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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

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