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.增加商品
4.修改商品
三、部分代码
AdminDaoImpl
GoodsDaoImpl
goods-add.jsp
goods-add-do.jsp
goods-update.jsp
goods-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

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.管理员对商品信息的增删改查。
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_goods_management Target Server Type: MySQL Target Server Version : 80013 File Encoding: 65001 Date: 01/03/2022 14:34:48 */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 goods -- ---------------------------- DROP TABLE IF EXISTS `goods`; CREATE TABLE `goods`( `id` int(11) NOT NULL, `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL, `num` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL, `address` 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 goods -- ---------------------------- INSERT INTO `goods` VALUES (1001, '方便面', '30', '辽宁沈阳'); INSERT INTO `goods` VALUES (1002, '果粒橙', '50', '广东深圳'); INSERT INTO `goods` VALUES (1003, '苹果', '80', '甘肃天水'); INSERT INTO `goods` VALUES (1004, '牛肉面', '100', '甘肃兰州'); SET FOREIGN_KEY_CHECKS = 1;

5.系统截图
文章图片


二、系统展示 1.登录系统
文章图片


2.系统主页
文章图片


3.增加商品
文章图片


4.修改商品
文章图片

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; }}

GoodsDaoImpl

package com.sjsq.dao.impl; import com.sjsq.dao.GoodsDao; import com.sjsq.entity.Goods; import com.sjsq.entity.Goods; 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: 2022-03-01 * @description: */ public class GoodsDaoImpl implements GoodsDao {@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()) {Goods goods = new Goods(); goods.setId(rs.getInt("id")); goods.setName(rs.getString("name")); goods.setNum(rs.getString("num")); goods.setAddress(rs.getString("address")); list.add(goods); } 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 Goods selectGoods(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 goods where id = ?"; ps = con.prepareStatement(sql); ps.setInt(1, id); // 3.执行sql rs = ps.executeQuery(); while (rs.next()) { Goods goods = new Goods(); goods.setId(rs.getInt("id")); goods.setName(rs.getString("name")); goods.setNum(rs.getString("num")); goods.setAddress(rs.getString("address")); return goods; } } 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 addGoods(Goods goods) { String sql = "insert into goods values (?,?,?,?)"; List