>
      <!DOCTYPE html>
      <html lang="en">
      <head>
          <meta charset="UTF-8">
          <title>欢迎注册</title>
          <link href="css/register.css" rel="stylesheet">
      </head>
      <body>
       
      <div class="form-div">
          <div class="reg-content">
              <h1>欢迎注册</h1>
              <span>已有帐号？</span> <a href="login.jsp">登录</a>
          </div>
          <form id="reg-form" action="registerServlet" method="post">
              <table>
                  <tr>
                      <td>姓名</td>
                      <td class="inputs">
                          <input name="username" type="text" id="username">
                          <br>
                      </td>
                  </tr>
                  <tr>
                      <td>手机号码</td>
                      <td class="inputs">
                          <input name="phone_number" type="text" id="phone_number">
                          <br>
                          <span id="phone_number_err" class="phone_number_err_msg">${phone_number_err_msg}</span>
                      </td>
                  </tr>
       
                  <tr>
                      <td>密码</td>
                      <td class="inputs">
                          <input name="password" type="password" id="password">
                          <br>
                      </td>
                  </tr>
       
                  <tr>
                      <td>验证码：</td>
                      <td class="inputs">
                          <input name="checkCode" type="text" id="checkCode">
                          <img id="checkCodeImg" src="checkCodeServlet">
                          <a href="#" id="changeImg">看不清？</a>
                          <p  style="color: red"  align="left" id="checkCode_err" class="checkCode_err_msg">
                              ${checkCode_err_msg}
                          </p>
                      </td>
                  </tr>
      <%--            <tr>--%>
      <%--                <td></td>--%>
      <%--                <td style="color: red" align="center" id="checkCode_err" class="checkCode_err_msg">${checkCode_err_msg}</td>--%>
      <%--            </tr>--%>
       
              </table>
       
              <div class="buttons">
                  <input value="注 册" type="submit" id="reg_btn">
              </div>
              <br class="clear">
          </form>
      </div>
       
      <script>
          // 点击换图片
          document.getElementById("changeImg").onclick = function () {
              let time = new Date().getTime();
       
              // 找到img标签,更换src属性, 如果src相同,不会更换图片
              document.getElementById("checkCodeImg").src = "checkCodeServlet?time=" + time;
          }
      </script>
      </body>
      </html>

  • studentList.jsp

    • <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
      <%@ page contentType="text/html;charset=UTF-8" language="java" %>
       
      <!DOCTYPE html>
      <html lang="en">
      <head>
          <meta charset="UTF-8">
          <title>Title</title>
      </head>
      <body>
      <h1 style="color: red" align="center">欢迎您: ${username} 登录成功, 来到学生信息管理系统</h1>
      <br>
      <hr>
      <table border="1" cellspacing="0" width="800" align="center">
          <tr>
              <th>序号</th>
              <th>学号</th>
              <th>姓名</th>
              <th>年龄</th>
              <th>性别</th>
              <th>语文成绩</th>
              <th>数学成绩</th>
              <th>英语成绩</th>
              <th>操作</th>
          </tr>
       
          <c:forEach items="${students}" var="student" varStatus="varSta">
              <tr align="center">
                  <td>${varSta.count}</td>
                  <td>${student.stuNumber}</td>
                  <td>${student.name}</td>
                  <td>${student.age}</td>
                  <td>${student.sex}</td>
                  <td>${student.chineseScore}</td>
                  <td>${student.mathScore}</td>
                  <td>${student.englishScore}</td>
                  <td><a href="updateBrand.jsp?id=${student.id}">修改</a> <a href="DeleteStudentByIdServlet?id=${student.id}">删除</a></td>
              </tr>
          </c:forEach>
       
          <tr align="center">
              <td></td>
              <td></td>
              <td></td>
              <td></td>
              <td></td>
              <td></td>
              <td></td>
              <td></td>
              <td><input type="button" value="新增学生信息" onclick="location.href=('addStudent.jsp')"></td>
          </tr>
      </table>
       
