完整版

Reviewed-on: #5

src/main/java/com/example/Home.java

@@ -1,31 +1,67 @@
 package com.example;
 
 import javax.swing.*;
+import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.sql.ResultSet;
+import java.sql.SQLException;
 
 public class Home extends JFrame implements ActionListener {
 
     JMenuBar menuBar;
-    JMenu menu;
     //    库存菜单    进货菜单       销售菜单
-    JMenuItem StockMenuItem,InventoryMenuItem,SalesMenuItem;
+    JButton StockMenu,InventoryMenu,SalesMenu,UserMenu,LogoutMenu;
+    private String userIdentity;
+    class BackgroundPanel extends JPanel {
+        private Image bg;
+        public BackgroundPanel(String path) {
+            bg = new ImageIcon(path).getImage();
+        }
+        @Override
+        protected void paintComponent(Graphics g) {
+            super.paintComponent(g);
+            if (bg != null) {
+                g.drawImage(bg, 0, 0, getWidth(), getHeight(), this);
+            }
+        }
+    }
 
-    Home() {
+    Home(String username) {
         super("超市进销存信息管理系统");
+        BackgroundPanel bgPanel = new BackgroundPanel("images\\a.jpg");
+        bgPanel.setLayout(new BorderLayout());
+        setContentPane(bgPanel);
+
         menuBar = new JMenuBar();
-        menu = new JMenu("菜单");
+        StockMenu = new JButton("库存信息管理");
-        StockMenuItem = new JMenuItem("库存信息管理");
+        InventoryMenu = new JButton("进货信息管理");
-        InventoryMenuItem = new JMenuItem("进货信息管理");
+        SalesMenu = new JButton("销售信息管理");
-        SalesMenuItem = new JMenuItem("销售信息管理");
+        LogoutMenu = new JButton("退出登录");
-        menu.add(StockMenuItem);
+        menuBar.add(StockMenu);
-        menu.add(InventoryMenuItem);
+        menuBar.add(InventoryMenu);
-        menu.add(SalesMenuItem);
+        menuBar.add(SalesMenu);
-        menuBar.add(menu);
+        menuBar.add(LogoutMenu);
         setJMenuBar(menuBar);
-        StockMenuItem.addActionListener(this);
+        StockMenu.addActionListener(this);
-        InventoryMenuItem.addActionListener(this);
+        InventoryMenu.addActionListener(this);
-        SalesMenuItem.addActionListener(this);
+        SalesMenu.addActionListener(this);
+        LogoutMenu.addActionListener(this);
+        Jdbc jdbc = new Jdbc();
+        String sql = "select * from user where username='"+username+"'";
+        try {
+            ResultSet rs = jdbc.query(sql);
+            if(rs.next()){
+                userIdentity = rs.getString("identity");
+            }
+        } catch (SQLException e) {
+            throw  new RuntimeException(e);
+        }
+        if(userIdentity.equals("admin")){
+            UserMenu = new JButton("用户管理");
+            menuBar.add(UserMenu);
+            UserMenu.addActionListener(this);
+        }
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setSize(500,500);
         setLocationRelativeTo(null);
@@ -33,14 +69,24 @@ public class Home extends JFrame implements ActionListener {
     }
     @Override
     public void actionPerformed(ActionEvent e) {
-        if(e.getSource()==StockMenuItem){
+        if(e.getSource()==StockMenu){
             new StockProductManagement();
         }
-        if(e.getSource()==InventoryMenuItem){
+        if(e.getSource()==InventoryMenu){
             new InventoryProductManagement();
         }
-        if(e.getSource()==SalesMenuItem){
+        if(e.getSource()==SalesMenu){
-            new SalesProductManagement();
+            new SalesProductManagement(userIdentity);
+        }
+        if(e.getSource()==UserMenu){
+            new UserManagement();
+        }
+        if(e.getSource()==LogoutMenu){
+            new Main();
+            this.dispose();
         }
     }
+    public static void main(String[] args) {
+        new Home("admin");
+    }
 }

src/main/java/com/example/InventoryProductManagement.java

@@ -2,61 +2,100 @@ package com.example;
 
 import javax.swing.*;
 import javax.swing.table.DefaultTableModel;
+import javax.swing.table.TableCellRenderer;
 import java.awt.*;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
 public class InventoryProductManagement extends JFrame implements ActionListener {
-    JMenuBar menuBar;
+    private JMenuBar menuBar;
-    JMenu menu;
+    private JMenuItem menuItemAdd, menuItemDelete;
-    JMenuItem menuItem1,menuItem2,menuItem3;
     private JTable table;
     private DefaultTableModel tableModel;
-    InventoryProductManagement() {
+    private String selectedImagePath = null;
+
+    public InventoryProductManagement() {
         super("进货信息管理");
         menuBar = new JMenuBar();
         setJMenuBar(menuBar);
-        menu = new JMenu("菜单");
-        menuBar.add(menu);
-        menuItem1 = new JMenuItem("添加商品");
-        menuItem2 = new JMenuItem("删除商品");
-        menu.add(menuItem1);
-        menu.add(menuItem2);
-//        menu.add(menuItem3);
-        menuItem1.addActionListener(this);
-        menuItem2.addActionListener(this);
-//        menuItem3.addActionListener(this);
-        setSize(500,500);
-        setLocationRelativeTo(null);
-        // 表头
-        String[] columnNames = {"商品名称", "商品数量", "进货单价"};
-        tableModel = new DefaultTableModel(columnNames, 0);
-        table = new JTable(tableModel);
 
-        // 滚动面板
+        menuItemAdd = new JMenuItem("进货");
+        menuItemDelete = new JMenuItem("删除");
+        menuBar.add(menuItemAdd);
+        menuBar.add(menuItemDelete);
+
+        menuItemAdd.addActionListener(this);
+        menuItemDelete.addActionListener(this);
+
+        setSize(600, 500);
+        setLocationRelativeTo(null);
+
+        // 表格初始化
+        String[] columnNames = {"商品照片","商品名称","商品类别","商品数量（件）","进货单价（元）"};
+        tableModel = new DefaultTableModel(columnNames, 0) {
+            @Override
+            public Class<?> getColumnClass(int column) {
+                if (column == 0) return Icon.class;
+                return super.getColumnClass(column);
+            }
+
+            @Override
+            public boolean isCellEditable(int row, int column) {
+                return false;
+            }
+        };
+
+        table = new JTable(tableModel);
+        table.setRowHeight(60); // 设置行高以显示图片
+
+        // 自定义图片单元格渲染
+        table.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
+            JLabel label = new JLabel();
+            @Override
+            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
+                label.setHorizontalAlignment(JLabel.CENTER);
+                label.setIcon((Icon) value);
+                return label;
+            }
+        });
+
         JScrollPane scrollPane = new JScrollPane(table);
         add(scrollPane, BorderLayout.CENTER);
-
+        loadData(); // 初始化加载数据
-        // 初始化加载数据库数据
-        loadData();
         setVisible(true);
     }
 
