「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发

「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发目录文档说明:一、语言和环境二、要求三、重要说明四、推荐实现步骤五、注意事项实现代码:一、数据库:二、JavaSwing:com.ynavc.Beancom.ynavc.Controllercom.ynavc.Daocom.ynavc.Testcom.ynavc.Vive文档说明:一、语言和环境A、实现语言Java(SWING+JDBC),MySqlB、开发环境MyEclipse9.0及以上版本,MySql5.6及…

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目录

文档说明:

一、语言和环境

二、要求

三、重要说明

四、推荐实现步骤

五、注意事项

实现代码:

一、数据库:

二、Java Swing:

com.ynavc.Bean

com.ynavc.Controller

com.ynavc.Dao

com.ynavc.Test

com.ynavc.Vive


文档说明:

一、语言和环境

A、实现语言

    Java(SWING+JDBC),MySql

B、开发环境

MyEclipse 9.0及以上版本,MySql 5.6及以上版本

二、要求

利用SWING编程实现商品的管理,要求如下:

1、商品管理页面布局,添加一个JScrollPanel(内嵌JTable),用来显示所有商品的信息;添加两个JLabel用于显示查询提示信息;添加JTextField用于输入商品商品名称;添加2个JButton,分别用来实现商品查询及添加商品,效果图如图1所示。

「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发
图1

2、在“商品名称”对应的JTextField中输入商品名称,单击“查询”:如果存在该商品,则显示如图2所示的窗体;若输入的名称不存在,则弹出“没找到该商品!”的对话框。

「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发
图2

3、单击“添加商品”按钮,弹出如图3所示的窗体,此时必须输入所有商品信息,

否则将弹出如图4所示的对话框;当商品信息输入完毕,单击“确定”按钮,实现商品的添加,

在弹出如图5所示的对话框后,释放窗体,并返回“商品管理”主界面,效果如图6所示。

「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发
图3
「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发
图4
「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发
图5
「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发
图6

三、重要说明

对于“添加”功能,程序员可以不用按照上述步骤实现,可以自定义添加界面,只要能实现添加功能即可。

四、推荐实现步骤

创建数据库dbGoods,添加表goods,表结构如表1所示,至少添加5条记录。

列名

类型

约束

备注

goodID

int或varchar(10)

主键

商品编号

goodName

varchar(20)

非空

商品名称

num

int

非空

商品数量

price

Decimal(3,1)

非空

商品单价

1、创建项目GoodsManagement,在其下新建文件夹“lib”,复制jar包文件(mysql-connector-java-5.1.34-bin.jar)存入其中,导入jar包到项目;

2、添加一个类GoodsManager:继承为JFrame,重载构造方法实现图1的布局效果;运行时,窗体居中参考代码如下:

this.setLocationRelativeTo(null);

自由布局参考如下:

this.setLayout(null);

创建一个JPanel,其布局也为自由布局;添加所有控件对象到其中;

控件位置与大小可使用以下方法实现:

对象名.setSize(int Width,int Height)

对象名.setLocation(int x,int y)

对象名.setBounds(int x,int y,int Width,int Height)

注意:在使用自由布局方式布局JPanel中的控件时,必须设置其大小,当然JPanel对象亦然,否则很有可能不能正常显示。

3、添加一个类DBManager:在其中创建获取连接对象的方法getConnection;创建查询通用方法runSelectSql;创建实现增、删、改的方法runUpdateSql方法。

4、单击“显示所有商品”、“按编号查询”及“按名称查询”按钮时调用DBManager.runSelectSql方法实现;单击“修改商品”、“删除商品”或“添加商品”按钮调用DBManager.runUpdateSql方法实现。

5、获取选定行的索引值,参考代码如下:

int index=table.getSelectedRow();//table为表格对象

获取选定行的商品名称,参考代码如下:

table.getValueAt(index,1);//index为选定行的索引值

6、在编写代码时,最好用方法对重复使用的代码进行封装,尽量减少代码的冗余;

