/*
 Navicat Premium Data Transfer

 Source Server         : MYSQL
 Source Server Type    : MySQL
 Source Server Version : 80013
 Source Host           : localhost:3306
 Source Schema         : jsp_score_management

 Target Server Type    : MySQL
 Target Server Version : 80013
 File Encoding         : 65001

 Date: 02/03/2022 17:32:29
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for admin
-- ----------------------------
DROP TABLE IF EXISTS `admin`;
CREATE TABLE `admin`  (
  `username` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL,
  `password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL
) ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of admin
-- ----------------------------
INSERT INTO `admin` VALUES ('admin', 'admin');

-- ----------------------------
-- Table structure for score
-- ----------------------------
DROP TABLE IF EXISTS `score`;
CREATE TABLE `score`  (
  `id` int(11) NOT NULL,
  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
  `subject` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL,
  `score` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = DYNAMIC;

-- ----------------------------
-- Records of score
-- ----------------------------
INSERT INTO `score` VALUES (1001, '张三', '数学', '99');
INSERT INTO `score` VALUES (1001, '张三', '英语', '80');
INSERT INTO `score` VALUES (1002, '李四', '数学', '80');
INSERT INTO `score` VALUES (1002, '李四', '英语', '90');

SET FOREIGN_KEY_CHECKS = 1;

5. System screenshot

2. System display

1. Log in to the system

2. System home page

3. New achievements

4. Modify grades

3. Part of the code

AdminDaoImpl

package com.sjsq.dao.impl;

import com.sjsq.dao.AdminDao;
import com.sjsq.utils.DBUtil;
import com.sjsq.entity.Admin;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @author: shuijianshiqing
 * @date: 2022-03-01
 * @description: 登录系统实现
 */
public class AdminDaoImpl implements AdminDao {

    /**
     * 登录系统
     * @param admin
     * @return
     */
    @Override
    public Admin login(Admin admin) {
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            // 1.获取数据库连接
            con = DBUtil.getConnection();
            // 2.写sql
            String sql = "select * from admin where username = ? and password = ?";
            // 3.预编译
            ps = con.prepareStatement(sql);
            // 4.设置值
            ps.setObject(1, admin.getUsername());
            ps.setObject(2, admin.getPassword());
            rs = ps.executeQuery();
            Admin adminLogin = null;
            if (rs.next()) {
                adminLogin = new Admin();
                // 从数据库中获取值到实体类的setter方法中
                adminLogin.setUsername(rs.getString("username"));
                adminLogin.setPassword(rs.getString("password"));

                // 返回的是你查询出来的完整的对象
                return adminLogin;

            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源，避免出现异常
            DBUtil.close(con, ps, rs);
        }
        return null;
    }

}

ScoreDaoImpl

package com.sjsq.dao.impl;

import com.sjsq.dao.ScoreDao;
import com.sjsq.entity.Score;
import com.sjsq.utils.DBUtil;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author: shuijianshiqing
 * @date: 2022-03-02
 * @description:
 */
public class ScoreDaoImpl implements ScoreDao {
    @Override
    public List<Score> selectAll(String sql, Object[] arr) {
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;

        try {
            // 1.连接数据库
            con = DBUtil.getConnection();
            // 2.预编译
            ps = con.prepareStatement(sql);
            if (arr != null) {
                for (int i = 0; i < arr.length; i++) {
                    // 传入sql的参数,向上转型,某个栏位的查询
                    ps.setObject(i + 1, arr[i]);
                }
            }
            // 3.执行sql
            rs = ps.executeQuery();
            // 4.保存查询出来的数据到list
            List<Score> list = new ArrayList<>();
            while (rs.next()) {

                Score score = new Score();

                score.setId(rs.getInt("id"));
                score.setName(rs.getString("name"));
                score.setSubject(rs.getString("subject"));
                score.setScore(rs.getString("score"));

                list.add(score);
            }
            return list;

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 关闭链接，避免数据库连接过多
            DBUtil.close(con, ps, rs);
        }
        return null;
    }