+    // 加载数据库数据
     private void loadData() {
         Jdbc jdbc = new Jdbc();
         try {
-            ResultSet rs = jdbc.query("SELECT name,count,purchase_price,selling_price,profit,quantity_sold FROM commodity");
+            ResultSet rs = jdbc.query("SELECT name, type, count, purchase_price, image_path FROM commodity");
-            // 清空旧数据
+            tableModel.setRowCount(0); // 清空表格
-            tableModel.setRowCount(0);
-            // 填充新数据
             while (rs.next()) {
-                Object[] row = {
+                String name = rs.getString("name");
-                        rs.getString("name"),
+                String type = rs.getString("type");
-                        rs.getInt("count"),
+                int count = rs.getInt("count");
-                        rs.getDouble("purchase_price"),
+                double price = rs.getDouble("purchase_price");
-                };
+                String imagePath = rs.getString("image_path");
+
+                ImageIcon icon = null;
+                if (imagePath != null && !imagePath.isEmpty()) {
+                    File imgFile = new File("images/" + imagePath);
+                    if (imgFile.exists()) {
+                        icon = new ImageIcon(new ImageIcon(imgFile.getAbsolutePath())
+                                .getImage().getScaledInstance(50, 50, Image.SCALE_SMOOTH));
+                    }
+                }
+
+                Object[] row = {icon, name, type, count, price};
                 tableModel.addRow(row);
             }
             rs.close();
@@ -69,101 +108,156 @@ public class InventoryProductManagement extends JFrame implements ActionListener
 