      </body>
      </html>

  • updateBrand.jsp

    • <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
      <%@ page contentType="text/html;charset=UTF-8" language="java" %>
      <html>
      <head>
          <title>修改品牌</title>
      </head>
      <body>
      <%
          String id = request.getParameter("id");
      %>
      <h3>修改品牌</h3>
      <form action="updateStudentByIdServlet" method="post">
          <div align="center">
              <input type="hidden" name="id" value="<%=id%>">
              <span>学号:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="stuNumber"><br>
              </span>
              <span>姓名:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="name"><br>
              </span>
              <span>年龄:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="age"><br>
              </span>
              <span>性别:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                  <input name="sex"><br>
              </span>
              <span>语文成绩:
                  <input name="chineseScore"><br>
              </span>
              <span>数学成绩:
                  <input name="mathScore"><br>
              </span>
              <span>英语成绩:
                  <input name="englishScore"><br>
              </span>
       
              <input type="submit" value="提交">
          </div>
      </form>
       
      </body>
      </html>
       

2、编码实现

2.1、登录注册

2.1.1、登录

Servlet实现

• package com.coolman.web;
   
  import com.coolman.pojo.User;
  import com.coolman.service.UserService;
   
  import javax.servlet.ServletException;
  import javax.servlet.annotation.WebServlet;
  import javax.servlet.http.*;
  import java.io.IOException;
   
  @WebServlet("/loginServlet")
  public class LoginServlet extends HttpServlet {
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request, response);
      }
   
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // 在这里处理请求
   
          // 获取登录页面POST请求传递回来的参数
          String phoneNumber = request.getParameter("phone_number");
          String password = request.getParameter("password");
          String remember = request.getParameter("remember");
   
          // 调用服务查询该用户是否存在
          User user = new UserService().selectUserByPhoneNumberAndPassword(phoneNumber, password);
   
          // 如果用户存在
          if (user != null) {
              // “记住我”功能
              // 如果用户勾选了记住我，那么就将该数据存储至cookie中，交由客户端保存
              Cookie phoneNumberCookie = new Cookie("cookie_phone_number", phoneNumber);
              Cookie passwordCookie = new Cookie("cookie_password", password);
              if ("1".equals(remember)) {
                  // 如果勾选
   
                  response.addCookie(phoneNumberCookie);
                  response.addCookie(passwordCookie);
   
                  System.out.println("用户勾选了“记住我”功能，并将数据保存到了cookie当中");
   
              } else {
                  phoneNumberCookie.setMaxAge(0);
                  passwordCookie.setMaxAge(0);
                  response.addCookie(phoneNumberCookie);
                  response.addCookie(passwordCookie);
              }
   
              // 将用户信息存储在Session中，并跳转到信息展示列表页
              HttpSession session = request.getSession();
              session.setAttribute("username", user.getName());
   
              // 跳转到信息展示列表页
              response.sendRedirect("selectAllStudentsServlet");
          } else {
              // 如果用户不存在
              // 提示错误信息
              request.setAttribute("loginMessage", "用户名或者密码错误！");
   
              // 请求转发重新回到登录界面
              request.getRequestDispatcher("login.jsp").forward(request, response);
          }
   
      }
  }
   

Service实现

• // 根据账号和密码查询用户
      public User selectUserByPhoneNumberAndPassword(String phoneNumber, String password) {
          SqlSession sqlSession = MyBatisUtils.openSession();
   
          UserMapper mapper = sqlSession.getMapper(UserMapper.class);
   
          User user = mapper.selectUserByPhoneNumberAndPassword(phoneNumber, password);
   
          sqlSession.close();
   
          return user;
      }

mapper实现

•     // 根据账号和密码查询用户
      @Select("select * from sms.user where phone_number = #{phoneNumber} and password = #{password};")
      User selectUserByPhoneNumberAndPassword(@Param("phoneNumber") String phoneNumber, @Param("password") String password);
   

2.1.2、注册

Servlet实现

• RegisterServlet

  • package com.coolman.web;
     
    import com.coolman.pojo.User;
    import com.coolman.service.UserService;
     
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    import java.io.IOException;
     
    @WebServlet("/registerServlet")
    public class RegisterServlet extends HttpServlet {
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            doGet(request, response);
        }
     
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            // 在这里处理请求
            // 获取表单参数
     
            String username = request.getParameter("username");
            String phoneNumber = request.getParameter("phone_number");
            String password = request.getParameter("password");
            String checkCode = request.getParameter("checkCode");
     
            // 获取正确的验证码
            HttpSession session = request.getSession();
            String correctCode = (String) session.getAttribute("correctCode");
     
