IDEA+Java+JSP+Mysql+Tomcat实现Web学生成绩管理系统

目录

一、系统介绍

1.开发环境

2.技术选型

3.系统功能

4.数据库文件

5.系统截图

二、系统展示

1.登录系统

2.系统主页

3.新增成绩

4.修改成绩

三、部分代码 

AdminDaoImpl

ScoreDaoImpl

score-add.jsp

score-add-do.jsp

score-update.jsp

score-update-do.jsp

四、其他

1.更多系统

Java+JSP系统系列实现

Java+Servlet系统系列实现

Java+SSM系统系列实现

Java+SSH系统系列实现

Java+Springboot系统系列实现

2.源码下载

3.运行项目

4.备注

5.支持博主

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一、系统介绍

1.开发环境

开发工具：IDEA2018

JDK版本：Jdk1.8

Mysql版本：8.0.13

2.技术选型

Java+Jsp+Mysql

3.系统功能

1.登录系统；

2.管理员对学生成绩的增删改查。

4.数据库文件

/*
 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.系统截图

二、系统展示

1.登录系统

2.系统主页

3.新增成绩

4.修改成绩

三、部分代码 

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 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 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