     @Override
     public void actionPerformed(ActionEvent e) {
-        if (e.getSource() == menuItem1) {
+        if (e.getSource() == menuItemAdd) {
-            JFrame frame = new JFrame();
+            showAddProductWindow();
-            frame.setTitle("添加商品");
+        } else if (e.getSource() == menuItemDelete) {
-            frame.setLayout(new GridLayout(4, 2));
+            showDeleteProductWindow();
-            JLabel nameLabel = new JLabel("商品名称:");
-            JTextField nameField = new JTextField();
-            JLabel countLabel = new JLabel("商品数量:");
-            JTextField countField = new JTextField();
-            JLabel purchasePriceLabel = new JLabel("进货单价:");
-            JTextField purchasePriceField = new JTextField();
-            JButton addButton = new JButton("添加");
-            JButton cancelButton = new JButton("取消");
-            frame.add(nameLabel);
-            frame.add(nameField);
-            frame.add(countLabel);
-            frame.add(countField);
-            frame.add(purchasePriceLabel);
-            frame.add(purchasePriceField);
-            frame.add(addButton);
-            frame.add(cancelButton);
-            addButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    String name = nameField.getText();
-                    int count = Integer.parseInt(countField.getText());
-                    double purchasePrice = Double.parseDouble(purchasePriceField.getText());
-                    // 调用数据库添加方法
-                    Jdbc jdbc = new Jdbc();
-                    try {
-                        jdbc.update("INSERT INTO commodity (name, count, purchase_price,  quantity_sold) VALUES ('" + name + "', " + count + ", " + purchasePrice + ", " + 0 + ");");
-                        jdbc.close();
-                        // 刷新数据
-                        loadData();
-                        // 关闭弹窗
-                        frame.dispose();
-                    } catch (SQLException ex) {
-                        ex.printStackTrace();
-                        JOptionPane.showMessageDialog(frame, "添加商品失败: " + ex.getMessage());
-                    }
-                }
-            });
-            cancelButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    frame.dispose();
-                }
-            });
-            frame.setSize(300, 200);
-            frame.setLocationRelativeTo(null);
-            frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-            frame.setVisible(true);
-        }
-        else if (e.getSource() == menuItem2) {
-            JFrame frame = new JFrame();
-            frame.setTitle("删除商品");
-            frame.setLayout(new GridLayout(2, 2));
-            JLabel nameLabel = new JLabel("商品名称:");
-            JTextField nameField = new JTextField();
-            JButton deleteButton = new JButton("删除");
-            JButton cancelButton = new JButton("取消");
-            frame.add(nameLabel);
-            frame.add(nameField);
-            frame.add(deleteButton);
-            frame.add(cancelButton);
-            deleteButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    String name = nameField.getText();
-                    // 调用数据库删除方法
-                    Jdbc jdbc = new Jdbc();
-                    try {
-                        jdbc.update("DELETE FROM commodity WHERE name='" + name + "'");
-                        jdbc.close();
-                        // 刷新数据
-                        loadData();
-                        // 关闭弹窗
-                        frame.dispose();
-                    } catch (SQLException ex) {
-                        ex.printStackTrace();
-                        JOptionPane.showMessageDialog(frame, "删除商品失败: " + ex.getMessage());
-                    }
-                }
-            });
-            cancelButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    frame.dispose();
-                }
-            });
-            frame.setSize(300, 200);
-            frame.setLocationRelativeTo(null);
-            frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-            frame.setVisible(true);
         }
     }
+
+    private void showAddProductWindow() {
+        JFrame frame = new JFrame("添加商品");
+        frame.setLayout(new GridLayout(6,2));
+
+        JLabel nameLabel = new JLabel("商品名称:");
+        JTextField nameField = new JTextField();
+
+        JLabel countLabel = new JLabel("商品数量:");
+        JTextField countField = new JTextField();
+
+        JLabel purchasePriceLabel = new JLabel("进货单价:");
+        JTextField purchasePriceField = new JTextField();
+
+        JLabel typeLabel = new JLabel("商品类别:");
+        String[] categories = {"食品","生活用品","娱乐物品","学习物品","其他物品"};
+        JComboBox<String> typeComboBox = new JComboBox<>(categories);
+
+        JLabel imageLabel = new JLabel("商品图片:");
+        JButton chooseImageButton = new JButton("选择图片");
+
+        JButton addButton = new JButton("添加");
+        JButton cancelButton = new JButton("取消");
+
+        frame.add(nameLabel); frame.add(nameField);
+        frame.add(countLabel); frame.add(countField);
+        frame.add(purchasePriceLabel); frame.add(purchasePriceField);
+        frame.add(typeLabel); frame.add(typeComboBox);
+        frame.add(imageLabel); frame.add(chooseImageButton);
+        frame.add(addButton); frame.add(cancelButton);
+
+        // 图片选择事件
+        chooseImageButton.addActionListener(ev -> {
+            JFileChooser fileChooser = new JFileChooser();
+            fileChooser.setDialogTitle("选择商品图片");
+            fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
+            int result = fileChooser.showOpenDialog(frame);
+            if(result == JFileChooser.APPROVE_OPTION) {
+                File selectedFile = fileChooser.getSelectedFile();
+                selectedImagePath = selectedFile.getAbsolutePath();
+                JOptionPane.showMessageDialog(frame, "已选择图片: " + selectedFile.getName());
+            }
+        });
+
+        // 添加按钮事件
+        addButton.addActionListener(ev -> {
+            String name = nameField.getText();
+            int count;
+            double purchasePrice;
+            try {
+                count = Integer.parseInt(countField.getText());
+                purchasePrice = Double.parseDouble(purchasePriceField.getText());
+            } catch (NumberFormatException ex) {
+                JOptionPane.showMessageDialog(frame, "数量和价格必须为数字");
+                return;
+            }
+            String type = (String) typeComboBox.getSelectedItem();
+            String savedImageFileName = null;
+
+            if(selectedImagePath != null) {
+                try {
+                    File imageDir = new File("images");
+                    if(!imageDir.exists()) imageDir.mkdir();
+                    String extension = selectedImagePath.substring(selectedImagePath.lastIndexOf("."));
+                    savedImageFileName = name + System.currentTimeMillis() + extension;
+                    Path targetPath = Paths.get("images", savedImageFileName);
+                    Files.copy(Paths.get(selectedImagePath), targetPath, StandardCopyOption.REPLACE_EXISTING);
+                } catch (IOException ex) {
+                    ex.printStackTrace();
+                    JOptionPane.showMessageDialog(frame, "图片保存失败: " + ex.getMessage());
+                    return;
+                }
+            }
+
+            Jdbc jdbc = new Jdbc();
+            try {
+                String sql = "INSERT INTO commodity (name, count, purchase_price, quantity_sold, type, image_path) " +
+                        "VALUES ('"+name+"', "+count+", "+purchasePrice+", 0, '"+type+"', '"+(savedImageFileName != null ? savedImageFileName : "")+"');";
+                jdbc.update(sql);
+                jdbc.close();
+                loadData();
+                frame.dispose();
+            } catch (SQLException ex) {
+                ex.printStackTrace();
+                JOptionPane.showMessageDialog(frame,"添加商品失败: "+ex.getMessage());
+            }
+        });
+
+        cancelButton.addActionListener(ev -> frame.dispose());
+
+        frame.setSize(400, 300);
+        frame.setLocationRelativeTo(null);
+        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        frame.setVisible(true);
+    }
+
+    private void showDeleteProductWindow() {
+        JFrame frame = new JFrame("删除商品");
+        frame.setLayout(new GridLayout(2,2));
+        JLabel nameLabel = new JLabel("商品名称:");
+        JTextField nameField = new JTextField();
+        JButton deleteButton = new JButton("删除");
+        JButton cancelButton = new JButton("取消");
+        frame.add(nameLabel); frame.add(nameField);
+        frame.add(deleteButton); frame.add(cancelButton);
+
+        deleteButton.addActionListener(ev -> {
+            String name = nameField.getText();
+            Jdbc jdbc = new Jdbc();
+            try {
+                // 查询要删除的图片路径
+                ResultSet rs = jdbc.query("SELECT image_path FROM commodity WHERE name='"+name+"'");
+                String imagePath = null;
+                if(rs.next()) {
+                    imagePath = rs.getString("image_path");
+                }
+                rs.close();
+
+                // 删除数据库记录
+                jdbc.update("DELETE FROM commodity WHERE name='"+name+"'");
+                jdbc.close();
+
+                // 删除图片文件
+                if(imagePath != null && !imagePath.isEmpty()) {
+                    File imgFile = new File("images/"+imagePath);
+                    if(imgFile.exists()) imgFile.delete();
+                }
+
+                loadData();
+                frame.dispose();
+            } catch (SQLException ex) {
+                ex.printStackTrace();
+                JOptionPane.showMessageDialog(frame, "删除商品失败: "+ex.getMessage());
+            }
+        });
+
+        cancelButton.addActionListener(ev -> frame.dispose());
+
+        frame.setSize(300,200);
+        frame.setLocationRelativeTo(null);
+        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        frame.setVisible(true);
+    }
+
     public static void main(String[] args) {
         new InventoryProductManagement();
     }

src/main/java/com/example/Main.java

@@ -46,7 +46,6 @@ public class Main extends JFrame implements ActionListener {
 
     @Override
     public void actionPerformed(ActionEvent e) {
-
         if(e.getSource()==jb1){
             Jdbc jdbc = new Jdbc();
             String sql = "select * from user where username='"+tf1.getText()+"' and password='"+tf2.getText()+"'"; ;
@@ -54,7 +53,7 @@ public class Main extends JFrame implements ActionListener {
                 ResultSet rs = jdbc.query(sql);
                 if(rs.next()&&tf3.getText().equals(jb3.getText())) {
                     JOptionPane.showMessageDialog(null, "登录成功");
-                    new Home();
+                    new  Home(rs.getString("username"));
                     this.setVisible(false);
                 }
                 else{

src/main/java/com/example/SalesProductManagement.java

@@ -1,104 +1,267 @@
 package com.example;
 
 import javax.swing.*;
+import javax.swing.event.TableModelEvent;
+import javax.swing.table.DefaultTableModel;
+import javax.swing.table.TableCellRenderer;
 import java.awt.*;
-import java.awt.event.ActionEvent;
+import java.io.File;
-import java.awt.event.ActionListener;
+import java.sql.ResultSet;
 
-public class SalesProductManagement extends JFrame implements ActionListener {
+public class SalesProductManagement extends JFrame {
 