7、编译程序,并运行。

五、注意事项

A、仔细审题,把题目要求理解准确;

B、请注意按照的界面的设计要求来进行窗体设计;

C、请注意代码的书写、命名符合规范和适当的注释;

评分标准:超市管理系统商品管理(查询及删除商品)

90

窗体布局与设计

10

数据库(5)、表及记录(5)

30

窗体布局合理,对象创建正确无误

25

查询正确

25

添加商品正确

10

总体编程技术

5

程序逻辑分明,有一定注释

5

命名符合规范,可读性好,编码书写有缩进

总分

100分

实现代码:

一、数据库:

/* Navicat Premium Data Transfer Source Server         : Demo Source Server Type    : MySQL Source Server Version : 50717 Source Host           : localhost:3306 Source Schema         : dbgoods Target Server Type    : MySQL Target Server Version : 50717 File Encoding         : 65001 Date: 16/09/2020 16:36:31*/SET NAMES utf8mb4;SET FOREIGN_KEY_CHECKS = 0;-- ------------------------------ Table structure for goods-- ----------------------------DROP TABLE IF EXISTS `goods`;CREATE TABLE `goods`  (  `goodsID` int(11) NOT NULL,  `goodsName` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,  `num` int(11) NOT NULL,  `price` decimal(10, 4) NOT NULL,  PRIMARY KEY (`goodsID`) USING BTREE) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;-- ------------------------------ Records of goods-- ----------------------------INSERT INTO `goods` VALUES (10002, '利鲜', 10, 20.0000);INSERT INTO `goods` VALUES (10003, '黄鹤楼', 100, 21.0000);INSERT INTO `goods` VALUES (10020, '酸奶', 50, 1.5000);INSERT INTO `goods` VALUES (10030, '矿泉水', 1000, 1000.0000);INSERT INTO `goods` VALUES (10040, '牛奶', 1000, 3.5000);SET FOREIGN_KEY_CHECKS = 1;

二、Java Swing:

com.ynavc.Bean

Goods.Java

package com.ynavc.Bean;

public class Goods {
	int goodsID;
	String goodsName;
	int num;
	String price;
	
	public Goods(int goodsID, String goodsName, int num, String price) {
		super();
		this.goodsID = goodsID;
		this.goodsName = goodsName;
		this.num = num;
		this.price = price;
	}
	public Goods() {
		super();
	}
	@Override
	public String toString() {
		return "Goods [goodsID=" + goodsID + ", goodsName=" + goodsName + ", num=" + num + ", price=" + price + "]";
	}
	public int getGoodsID() {
		return goodsID;
	}
	public void setGoodsID(int goodsID) {
		this.goodsID = goodsID;
	}
	public String getGoodsName() {
		return goodsName;
	}
	public void setGoodsName(String goodsName) {
		this.goodsName = goodsName;
	}
	public int getNum() {
		return num;
	}
	public void setNum(int num) {
		this.num = num;
	}
	public String getPrice() {
		return price;
	}
	public void setPrice(String price) {
		this.price = price;
	}
	
}

com.ynavc.Controller

Select.Java

package com.ynavc.Controller;
 
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;

import com.ynavc.Bean.Goods;
import com.ynavc.Dao.DbConnection;
 
public class Select {
	public static Object[][] getGoods(String sql) {
		
		ResultSet resultSet = DbConnection.query(sql);
		ArrayList<Goods> list=new ArrayList<Goods>();
		try {
			while (resultSet.next()) {
				Goods goods=new Goods();
				goods.setGoodsID(resultSet.getInt(1));
				goods.setGoodsName(resultSet.getString(2));
				goods.setNum(resultSet.getInt(3));
				goods.setPrice(resultSet.getString(4));
				list.add(goods);
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}
		Object[][] objects=new Object[list.size()][4];
		for(int i=0;i<list.size();i++) {
			objects[i][0]=list.get(i).getGoodsID();
			objects[i][1]=list.get(i).getGoodsName();
			objects[i][2]=list.get(i).getNum();
			objects[i][3]=list.get(i).getPrice();
		}
		return objects;
	}
	