            // 判断phoneNumber是否唯一
            // 查询数据库，调用服务
            UserService service = new UserService();
            User user = service.selectUserByPhoneNumber(phoneNumber);
     
            if (user == null) {
                // user 为空，说明不存在该用户，所以可以创建账号
                // 调用服务，添加用户
                // 判断验证码是否输入正确(忽略大小写)
                if (correctCode.equalsIgnoreCase(checkCode)) {
                    // 如果验证码输入正确
                    // 调用服务，添加用户
                    service.addUser(new User(0, username, phoneNumber, password));
     
                    request.setAttribute("registerMessage", "注册成功,请登录");
                    request.getRequestDispatcher("login.jsp").forward(request, response);
                } else {
                    // 如果输入错误
                    // 给出错误信息，验证码输入错误！
                    request.setAttribute("checkCode_err_msg", "验证码输入错误！");
                    request.getRequestDispatcher("register.jsp").forward(request, response);
                }
     
            } else {
                // 给出错误信息：手机号码重复！
                request.setAttribute("phone_number_err_msg", "手机号码重复，请重新输入！");
                // 请求转发回去给register.jsp
                request.getRequestDispatcher("register.jsp").forward(request, response);
            }
     
        }
    }
     

• CheckCodeServlet

  • package com.coolman.web;
     
    import com.coolman.utils.CheckCodeUtil;
     
    import javax.servlet.ServletException;
    import javax.servlet.ServletOutputStream;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    import javax.servlet.http.HttpSession;
    import java.io.IOException;
     
    @WebServlet("/checkCodeServlet")
    public class CheckCodeServlet extends HttpServlet {
        protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            doGet(request, response);
        }
     
        protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            // 在这里处理请求
            // 获取验证码
            // 创建一个输出流
            ServletOutputStream out = response.getOutputStream();
            String correctCode = CheckCodeUtil.outputVerifyImage(100, 40, out, 4);
     
            // 将正确的验证码存储到Session中
            HttpSession session = request.getSession();
     
            session.setAttribute("correctCode", correctCode);
        }
    }
     

Service实现

•     // 根据账号查询用户
      public User selectUserByPhoneNumber(String phoneNumber) {
          SqlSession sqlSession = MyBatisUtils.openSession();
   
          UserMapper mapper = sqlSession.getMapper(UserMapper.class);
   
          User user = mapper.selectUserByPhoneNumber(phoneNumber);
   
          sqlSession.close();
   
          return user;
      }
      // 添加用户
      public void addUser(User user) {
          SqlSession sqlSession = MyBatisUtils.openSession();
   
          UserMapper mapper = sqlSession.getMapper(UserMapper.class);
   
          mapper.addUser(user);
   
          sqlSession.commit();
          sqlSession.close();
      }

mapper实现

•     // 根据账号查询用户
      @Select("select * from sms.user where phone_number = #{phoneNumber}")
      User selectUserByPhoneNumber(String phoneNumber);
   
      // 添加用户
      @Insert("insert into sms.user values (null, #{name}, #{phoneNumber}, #{password});")
      void addUser(User user);
   

2.2、查询学生信息列表

Servlet实现

• package com.coolman.web;
   
  import com.coolman.pojo.Student;
  import com.coolman.service.StudentService;
   
  import javax.servlet.ServletException;
  import javax.servlet.annotation.WebServlet;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.util.List;
   
  @WebServlet("/selectAllStudentsServlet")
  public class SelectAllStudentsServlet extends HttpServlet {
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request, response);
      }
   
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // 在这里处理请求
          List<Student> students = new StudentService().selectAllStudent();
   
          request.setAttribute("students", students);
   
          request.getRequestDispatcher("studentList.jsp").forward(request, response);
      }
  }
   

Service实现

•     // 查询所有学生信息
      public List<Student> selectAllStudent() {
          SqlSession sqlSession = MyBatisUtils.openSession();
   
          StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
   
          List<Student> students = mapper.selectAllStudents();
   
          sqlSession.close();
   
          return students;
      }

mapper实现

•     // 查询所有学生信息
      @Select("select * from sms.student;")
      List<Student> selectAllStudents();

2.3、学生信息更新

这里我没有做数据回显，有兴趣的可以做一下

2.3.1、添加

Servlet实现

• package com.coolman.web;
   
  import com.coolman.pojo.Student;
  import com.coolman.service.StudentService;
  import org.apache.commons.beanutils.BeanUtils;
   
  import javax.servlet.ServletException;
  import javax.servlet.annotation.WebServlet;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.lang.reflect.InvocationTargetException;
  import java.util.Map;
   