-    JButton btn1;
+    private JTable table;
-    JLabel lab1,lab2,lab3,lab4,lab5,lab6,lab7;
+    private DefaultTableModel tableModel;
-    JTextField text2,text3,text5,text6,text8,text9,text10;
+    private JTextField totalField;
-    //    JPasswordField passwordfile;
+    private JButton checkoutBtn;
-    JPanel panel1,panel2,panel3;
+    private JButton addBtn;       // 新增：上架按钮
+    private JButton removeBtn;    // 新增：下架按钮
+    private String userIdentity;  // 当前用户身份
 
+    public SalesProductManagement(String identity) {
+        this.userIdentity = identity;
 
-
+        setTitle("商品销售信息管理");
-    SalesProductManagement(){
+        setSize(900, 600);
-        super("销售信息管理");
-        panel1 = new JPanel();
-        panel2 = new JPanel();
-        panel3 = new JPanel();
-        lab1=new JLabel("名称",JLabel.CENTER);
-        lab2=new JLabel("单价",JLabel.CENTER);
-        lab3=new JLabel("数量",JLabel.CENTER);
-        lab4=new JLabel("总计：",JLabel.CENTER);
-        lab5=new JLabel("苹果",JLabel.CENTER);
-        lab6=new JLabel("香蕉",JLabel.CENTER);
-        lab7=new JLabel("橘子",JLabel.CENTER);
-
-        text2=new JTextField("2"+"元",JTextField.CENTER);
-        text3=new JTextField(3);
-        text5=new JTextField("3"+"元",JTextField.CENTER);
-        text6=new JTextField(3);
-        text8=new JTextField("5"+"元",JTextField.CENTER);
-        text9=new JTextField(3);
-        text10=new JTextField(5);
-
-        btn1=new JButton("结算");
-        btn1.addActionListener(this);
-
-
-        add(panel1);
-        panel1.setLayout(new GridLayout(1,3,5,5));
-        panel1.add(lab1);
-        panel1.add(lab2);
-        panel1.add(lab3);
-        panel1.setMaximumSize(new Dimension(Integer.MAX_VALUE, 40));
-        add(panel2);
-        panel2.setLayout(new GridLayout(3,3,5,5));
-        panel2.add(lab5);
-        panel2.add(text2);
-        panel2.add(text3);
-        panel2.add(lab6);
-        panel2.add(text5);
-        panel2.add(text6);
-        panel2.add(lab7);
-        panel2.add(text8);
-        panel2.add(text9);
-        panel2.setMaximumSize(new Dimension(Integer.MAX_VALUE, 120));
-        add(panel3);
-        panel3.setLayout(new GridLayout(1,3,5,5));
-        panel3.add(btn1);
-        panel3.add(lab4);
-        panel3.add(text10);
-        panel3.setMaximumSize(new Dimension(Integer.MAX_VALUE, 40));
-
-
-
-        setLayout(new GridLayout(3,1));
-        setSize(500,500);
         setLocationRelativeTo(null);
+        setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
+
+        JPanel mainPanel = new JPanel(new BorderLayout());
+
+        // 顶部按钮面板
+        JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.LEFT, 10, 10));
+        addBtn = new JButton("上架商品");
+        removeBtn = new JButton("从界面下架");
+        // 只有管理员可以上架商品
+        addBtn.setEnabled("admin".equals(userIdentity));
+        topPanel.add(addBtn);
+        topPanel.add(removeBtn);
+        mainPanel.add(topPanel, BorderLayout.NORTH);
+
+        // 表格
+        String[] columnNames = {"商品图片", "名称", "类别", "单价", "购买数量"};
+        tableModel = new DefaultTableModel(columnNames, 0) {
+            @Override
+            public boolean isCellEditable(int row, int column) {
+                if (column == 3) return "admin".equals(userIdentity); // 单价列 admin 可编辑
+                return column == 4; // 购买数量列所有用户可编辑
+            }
+
+            @Override
+            public Class<?> getColumnClass(int column) {
+                if (column == 0) return Icon.class;
+                if (column == 3) return Double.class;
+                if (column == 4) return Integer.class;
+                return String.class;
+            }
+        };
+        table = new JTable(tableModel);
+        table.setRowHeight(60);
+
+        // 图片渲染器
+        table.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
+            JLabel label = new JLabel();
+
+            @Override
+            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
+                label.setHorizontalAlignment(JLabel.CENTER);
+                label.setIcon((Icon) value);
+                return label;
+            }
+        });
+
+        JScrollPane scrollPane = new JScrollPane(table);
+        mainPanel.add(scrollPane, BorderLayout.CENTER);
+
+        // 结算面板
+        JPanel checkoutPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 10, 10));
+        checkoutBtn = new JButton("结算");
+        totalField = new JTextField(10);
+        totalField.setEditable(false);
+        checkoutPanel.add(new JLabel("总金额:"));
+        checkoutPanel.add(totalField);
+        checkoutPanel.add(checkoutBtn);
+        mainPanel.add(checkoutPanel, BorderLayout.SOUTH);
+
+        add(mainPanel);
+
+        loadData();
+        setupEventListeners(); // 统一管理事件监听器
+
         setVisible(true);
     }
-    @Override
-    public void actionPerformed(ActionEvent e) {
-        // 判断事件源是否为结算按钮
-        if (e.getSource() == btn1) {
-            try {
-                // 获取单价（从文本框提取数字部分）
-                double applePrice = Double.parseDouble(text2.getText().replace("元", ""));
-                double bananaPrice = Double.parseDouble(text5.getText().replace("元", ""));
-                double orangePrice = Double.parseDouble(text8.getText().replace("元", ""));
 