}

Updata.Java


package com.ynavc.Controller;

import com.ynavc.Dao.DbConnection;

public class Updata {
	//添加数据
	public static int addData(String sql) {
		
		return DbConnection.updataInfo(sql);
	}
}

com.ynavc.Dao

DbConnection .Java

package com.ynavc.Dao;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
 
import javax.swing.JOptionPane;
 
import com.mysql.jdbc.Statement;
 
public class DbConnection {
	//驱动类的类名
	private static final String DRIVERNAME="com.mysql.jdbc.Driver";
	//连接数据的URL路径
//	private static final String URL="jdbc:mysql://118.31.124.77:3306/mydb23660";
	private static final String URL="jdbc:mysql://127.0.0.1:3306/dbgoods";
	//数据库登录账号
//	private static final String USER="mydb23660";
	private static final String USER="root";
	//数据库登录密码
//	private static final String PASSWORD="Hmsyfjdglxt66";
	private static final String PASSWORD="root";
	//加载驱动
	static{
		try {
			Class.forName(DRIVERNAME);
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
	}
    //获取数据库连接
	public static Connection getConnection() {
	          try {
		return DriverManager.getConnection(URL,USER,PASSWORD);
	           } catch (SQLException e) {	
		e.printStackTrace();
	           }
			return null;
	}
	//查询
	public static ResultSet query(String sql) {
		System.out.println(sql);
		//获取连接
		Connection connection=getConnection();
		PreparedStatement psd;
		try {
			psd = connection.prepareStatement(sql);
			return psd.executeQuery();
		} catch (SQLException e) {
			JOptionPane.showMessageDialog(null,"执行语句出错\n"+e.toString());
			e.printStackTrace();
		}
		return null;
	}
	//增、删、改、查
		public static int updataInfo(String sql) {
			System.out.println(sql);
			//获取连接
			Connection connection=getConnection();
			try {
				PreparedStatement psd=connection.prepareStatement(sql);
				return psd.executeUpdate();
			} catch (SQLException e) {
				JOptionPane.showMessageDialog(null,"执行语句出错\n"+e.toString());
				e.printStackTrace();
			}
			return 0;
		}
	//关闭连接
	public  static  void colse(ResultSet rs,Statement stmt,Connection  conn) throws Exception{
	          try { if (rs != null){ rs.close(); }
                         	 if (stmt != null) { stmt.cancel(); }
		 if (conn != null) { conn.close(); }
	   } catch (Exception e) {
		   e.printStackTrace(); throw new Exception();
	   }
	}
}

com.ynavc.Test

Main.Java

package com.ynavc.Test;

import com.ynavc.Vive.GoodsManagement;

public class Main {
	public static void main(String[] args) {
		GoodsManagement t = new GoodsManagement();
		t.setVisible(true);
	}
}

com.ynavc.Vive

GoodsManagement.Java

package com.ynavc.Vive;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
import javax.swing.table.DefaultTableModel;

import com.ynavc.Controller.Select;

import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class GoodsManagement extends JFrame {

	Select select = new Select();
	
	private JTextField textField;
	
	Object[] header= {"商品编号","商品名称","数量","单价"};
	String sql = "SELECT goodsID,goodsname,num,price FROM goods";
	Object[][] data= select.getGoods(sql);
	DefaultTableModel df = new DefaultTableModel(data, header);
	int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
	int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
	
	public GoodsManagement() {
		super("商品管理系统");
		this.setBounds(0, 0, 700, 450);
		this.setLocationRelativeTo(null);//让窗口在屏幕中间显示
		this.setResizable(false);//让窗口大小不可改变
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//用户单击窗口的关闭按钮时程序执行的操作
		getContentPane().setLayout(null);
		
		JLabel label = new JLabel("请输入商品名称:");
		label.setBounds(151, 39, 112, 32);
		getContentPane().add(label);
		
		textField = new JTextField();
		textField.setBounds(263, 43, 127, 26);
		getContentPane().add(textField);
		textField.setColumns(10);
		