  @WebServlet("/addStudentServlet")
  public class AddStudentServlet extends HttpServlet {
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request, response);
      }
   
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // 在这里处理请求
          Map<String, String[]> map = request.getParameterMap();
   
          Student student = new Student();
   
          try {
              BeanUtils.populate(student, map);
          } catch (IllegalAccessException | InvocationTargetException e) {
              e.printStackTrace();
          }
   
  //        System.out.println(student);
   
          // 调用服务
          StudentService service = new StudentService();
          service.addStudent(student);
   
          response.sendRedirect("selectAllStudentsServlet");
      }
  }
   

Service实现

•     // 新增学生信息
      public void addStudent(Student student) {
          SqlSession sqlSession = MyBatisUtils.openSession();
   
          StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
   
          mapper.addStudent(student);
   
          sqlSession.commit();
          sqlSession.close();
   
      }

mapper实现

•     // 新增学生信息
      @Insert("insert into sms.student values (null, #{stuNumber}, #{name}, #{age}, #{sex}, #{chineseScore}, " +
              "#{mathScore}, #{englishScore});")
      void addStudent(Student student);

2.3.2、删除

Servlet实现

• package com.coolman.web;
   
  import com.coolman.service.StudentService;
   
  import javax.servlet.ServletException;
  import javax.servlet.annotation.WebServlet;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
   
  @WebServlet("/DeleteStudentByIdServlet")
  public class DeleteStudentByIdServlet extends HttpServlet {
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request, response);
      }
   
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // 在这里处理请求
   
          // 获取id
          int sid = Integer.parseInt(request.getParameter("id"));
   
          // 调用服务
          StudentService service = new StudentService();
          service.deleteStudentById(sid);
   
          response.sendRedirect("selectAllStudentsServlet");
   
      }
  }
   

Service实现

•     // 删除学生信息
      public void deleteStudentById(int sid) {
          SqlSession sqlSession = MyBatisUtils.openSession();
   
          StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
   
          mapper.deleteStudentById(sid);
   
          sqlSession.commit();
          sqlSession.close();
   
      }

mapper实现

•     // 删除学生信息
      @Delete("delete from sms.student where id = #{sid};")
      void deleteStudentById(int sid);

2.3.3、修改

Servlet实现

• package com.coolman.web;
   
  import com.coolman.pojo.Student;
  import com.coolman.service.StudentService;
  import org.apache.commons.beanutils.BeanUtils;
   
  import javax.servlet.ServletException;
  import javax.servlet.annotation.WebServlet;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import java.io.IOException;
  import java.lang.reflect.InvocationTargetException;
  import java.util.Map;
   
  @WebServlet("/updateStudentByIdServlet")
  public class UpdateStudentByIdServlet extends HttpServlet {
      protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          doGet(request, response);
      }
   
      protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
          // 在这里处理请求
          request.setCharacterEncoding("utf-8");
          Map<String, String[]> map = request.getParameterMap();
          Student student = new Student();
   
          try {
              BeanUtils.populate(student, map);
          } catch (IllegalAccessException | InvocationTargetException e) {
              e.printStackTrace();
          }
   
  //        System.out.println(student);
          StudentService service = new StudentService();
   
          service.updateStudentById(student);
   
          response.sendRedirect("selectAllStudentsServlet");
      }
  }
   

Service实现

•     // 根据学生id修改学生数据
      public void updateStudentById(Student student) {
          SqlSession sqlSession = MyBatisUtils.openSession();
   
          StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
   
          mapper.updateStudentById(student);
   
          sqlSession.commit();
          sqlSession.close();
      }

mapper实现

•  
      // 根据学生id修改学生数据
      @Update("update sms.student set stu_number = #{stuNumber}, name = #{name}, age = #{age}, sex = #{sex}, " +
              "chinese_score = #{chineseScore}, math_score = #{mathScore}, " +
              "english_score = #{englishScore} where id = #{id};")
      void updateStudentById(Student student);

• 至此功能已经基本实现完成，直接添加到Tomcat项目中启动即可，不过这个案例有很多不足的地方，可自行修改；最终目录结构如下所示

  •