-                // 获取数量（处理空输入情况）
+    // 设置事件监听器
-                int appleCount = text3.getText().trim().isEmpty() ? 0 : Integer.parseInt(text3.getText().trim());
+    private void setupEventListeners() {
-                int bananaCount = text6.getText().trim().isEmpty() ? 0 : Integer.parseInt(text6.getText().trim());
+        // 结算按钮事件
-                int orangeCount = text9.getText().trim().isEmpty() ? 0 : Integer.parseInt(text9.getText().trim());
+        checkoutBtn.addActionListener(e -> calculateTotal());
-
+        // 上架按钮事件
-                // 计算总金额
+        addBtn.addActionListener(e -> addProductFromDatabase());
-                double total = (applePrice * appleCount) + (bananaPrice * bananaCount) + (orangePrice * orangeCount);
+        // 下架按钮事件
-
+        removeBtn.addActionListener(e -> removeSelectedProducts());
-                // 显示结果，保留两位小数
+        // 表格模型监听器，处理数据更新
-                text10.setText(String.format("%.2f元", total));
+        tableModel.addTableModelListener(e -> {
-            } catch (NumberFormatException ex) {
+            if (e.getType() == TableModelEvent.UPDATE) {
-                // 处理输入非数字的情况
+                int row = e.getFirstRow();
-                JOptionPane.showMessageDialog(this, "请输入有效的数字", "输入错误", JOptionPane.ERROR_MESSAGE);
+                int col = e.getColumn();
+                String name = tableModel.getValueAt(row, 1).toString(); // 商品名称
+                try {
+                    Jdbc jdbc = new Jdbc();
+                    if (col == 3 && "admin".equals(userIdentity)) { // 单价
+                        double price = Double.parseDouble(tableModel.getValueAt(row, 3).toString());
+                        jdbc.update("UPDATE commodity SET selling_price=" + price + " WHERE name='" + name + "'");
+                    } else if (col == 4) { // 购买数量
+                        int quantity = Integer.parseInt(tableModel.getValueAt(row, 4).toString());
+                        jdbc.update("UPDATE commodity SET quantity_sold=" + quantity + " WHERE name='" + name + "'");
+                    }
+                    jdbc.close();
+                } catch (Exception ex) {
+                    ex.printStackTrace();
+                    JOptionPane.showMessageDialog(this, "更新数据库失败: " + ex.getMessage());
+                }
             }
+        });
+    }
+
+    // 从数据库上架商品（选择数据库中未显示的商品添加到界面）
+    private void addProductFromDatabase() {
+        try {
+            Jdbc jdbc = new Jdbc();
+            // 查询数据库中所有商品
+            ResultSet rs = jdbc.query("SELECT name, selling_price, quantity_sold, type, image_path FROM commodity");
+
+            // 收集已在界面上的商品名称
+            DefaultListModel<String> availableProducts = new DefaultListModel<>();
+            while (rs.next()) {
+                String name = rs.getString("name");
+                boolean isInTable = false;
+
+                // 检查商品是否已在表格中
+                for (int i = 0; i < tableModel.getRowCount(); i++) {
+                    if (tableModel.getValueAt(i, 1).toString().equals(name)) {
+                        isInTable = true;
+                        break;
+                    }
+                }
+
+                if (!isInTable) {
+                    availableProducts.addElement(name);
+                }
+            }
+            rs.close();
+
+            if (availableProducts.size() == 0) {
+                JOptionPane.showMessageDialog(this, "所有商品已上架！");
+                jdbc.close();
+                return;
+            }
+
+            // 显示可选商品列表供选择
+            JList<String> productList = new JList<>(availableProducts);
+            productList.setSelectionMode(ListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
+            int result = JOptionPane.showConfirmDialog(
+                    this,
+                    new JScrollPane(productList),
+                    "选择要上架的商品",
+                    JOptionPane.OK_CANCEL_OPTION
+            );
+
+            if (result == JOptionPane.OK_OPTION) {
+                // 上架选中的商品
+                for (String selectedName : productList.getSelectedValuesList()) {
+                    ResultSet productRs = jdbc.query(
+                            "SELECT name, selling_price, quantity_sold, type, image_path FROM commodity WHERE name='" + selectedName + "'"
+                    );
+                    if (productRs.next()) {
+                        String name = productRs.getString("name");
+                        double price = productRs.getDouble("selling_price");
+                        int quantity = productRs.getInt("quantity_sold");
+                        String type = productRs.getString("type");
+                        String imagePath = productRs.getString("image_path");
+
+                        ImageIcon icon = null;
+                        if (imagePath != null && !imagePath.isEmpty()) {
+                            File imgFile = new File("images/" + imagePath);
+                            if (imgFile.exists()) {
+                                icon = new ImageIcon(new ImageIcon(imgFile.getAbsolutePath())
+                                        .getImage().getScaledInstance(50, 50, Image.SCALE_SMOOTH));
+                            }
+                        }
+
+                        Object[] row = {icon, name, type, price, quantity};
+                        tableModel.addRow(row);
+                    }
+                    productRs.close();
+                }
+                JOptionPane.showMessageDialog(this, "已成功上架选中商品！");
+            }
+            jdbc.close();
+        } catch (Exception e) {
+            e.printStackTrace();
+            JOptionPane.showMessageDialog(this, "上架商品失败: " + e.getMessage());
         }
     }
+
+    // 从界面下架商品（仅从当前界面移除，不删除数据库记录）
+    private void removeSelectedProducts() {
+        int[] selectedRows = table.getSelectedRows();
+        if (selectedRows.length == 0) {
+            JOptionPane.showMessageDialog(this, "请先选择要下架的商品！");
+            return;
+        }
+
+        // 从后往前删除，避免索引混乱
+        for (int i = selectedRows.length - 1; i >= 0; i--) {
+            tableModel.removeRow(selectedRows[i]);
+        }
+
+        JOptionPane.showMessageDialog(this, "已成功下架 " + selectedRows.length + " 件商品！");
+        calculateTotal(); // 更新总金额
+    }
+
+    private void loadData() {
+        Jdbc jdbc = new Jdbc();
+        try {
+            ResultSet rs = jdbc.query("SELECT name,selling_price,quantity_sold,type,image_path FROM commodity");
+            tableModel.setRowCount(0);
+            while (rs.next()) {
+                String name = rs.getString("name");
+                double price = rs.getDouble("selling_price");
+                int quantity = rs.getInt("quantity_sold");
+                String type = rs.getString("type");
+                String imagePath = rs.getString("image_path");
+
+                ImageIcon icon = null;
+                if (imagePath != null && !imagePath.isEmpty()) {
+                    File imgFile = new File("images/" + imagePath);
+                    if (imgFile.exists()) {
+                        icon = new ImageIcon(new ImageIcon(imgFile.getAbsolutePath())
+                                .getImage().getScaledInstance(50, 50, Image.SCALE_SMOOTH));
+                    }
+                }
+
+                Object[] row = {icon, name, type, price, quantity};
+                tableModel.addRow(row);
+            }
+            rs.close();
+            jdbc.close();
+        } catch (Exception e) {
+            e.printStackTrace();
+            JOptionPane.showMessageDialog(this, "加载数据失败: " + e.getMessage());
+        }
+    }
+
+    private void calculateTotal() {
+        double total = 0.0;
+        for (int i = 0; i < tableModel.getRowCount(); i++) {
+            double price = Double.parseDouble(tableModel.getValueAt(i, 3).toString());
+            int quantity = Integer.parseInt(tableModel.getValueAt(i, 4).toString());
+            total += price * quantity;
+        }
+        totalField.setText(String.format("%.2f 元", total));
+    }
+
     public static void main(String[] args) {
-        new  SalesProductManagement();
+        new SalesProductManagement("admin"); // 测试 admin
     }
 }