    @Override
    public Score selectScore(Integer id) {
        Connection con = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            // 1.连接数据库
            con = DBUtil.getConnection();
            // 2.预编译
            String sql = "select * from score where id = ?";
            ps = con.prepareStatement(sql);
            ps.setInt(1, id);
            // 3.执行sql
            rs = ps.executeQuery();
            while (rs.next()) {
                Score score = new Score();

                score.setId(rs.getInt("id"));
                score.setName(rs.getString("name"));
                score.setSubject(rs.getString("subject"));
                score.setScore(rs.getString("score"));

                return score;
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源，避免出现异常
            DBUtil.close(con, ps, rs);
        }
        return null;
    }

    @Override
    public boolean addScore(Score score) {
        String sql = "insert into score values (?,?,?,?)";
        List<Object> list = new ArrayList<Object>();

        list.add(score.getId());
        list.add(score.getName());
        list.add(score.getSubject());
        list.add(score.getScore());

        boolean flag = DBUtil.addUpdateDelete(sql, list.toArray());

        if (flag) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public boolean updateScore(Score score) {
        String sql = "update score set name=?,subject=?,score=? where id=?";
        List<Object> list = new ArrayList<Object>();

        list.add(score.getName());
        list.add(score.getSubject());
        list.add(score.getScore());
        // 注意id在最后面
        list.add(score.getId());

        boolean flag = DBUtil.addUpdateDelete(sql, list.toArray());
        if (flag) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public boolean deleteScore(Integer id) {
        String sql = "delete from score where id=?";
        List<Object> list = new ArrayList<Object>();

        list.add(id);

        boolean flag = DBUtil.addUpdateDelete(sql, list.toArray());
        if (flag) {
            return true;
        } else {
            return false;
        }
    }
}

score-add.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>新增成绩</title>
    <link rel="stylesheet" type="text/css" href="css/common.css">
</head>
<body>
<%-- 头部 --%>
<jsp:include page="top.jsp"/>

<h1>新增成绩</h1>
<hr/>

<div id="before">
    <a href="javascript: window.history.go(-1)">返回上一级</a>
</div>
</br>

<form action="score-add-do.jsp" method="post" name="addForm">
    <div>
        <tr>
            <label>学号：</label>
            <input type="text" name="id" id="id" placeholder="请输入学号">
        </tr>
    </div>
    <div>
        <tr>
            <label>姓名：</label>
            <input type="text" name="name" id="name" placeholder="请输入姓名">
        </tr>
    </div>
    <div>
        <tr>
            <label>科目：</label>
            <input type="text" name="subject" id="subject" placeholder="请输入科目">
        </tr>
    </div>

    <div>
        <tr>
            <label>分数：</label>
            <input type="text" name="score" id="score" placeholder="请输入分数">
        </tr>
    </div>

    <br>
    <div id="submit">
        <tr>
            <button type="submit" onclick="return checkForm()">添加</button>
            <button type="reset">重置</button>

        </tr>
    </div>
</form>

<script type="text/javascript">
    function checkForm() {
        var id = addForm.id.value;
        var name = addForm.name.value;
        // 成绩编号和成绩名称不能为空
        if (id == "" || id == null) {
            alert("请输入成绩编号");
            addForm.id.focus();
            return false;
        } else if (name == "" || name == null) {
            alert("请输入成绩名称");
            addForm.name.focus();
            return false;
        }
        return true;
    }
</script>

<%-- 底部 --%>
<jsp:include page="bottom.jsp"/>
</body>
</html>

score-add-do.jsp

<%@ page import="com.sjsq.entity.Score" %>
<%@ page import="com.sjsq.service.ScoreService" %>
<%@ page import="com.sjsq.service.impl.ScoreServiceImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>新增成绩</title>
</head>
<body>
<%
    // 设置获取注册时的编码为UTF-8
    request.setCharacterEncoding("UTF-8");

    //获取teacher-add.jsp页面提交的账号和密码,注意传过来的是字符串需要进行转化为对应的类型
    Integer id = Integer.parseInt(request.getParameter("id"));
    String name = request.getParameter("name");
    String subject = request.getParameter("subject");
    String score = request.getParameter("score");


    // 将信息保存到实体类中
    Score score1 = new Score();
    score1.setId(id);
    score1.setName(name);
    score1.setSubject(subject);
    score1.setScore(score);