		JButton button = new JButton("查询");
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				String sql = "SELECT goodsID,goodsname,num,price FROM goods WHERE goodsname LIKE '%"+textField.getText()+"%'";
				Object[][] data = Select.getGoods(sql);
				df.setDataVector(data, header);
			}
		});
		button.setBounds(411, 40, 90, 30);
		getContentPane().add(button);
		
		JButton button_1 = new JButton("添加");
		button_1.setBounds(559, 140, 90, 30);
		getContentPane().add(button_1);
		button_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				GoodsManage t = new GoodsManage();
				t.setVisible(true);
				dispose();
			}
		});
		
		JTable jTable = new JTable(df);
		JScrollPane jsp=new JScrollPane(jTable,v,h);
		jsp.setBounds(44, 103, 480, 282);
		getContentPane().add(jsp);
		
	}
	public static void main(String[] args) {
		GoodsManagement t = new GoodsManagement();
		t.setVisible(true);
	}
	
}

GoodsManage.Java

package com.ynavc.Vive;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;
import javax.swing.table.DefaultTableModel;

import com.ynavc.Bean.Goods;
import com.ynavc.Controller.Select;
import com.ynavc.Controller.Updata;

import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.ActionEvent;

public class GoodsManage extends JFrame {
	private JTextField textField;
	Select select = new Select();
	Updata updata = new Updata();
	Object[] header= {"商品编号","商品名称","数量","单价"};
	String sql = "SELECT goodsID,goodsname,num,price FROM goods";
	Object[][] data= select.getGoods(sql);
	DefaultTableModel df = new DefaultTableModel(data, header);
	int v=ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
	int h=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
	
	public GoodsManage() {
		super("商品管理系统");
		this.setBounds(0, 0, 700, 450);
		this.setLocationRelativeTo(null);//让窗口在屏幕中间显示
		this.setResizable(false);//让窗口大小不可改变
		getContentPane().setLayout(null);
		
		JTable jTable = new JTable(df);
		JScrollPane jsp=new JScrollPane(jTable,v,h);
		jsp.setBounds(10, 10, 515, 320);
		getContentPane().add(jsp);
		
		JButton button_1 = new JButton("显示所有商品");
		button_1.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				String sql = "SELECT goodsID,goodsname,num,price FROM goods";
				Object[][] data = Select.getGoods(sql);
				df.setDataVector(data, header);
			}
		});

		button_1.setBounds(535, 80, 127, 30);
		getContentPane().add(button_1);
		
		JButton button_2 = new JButton("修改商品");
		button_2.setBounds(535, 140, 127, 30);
		getContentPane().add(button_2);
		button_2.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				if (jTable.getSelectedColumn()<0) {
					JOptionPane.showMessageDialog(null, "请选择要修改的数据!");
				} else {
					int goodsID = Integer.parseInt(jTable.getValueAt(jTable.getSelectedRow(), 0).toString());
					String name = jTable.getValueAt(jTable.getSelectedRow(), 1).toString();
					int num = Integer.parseInt(jTable.getValueAt(jTable.getSelectedRow(), 2).toString());
					String price = jTable.getValueAt(jTable.getSelectedRow(), 3).toString();
					Goods goods = new Goods(goodsID,name,num,price);
					GoodsXG goodsXG = new GoodsXG(goods);
					goodsXG.setVisible(true);
				}
				
			}
		});
		
		JButton button_3 = new JButton("删除商品");
		button_3.setBounds(535, 200, 127, 30);
		getContentPane().add(button_3);
		button_3.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				if (jTable.getSelectedColumn()<0) {
					JOptionPane.showMessageDialog(null, "请选中要删除的数据!");
				} else {
					int goodsID = Integer.parseInt(jTable.getValueAt(jTable.getSelectedRow(), 0).toString());
					String sql="delete from goods where goodsid="+goodsID;
					int result = updata.addData(sql);
					if (result>0) {
						JOptionPane.showMessageDialog(null, "删除成功!");
						JOptionPane.showMessageDialog(null, "记得刷新一下哦!");
					} else {
						JOptionPane.showMessageDialog(null, "删除失败!");
					}
				}
			}
		});
		