src/main/java/com/example/StockProductManagement.java

@@ -2,56 +2,82 @@ package com.example;
 
 import javax.swing.*;
 import javax.swing.table.DefaultTableModel;
+import javax.swing.table.TableCellRenderer;
 import java.awt.*;
-import java.awt.event.ActionEvent;
+import java.io.File;
-import java.awt.event.ActionListener;
 import java.sql.ResultSet;
-import java.sql.SQLException;
+import java.util.HashSet;
+import java.util.Set;
 
-public class StockProductManagement extends JFrame implements ActionListener {
+public class StockProductManagement extends JFrame {
 
-    JMenuBar menuBar;
-    JMenu menu;
-    JMenuItem menuItem1,menuItem2,menuItem3;
     private JTable table;
     private DefaultTableModel tableModel;
-    StockProductManagement() {
+    private JTextField searchField;
+    private JComboBox<String> categoryComboBox;
+    private JButton resetButton;
+
+    public StockProductManagement() {
         super("库存商品信息管理");
-        menuBar = new JMenuBar();
+
-        setJMenuBar(menuBar);
+        setSize(900, 550);
-        menu = new JMenu("菜单");
-        menuBar.add(menu);
-        menuItem1 = new JMenuItem("添加商品");
-        menuItem2 = new JMenuItem("删除商品");
-        menu.add(menuItem1);
-        menu.add(menuItem2);
-//        menu.add(menuItem3);
-        menuItem1.addActionListener(this);
-        menuItem2.addActionListener(this);
-//        menuItem3.addActionListener(this);
-        setSize(500,500);
         setLocationRelativeTo(null);
 
-        // 表头
+        //顶部工具面板
-        String[] columnNames = {"商品名称", "商品数量", "进货单价", "销售单价", "单个利润","销售数量"};
+        JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
+
+        topPanel.add(new JLabel("搜索商品名称:"));
+        searchField = new JTextField(15);
+        topPanel.add(searchField);
+
+        JButton searchButton = new JButton("搜索");
+        topPanel.add(searchButton);
+
+        topPanel.add(new JLabel("筛选类别:"));
+        categoryComboBox = new JComboBox<>();
+        categoryComboBox.addItem("全部");
+        topPanel.add(categoryComboBox);
+
+        resetButton = new JButton("重置");
+        topPanel.add(resetButton);
+
+        add(topPanel, BorderLayout.NORTH);
+
+        // 表格
+        String[] columnNames = {"商品照片","商品名称","商品类别","商品数量","进货单价","销售单价","单个利润","销售数量"};
         tableModel = new DefaultTableModel(columnNames, 0){
             @Override
             public boolean isCellEditable(int row, int column) {
-                return column == 5;
+                return column == 7; // 只有销售数量可编辑
+            }
+            @Override
+            public Class<?> getColumnClass(int column) {
+                if(column == 0) return Icon.class;
+                return super.getColumnClass(column);
             }
         };
         table = new JTable(tableModel);
+        table.setRowHeight(60);
 
-        // 监听单元格编辑完成事件，自动更新数据库
+        // 图片渲染
+        table.getColumnModel().getColumn(0).setCellRenderer(new TableCellRenderer() {
+            JLabel label = new JLabel();
+            @Override
+            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
+                label.setHorizontalAlignment(JLabel.CENTER);
+                label.setIcon((Icon)value);
+                return label;
+            }
+        });
+
+        // 销售数量更新
         table.getModel().addTableModelListener(e -> {
             int row = e.getFirstRow();
             int column = e.getColumn();
-
+            if(column == 7) {
-            if (column == 5) { // 销售数量列
+                String name = (String)tableModel.getValueAt(row, 1);
-                String name = (String) tableModel.getValueAt(row, 0); // 商品名称
                 Object value = tableModel.getValueAt(row, column);
-
+                if(value != null && !value.toString().trim().isEmpty()) {
-                if (value != null && !value.toString().trim().isEmpty()) {
                     try {
                         int quantitySold = Integer.parseInt(value.toString().trim());
                         Jdbc jdbc = new Jdbc();
@@ -64,143 +90,88 @@ public class StockProductManagement extends JFrame implements ActionListener {
             }
         });
 
-
-        // 滚动面板
         JScrollPane scrollPane = new JScrollPane(table);
         add(scrollPane, BorderLayout.CENTER);
 