    System.out.println("添加的成绩信息");
    System.out.println(score1);



    // 将数据写入到数据库
    ScoreService scoreService = new ScoreServiceImpl();
    boolean flag = scoreService.addScore(score1);

    if(flag){
        response.sendRedirect("main.jsp");
    }else{
        response.sendRedirect("error.jsp");
    }
%>
</body>
</html>

score-update.jsp

<%@ page import="com.sjsq.entity.Score" %>
<%@ page import="com.sjsq.service.ScoreService" %>
<%@ page import="com.sjsq.service.impl.ScoreServiceImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改成绩</title>
    <link rel="stylesheet" type="text/css" href="css/common.css">
</head>
<body>
<%-- 头部 --%>
<jsp:include page="top.jsp"/>

<h1>修改成绩</h1>
<hr/>

<%
    //获取main.jsp页面的id
    Integer id = Integer.parseInt(request.getParameter("id"));
    ScoreService ScoreService = new ScoreServiceImpl();
    Score score = ScoreService.selectScore(id);
%>

<div>
    <a href="javascript: window.history.go(-1)">返回上一级</a>
</div>
</br>

<form action="score-update-do.jsp" method="post" id="addForm">

    <div>
        <%-- 学号 --%>
        <tr>
            <label>学号：</label>
            <input type="text" name="id" id="id" placeholder="请输入学号" value="<%=score.getId()%>" readonly="true">
        </tr>
    </div>
    <div>
        <tr>
            <label>姓名：</label>
            <input type="text" name="name" id="name" placeholder="请输入姓名" value="<%=score.getName()%>" autofocus="autofocus">
        </tr>
    </div>
    <div>
        <tr>
            <label>科目：</label>
            <input type="text" name="subject" id="subject" placeholder="请输入科目" value="<%=score.getSubject()%>">
        </tr>
    </div>
    <div>
        <tr>
            <label>成绩：</label>
            <input type="text" name="score" id="score" placeholder="请输入成绩" value="<%=score.getScore()%>">
        </tr>
    </div>

    <br>
    <div id="submit">
        <tr>
            <button type="submit" onclick="return checkForm()">修改</button>
            <button type="reset">重置</button>

        </tr>
    </div>
</form>



<script type="text/javascript">
    function checkForm() {
        var id = addForm.id.value;
        var name = addForm.name.value;

        // 成绩编号和成绩名称不能为空
        if (id == "" || id == null) {
            alert("请输入成绩编号");
            addForm.id.focus();
            return false;
        } else if (name == "" || name == null) {
            alert("请输入成绩名称");
            addForm.name.focus();
            return false;
        }
        return true;
    }
</script>

<%-- 底部 --%>
<jsp:include page="bottom.jsp"/>
</body>
</html>

score-update-do.jsp

<%@ page import="com.sjsq.entity.Score" %>
<%@ page import="com.sjsq.service.ScoreService" %>
<%@ page import="com.sjsq.service.impl.ScoreServiceImpl" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改成绩</title>
</head>
<body>
<%
    // 设置获取注册时的编码为UTF-8
    request.setCharacterEncoding("UTF-8");

    //获取teacher-update.jsp页面提交的账号和密码,注意传过来的是字符串需要进行转化为对应的类型
    Integer id = Integer.parseInt(request.getParameter("id"));
    String name = request.getParameter("name");
    String subject = request.getParameter("subject");
    String score = request.getParameter("score");


    // 将信息保存到实体类中
    // 将信息保存到实体类中
    Score score1 = new Score();
    score1.setId(id);
    score1.setName(name);
    score1.setSubject(subject);
    score1.setScore(score);

    System.out.println("修改的成绩信息");
    System.out.println(score1);


    // 将数据写入到数据库
    ScoreService scoreService = new ScoreServiceImpl();
    boolean flag = scoreService.updateScore(score1);

    if(flag){
        response.sendRedirect("main.jsp");
    }else{
        response.sendRedirect("error.jsp");
    }
%>
</body>
</html>

4. Other

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2. Source code download

sql is under the sql folder

Java+JSP+Mysql realizes Web student achievement management system

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IDEA+Java+JSP+Mysql+Tomcat realizes Web student achievement management system

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