		JButton button_4 = new JButton("添加商品");
		button_4.setBounds(535, 258, 127, 30);
		getContentPane().add(button_4);
		button_4.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				GoodsADD goodsAdd = new GoodsADD();
				goodsAdd.setVisible(true);
			}
		});
		
		JLabel label = new JLabel("商品编号:");
		label.setBounds(40, 354, 112, 32);
		getContentPane().add(label);
		
		textField = new JTextField();
		textField.setBounds(154, 358, 127, 26);
		getContentPane().add(textField);
		textField.setColumns(10);
		
		JButton button = new JButton("按编号查询");
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				String sql = "SELECT goodsID,goodsname,num,price FROM goods WHERE goodsid LIKE '%"+textField.getText()+"%'";
				Object[][] data = Select.getGoods(sql);
				df.setDataVector(data, header);
			}
		});
		button.setBounds(305, 355, 112, 30);
		getContentPane().add(button);
		
		this.addWindowListener(new WindowAdapter() {
			 
			public void windowClosing(WindowEvent e) {
				super.windowClosing(e);
				//加入动作
				GoodsManagement m = new GoodsManagement();
				m.setVisible(true);
			 }
		});
	}
	
	public static void main(String[] args) {
		GoodsManage t = new GoodsManage();
		t.setVisible(true);
	}
}

GoodsXG.Java

package com.ynavc.Vive;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

import com.ynavc.Bean.Goods;
import com.ynavc.Controller.Updata;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;

public class GoodsXG extends JFrame {
	private JTextField id,name,num,price;
	private JButton button;
	private JButton button_1;
	
	int goodsid;
	
	public GoodsXG(Goods goods) {
		super("商品管理系统");
		this.setBounds(0, 0, 400, 450);
		this.setLocationRelativeTo(null);//让窗口在屏幕中间显示
		this.setResizable(false);//让窗口大小不可改变
		getContentPane().setLayout(null);
		
		JLabel label = new JLabel("商品编号:");
		label.setBounds(85, 89, 87, 22);
		getContentPane().add(label);
		
		id = new JTextField();
		id.setBounds(147, 90, 142, 21);
		getContentPane().add(id);
		id.setColumns(10);
		
		JLabel label_1 = new JLabel("商品名称");
		label_1.setBounds(85, 139, 87, 22);
		getContentPane().add(label_1);
		
		name = new JTextField();
		name.setColumns(10);
		name.setBounds(147, 140, 142, 21);
		getContentPane().add(name);
		
		JLabel label_2 = new JLabel("数量:");
		label_2.setBounds(85, 193, 87, 22);
		getContentPane().add(label_2);
		
		num = new JTextField();
		num.setColumns(10);
		num.setBounds(147, 194, 142, 21);
		getContentPane().add(num);
		
		JLabel label_3 = new JLabel("单价:");
		label_3.setBounds(85, 241, 87, 22);
		getContentPane().add(label_3);
		
		price = new JTextField();
		price.setColumns(10);
		price.setBounds(147, 242, 142, 21);
		getContentPane().add(price);
		
		goodsid = goods.getGoodsID();
		id.setText(Integer.toString(goods.getGoodsID()));
		name.setText(goods.getGoodsName());
		num.setText(Integer.toString(goods.getNum()));
		price.setText(goods.getPrice());
		
		button = new JButton("确定");
		button.setBounds(78, 317, 93, 23);
		getContentPane().add(button);
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				String addId = id.getText();
				String addName = name.getText();
				String addNum = num.getText();
				String addPrice = num.getText();
				if (addName.equals("")||addName.equals("")||addNum.equals("")||addPrice.equals("")) {
					JOptionPane.showMessageDialog(null, "请完整输入要修改的数据");
				} else {
					String sql="UPDATE goods SET "+"Goodsid='"+addId+"',Goodsname='"+addName+"',num='"+addNum+"',price='"+addPrice+"'where goodsid="+goodsid;
					int result = Updata.addData(sql);
					if (result>0) {
						JOptionPane.showMessageDialog(null, "修改成功!");
		                JOptionPane.showMessageDialog(null, "记得刷新一下哦!");
						dispose();
//						GoodsManage i = new GoodsManage();
//						i.setVisible(true);
					} else {
						JOptionPane.showMessageDialog(null, "修改失败!");
					}
				}