-        // 初始化加载数据库数据
+
-        loadData();
+        searchButton.addActionListener(ev -> reloadData());
+        categoryComboBox.addActionListener(ev -> reloadData());
+        resetButton.addActionListener(ev -> {  // 重置功能
+            searchField.setText("");
+            categoryComboBox.setSelectedItem("全部");
+            reloadData();
+        });
+
+        reloadData(); // 初次加载
         setVisible(true);
     }
-    @Override
-    public void actionPerformed(ActionEvent e) {
-        if (e.getSource() == menuItem1) {
-            JFrame frame = new JFrame();
-            frame.setTitle("添加商品");
-            frame.setLayout(new GridLayout(5, 2));
-            JLabel nameLabel = new JLabel("商品名称:");
-            JTextField nameField = new JTextField();
-            JLabel countLabel = new JLabel("商品数量:");
-            JTextField countField = new JTextField();
-            JLabel purchasePriceLabel = new JLabel("进货单价:");
-            JTextField purchasePriceField = new JTextField();
-            JLabel sellingPriceLabel = new JLabel("销售单价:");
-            JTextField sellingPriceField = new JTextField();
-            JButton addButton = new JButton("添加");
-            JButton cancelButton = new JButton("取消");
-            frame.add(nameLabel);
-            frame.add(nameField);
-            frame.add(countLabel);
-            frame.add(countField);
-            frame.add(purchasePriceLabel);
-            frame.add(purchasePriceField);
-            frame.add(sellingPriceLabel);
-            frame.add(sellingPriceField);
-            frame.add(addButton);
-            frame.add(cancelButton);
-            addButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    String name = nameField.getText();
-                    int count = Integer.parseInt(countField.getText());
-                    double purchasePrice = Double.parseDouble(purchasePriceField.getText());
-                    double sellingPrice = Double.parseDouble(sellingPriceField.getText());
-                    // 调用数据库添加方法
-                    Jdbc jdbc = new Jdbc();
-                    try {
-                        jdbc.update("INSERT INTO commodity (name, count, purchase_price, selling_price, profit) VALUES ('" + name + "', " + count + ", " + purchasePrice + ", " + sellingPrice + ", " + (sellingPrice - purchasePrice) + ", 0);");
-                        jdbc.close();
-                        // 刷新数据
-                        loadData();
-                        // 关闭弹窗
-                        frame.dispose();
-                    } catch (SQLException ex) {
-                        ex.printStackTrace();
-                        JOptionPane.showMessageDialog(frame, "添加商品失败: " + ex.getMessage());
-                    }
-                }
-            });
-            cancelButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    frame.dispose();
-                }
-            });
-            frame.setSize(300, 200);
-            setLocationRelativeTo(null);
-            frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-            frame.setVisible(true);
-        }
-        else if (e.getSource() == menuItem2) {
-            JFrame frame = new JFrame();
-            frame.setTitle("删除商品");
-            frame.setLayout(new GridLayout(2, 2));
-            JLabel nameLabel = new JLabel("商品名称:");
-            JTextField nameField = new JTextField();
-            JButton deleteButton = new JButton("删除");
-            JButton cancelButton = new JButton("取消");
-            frame.add(nameLabel);
-            frame.add(nameField);
-            frame.add(deleteButton);
-            frame.add(cancelButton);
-            deleteButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    String name = nameField.getText();
-                    // 调用数据库删除方法
-                    Jdbc jdbc = new Jdbc();
-                    try {
-                        jdbc.update("DELETE FROM commodity WHERE name='" + name + "'");
-                        jdbc.close();
-                        // 刷新数据
-                        loadData();
-                        // 关闭弹窗
-                        frame.dispose();
-                    } catch (SQLException ex) {
-                        ex.printStackTrace();
-                        JOptionPane.showMessageDialog(frame, "删除商品失败: " + ex.getMessage());
-                    }
-                }
-            });
-            cancelButton.addActionListener(new ActionListener() {
-                @Override
-                public void actionPerformed(ActionEvent e) {
-                    frame.dispose();
-                }
-            });
-            frame.setSize(300, 200);
-            setLocationRelativeTo(null);
-            frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-            frame.setVisible(true);
-        }
-    }
 
-    private void loadData() {
+    /**
+     * 按条件加载数据
+     */
+    private void reloadData(){
+        String keyword = searchField.getText().trim();
+        String category = (String) categoryComboBox.getSelectedItem();
+
         Jdbc jdbc = new Jdbc();
-        try {
+        try{
-            ResultSet rs = jdbc.query("SELECT name,count,purchase_price,selling_price,profit,quantity_sold FROM commodity");
+            StringBuilder sql = new StringBuilder("SELECT name,count,purchase_price,selling_price,profit,quantity_sold,type,image_path FROM commodity WHERE 1=1 ");
-            // 清空旧数据
+            if(!keyword.isEmpty()){
+                sql.append("AND name LIKE '%").append(keyword).append("%' ");
+            }
+            if(category != null && !"全部".equals(category)){
+                sql.append("AND type='").append(category).append("' ");
+            }
+
+            ResultSet rs = jdbc.query(sql.toString());
             tableModel.setRowCount(0);
-            // 填充新数据
+            Set<String> categories = new HashSet<>();
-            while (rs.next()) {
+
-                Object[] row = {
+            while(rs.next()){
-                        rs.getString("name"),
+                String name = rs.getString("name");
-                        rs.getInt("count"),
+                int count = rs.getInt("count");
-                        rs.getDouble("purchase_price"),
+                double purchasePrice = rs.getDouble("purchase_price");
-                        rs.getDouble("selling_price"),
+                double sellingPrice = rs.getDouble("selling_price");
-                        rs.getDouble("profit"),
+                double profit = rs.getDouble("profit");
-                };
+                String quantitySold = rs.getString("quantity_sold");
+                String type = rs.getString("type");
+                String imagePath = rs.getString("image_path");
+
+                categories.add(type);
+
+                ImageIcon icon = null;
+                if(imagePath!=null && !imagePath.isEmpty()){
+                    File imgFile = new File("images/"+imagePath);
+                    if(imgFile.exists()){
+                        icon = new ImageIcon(new ImageIcon(imgFile.getAbsolutePath())
+                                .getImage().getScaledInstance(50,50,Image.SCALE_SMOOTH));
+                    }
+                }
+
+                Object[] row = {icon,name,type,count,purchasePrice,sellingPrice,profit,quantitySold};
                 tableModel.addRow(row);
             }
             rs.close();
             jdbc.close();
-        } catch (SQLException e) {
+
+            // 更新类别下拉框
+            String selected = (String) categoryComboBox.getSelectedItem();
+            categoryComboBox.removeAllItems();
+            categoryComboBox.addItem("全部");
+            for(String c : categories){
+                categoryComboBox.addItem(c);
+            }
+            if(selected != null && !selected.isEmpty()){
+                categoryComboBox.setSelectedItem(selected);
+            }
+
+        }catch(Exception e){
             e.printStackTrace();
-            JOptionPane.showMessageDialog(this, "加载数据失败: " + e.getMessage());
+            JOptionPane.showMessageDialog(this,"加载数据失败: "+e.getMessage());
         }
     }
-    public static void main(String[] args) {
+
+    public static void main(String[] args){
         new StockProductManagement();
     }
 }

