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目录
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。
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。
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。
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);
*布局参考如下：
this.setLayout(null);
创建一个JPanel，其布局也为*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)
或
对象名.setBounds(int x,int y,int Width,int Height)
注意：在使用*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();
}
});
}
}