			}
		});
		
		button_1 = new JButton("取消");
		button_1.setBounds(208, 317, 93, 23);
		getContentPane().add(button_1);
		button_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				dispose();
			}
		});
		
	}
	public static void main(String[] args) {
		GoodsXG g = new GoodsXG(null);
		g.setVisible(true);
	}
}

GoodsADD.Java

package com.ynavc.Vive;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

import com.ynavc.Bean.Goods;
import com.ynavc.Controller.Updata;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;

public class GoodsADD extends JFrame {
	private JTextField id,name,num,price;
	private JButton button;
	private JButton button_1;
	
	public GoodsADD() {
		super("商品管理系统");
		this.setBounds(0, 0, 400, 450);
		this.setLocationRelativeTo(null);//让窗口在屏幕中间显示
		this.setResizable(false);//让窗口大小不可改变
		getContentPane().setLayout(null);
		
		JLabel label = new JLabel("商品编号:");
		label.setBounds(85, 89, 87, 22);
		getContentPane().add(label);
		
		id = new JTextField();
		id.setBounds(147, 90, 142, 21);
		getContentPane().add(id);
		id.setColumns(10);
		
		JLabel label_1 = new JLabel("商品名称");
		label_1.setBounds(85, 139, 87, 22);
		getContentPane().add(label_1);
		
		name = new JTextField();
		name.setColumns(10);
		name.setBounds(147, 140, 142, 21);
		getContentPane().add(name);
		
		JLabel label_2 = new JLabel("数量:");
		label_2.setBounds(85, 193, 87, 22);
		getContentPane().add(label_2);
		
		num = new JTextField();
		num.setColumns(10);
		num.setBounds(147, 194, 142, 21);
		getContentPane().add(num);
		
		JLabel label_3 = new JLabel("单价:");
		label_3.setBounds(85, 241, 87, 22);
		getContentPane().add(label_3);
		
		price = new JTextField();
		price.setColumns(10);
		price.setBounds(147, 242, 142, 21);
		getContentPane().add(price);
		
		button = new JButton("确定");
		button.setBounds(78, 317, 93, 23);
		getContentPane().add(button);
		button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				String addId = id.getText();
				String addName = name.getText();
				String addNum = num.getText();
				String addPrice = num.getText();
				if (addName.equals("")||addName.equals("")||addNum.equals("")||addPrice.equals("")) {
					JOptionPane.showMessageDialog(null, "请完整输入要添加的数据");
				} else {
					String sql="INSERT INTO goods VALUES("+addId+",'"+addName+"','"+addNum+"','"+addPrice+"')";
					int result = Updata.addData(sql);
					if (result>0) {
						JOptionPane.showMessageDialog(null, "添加成功!");
		                JOptionPane.showMessageDialog(null, "记得刷新一下哦!");
						dispose();
//						GoodsManage i = new GoodsManage();
//						i.setVisible(true);
					} else {
						JOptionPane.showMessageDialog(null, "添加失败!");
					}
				}

			}
		});
		
		button_1 = new JButton("取消");
		button_1.setBounds(208, 317, 93, 23);
		getContentPane().add(button_1);
		button_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				dispose();
			}
		});
		
	}
}

特别说明:

项目中有一处代码错误,导致添加商品中的价格会获取到数量,请将【GoodsXG.Java】文件中的变量num改为price。

「超市管理系统——商品管理」 · Java Swing + MySQL JDBC开发

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