src/main/java/com/example/UserManagement.java

@@ -0,0 +1,196 @@
+package com.example;
+
+import javax.swing.*;
+import javax.swing.table.DefaultTableModel;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class UserManagement extends JFrame implements ActionListener {
+
+    JMenuBar menuBar;
+    JMenuItem addItem, deleteItem, updateItem, refreshItem;
+    private JTable table;
+    private DefaultTableModel tableModel;
+
+    public UserManagement() {
+        super("用户信息管理");
+
+        // 菜单栏
+        menuBar = new JMenuBar();
+        setJMenuBar(menuBar);
+
+        addItem = new JMenuItem("添加用户");
+        deleteItem = new JMenuItem("删除用户");
+        updateItem = new JMenuItem("修改用户");
+        refreshItem = new JMenuItem("刷新数据");
+
+        menuBar.add(addItem);
+        menuBar.add(deleteItem);
+        menuBar.add(updateItem);
+        menuBar.add(refreshItem);
+
+        addItem.addActionListener(this);
+        deleteItem.addActionListener(this);
+        updateItem.addActionListener(this);
+        refreshItem.addActionListener(this);
+
+        // 表格模型
+        String[] columnNames = {"用户名", "密码", "身份"};
+        tableModel = new DefaultTableModel(columnNames, 0) {
+            @Override
+            public boolean isCellEditable(int row, int column) {
+                return false; // 不直接在表格里改
+            }
+        };
+        table = new JTable(tableModel);
+
+        JScrollPane scrollPane = new JScrollPane(table);
+        add(scrollPane, BorderLayout.CENTER);
+
+        setSize(600, 400);
+        setLocationRelativeTo(null);
+
+        // 初始加载
+        loadData();
+        setVisible(true);
+    }
+
+    // 加载 identity=user 的数据
+    private void loadData() {
+        Jdbc jdbc = new Jdbc();
+        try {
+            ResultSet rs = jdbc.query("SELECT username,password,identity FROM user WHERE identity='user'");
+            tableModel.setRowCount(0);
+            while (rs.next()) {
+                Object[] row = {
+                        rs.getString("username"),
+                        rs.getString("password"),
+                        rs.getString("identity")
+                };
+                tableModel.addRow(row);
+            }
+            rs.close();
+            jdbc.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+            JOptionPane.showMessageDialog(this, "加载数据失败: " + e.getMessage());
+        }
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent e) {
+        // 添加用户
+        if (e.getSource() == addItem) {
+            JFrame frame = new JFrame("添加用户");
+            frame.setLayout(new GridLayout(3, 2));
+            JLabel nameLabel = new JLabel("用户名:");
+            JTextField nameField = new JTextField();
+            JLabel passLabel = new JLabel("密码:");
+            JPasswordField passField = new JPasswordField();
+            JButton addButton = new JButton("添加");
+            JButton cancelButton = new JButton("取消");
+
+            frame.add(nameLabel); frame.add(nameField);
+            frame.add(passLabel); frame.add(passField);
+            frame.add(addButton); frame.add(cancelButton);
+
+            addButton.addActionListener(ev -> {
+                String username = nameField.getText();
+                String password = passField.getText();
+
+                Jdbc jdbc = new Jdbc();
+                try {
+                    jdbc.update("INSERT INTO user (username,password,identity) VALUES ('"
+                            + username + "','" + password + "','user')");
+                    jdbc.close();
+                    loadData();
+                    frame.dispose();
+                } catch (SQLException ex) {
+                    JOptionPane.showMessageDialog(frame, "添加失败: " + ex.getMessage());
+                }
+            });
+
+            cancelButton.addActionListener(ev -> frame.dispose());
+            frame.setSize(400, 250);
+            frame.setLocationRelativeTo(null);
+            frame.setVisible(true);
+        }
+
+        // 删除用户
+        else if (e.getSource() == deleteItem) {
+            int row = table.getSelectedRow();
+            if (row == -1) {
+                JOptionPane.showMessageDialog(this, "请先选择要删除的用户！");
+                return;
+            }
+            String username = (String) tableModel.getValueAt(row, 0);
+            int confirm = JOptionPane.showConfirmDialog(this, "确定删除用户: " + username + " ?", "确认", JOptionPane.YES_NO_OPTION);
+            if (confirm == JOptionPane.YES_OPTION) {
+                Jdbc jdbc = new Jdbc();
+                try {
+                    jdbc.update("DELETE FROM user WHERE username='" + username + "'");
+                    jdbc.close();
+                    loadData();
+                } catch (SQLException ex) {
+                    JOptionPane.showMessageDialog(this, "删除失败: " + ex.getMessage());
+                }
+            }
+        }
+
+        // 修改用户
+        else if (e.getSource() == updateItem) {
+            int row = table.getSelectedRow();
+            if (row == -1) {
+                JOptionPane.showMessageDialog(this, "请先选择要修改的用户！");
+                return;
+            }
+            String oldUsername = (String) tableModel.getValueAt(row, 0);
+
+            JFrame frame = new JFrame("修改用户");
+            frame.setLayout(new GridLayout(4, 2));
+            JTextField nameField = new JTextField((String) tableModel.getValueAt(row, 0));
+            JTextField passField = new JTextField((String) tableModel.getValueAt(row, 1));
+            JTextField identityField = new JTextField((String) tableModel.getValueAt(row, 2));
+            JButton saveButton = new JButton("保存");
+            JButton cancelButton = new JButton("取消");
+
+            frame.add(new JLabel("用户名:")); frame.add(nameField);
+            frame.add(new JLabel("密码:")); frame.add(passField);
+            frame.add(new JLabel("身份:")); frame.add(identityField);
+            frame.add(saveButton); frame.add(cancelButton);
+
+            saveButton.addActionListener(ev -> {
+                String username = nameField.getText();
+                String password = passField.getText();
+                String identity = identityField.getText();
+
+                Jdbc jdbc = new Jdbc();
+                try {
+                    jdbc.update("UPDATE user SET username='" + username + "', password='" + password + "', identity='" + identity + "' WHERE username='" + oldUsername + "'");
+                    jdbc.close();
+                    loadData();
+                    frame.dispose();
+                } catch (SQLException ex) {
+                    JOptionPane.showMessageDialog(frame, "修改失败: " + ex.getMessage());
+                }
+            });
+
+            cancelButton.addActionListener(ev -> frame.dispose());
+            frame.setSize(400, 250);
+            frame.setLocationRelativeTo(null);
+            frame.setVisible(true);
+        }
+
+        // 刷新数据
+        else if (e.getSource() == refreshItem) {
+            loadData();
+        }
+    }
+
+    public static void main(String[] args) {
+        new UserManagement();
+    }
+}