完整版本

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

@@ -29,7 +29,7 @@ public class Home extends JFrame implements ActionListener {
 
     Home(String username) {
         super("超市进销存信息管理系统");
-        BackgroundPanel bgPanel = new BackgroundPanel("E:\\SuManagement\\images\\a.jpg");
+        BackgroundPanel bgPanel = new BackgroundPanel("images\\a.jpg");
         bgPanel.setLayout(new BorderLayout());
         setContentPane(bgPanel);
 
@@ -52,7 +52,7 @@ public class Home extends JFrame implements ActionListener {
                 userIdentity = rs.getString("identity");
             }
         } catch (SQLException e) {
-            throw new RuntimeException(e);
+            throw  new RuntimeException(e);
         }
         if(userIdentity.equals("admin")){
             UserMenu = new JButton("用户管理");

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

@@ -54,7 +54,7 @@ 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(rs.getString("username"));
+                    new  Home(rs.getString("username"));
                     this.setVisible(false);
                 }
                 else{

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

@@ -6,6 +6,7 @@ import javax.swing.event.TableModelListener;
 import javax.swing.table.DefaultTableModel;
 import javax.swing.table.TableCellRenderer;
 import java.awt.*;
+import java.awt.event.ActionEvent;
 import java.io.File;
 import java.sql.ResultSet;
 
@@ -15,7 +16,9 @@ public class SalesProductManagement extends JFrame {
     private DefaultTableModel tableModel;
     private JTextField totalField;
     private JButton checkoutBtn;
-    private String userIdentity; // 当前用户身份
+    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;
@@ -27,20 +30,30 @@ public class SalesProductManagement extends JFrame {
 
         JPanel mainPanel = new JPanel(new BorderLayout());
 
+        // 顶部按钮面板 - 新增
+        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"};
+        String[] columnNames = {"商品图片", "名称", "类别", "单价", "购买数量"};
-        tableModel = new DefaultTableModel(columnNames,0){
+        tableModel = new DefaultTableModel(columnNames, 0) {
             @Override
-            public boolean isCellEditable(int row, int column){
+            public boolean isCellEditable(int row, int column) {
-                if(column == 3) return "admin".equals(userIdentity); // 单价列 admin 可编辑
+                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){
+            public Class<?> getColumnClass(int column) {
-                if(column==0) return Icon.class;
+                if (column == 0) return Icon.class;
-                if(column==3) return Double.class;
+                if (column == 3) return Double.class;
-                if(column==4) return Integer.class;
+                if (column == 4) return Integer.class;
                 return String.class;
             }
         };
@@ -50,10 +63,11 @@ public class SalesProductManagement extends JFrame {
         // 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){
+            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
                 label.setHorizontalAlignment(JLabel.CENTER);
-                label.setIcon((Icon)value);
+                label.setIcon((Icon) value);
                 return label;
             }
         });
@@ -62,7 +76,7 @@ public class SalesProductManagement extends JFrame {
         mainPanel.add(scrollPane, BorderLayout.CENTER);
 
         // 结算面板
-        JPanel checkoutPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT,10,10));
+        JPanel checkoutPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 10, 10));
         checkoutBtn = new JButton("结算");
         totalField = new JTextField(10);
         totalField.setEditable(false);
@@ -74,41 +88,148 @@ public class SalesProductManagement extends JFrame {
         add(mainPanel);
 
         loadData();
-
+        setupEventListeners(); // 统一管理事件监听器
-        checkoutBtn.addActionListener(e -> calculateTotal());
-
-        // 监听单元格变化，修改后立即更新数据库
-        tableModel.addTableModelListener(e -> {
-            if(e.getType() == TableModelEvent.UPDATE){
-                int row = e.getFirstRow();
-                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());
-                }
-            }
-        });
 
         setVisible(true);
     }
 
-    private void loadData(){
+    // 新增：统一设置事件监听器
+    private void setupEventListeners() {
+        // 结算按钮事件
+        checkoutBtn.addActionListener(e -> calculateTotal());
+
+        // 上架按钮事件
+        addBtn.addActionListener(e -> addProductFromDatabase());
+
+        // 下架按钮事件
+        removeBtn.addActionListener(e -> removeSelectedProducts());
+
+        // 表格模型监听器，处理数据更新
+        tableModel.addTableModelListener(e -> {
+            if (e.getType() == TableModelEvent.UPDATE) {
+                int row = e.getFirstRow();
+                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());
+                }
+            }
+        });
+    }
+
+    // 新增：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());
+        }
+    }
+
+    // 新增：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{
+        try {
             ResultSet rs = jdbc.query("SELECT name,selling_price,quantity_sold,type,image_path FROM commodity");
             tableModel.setRowCount(0);
-            while(rs.next()){
+            while (rs.next()) {
                 String name = rs.getString("name");
                 double price = rs.getDouble("selling_price");
                 int quantity = rs.getInt("quantity_sold");
@@ -116,36 +237,36 @@ public class SalesProductManagement extends JFrame {
                 String imagePath = rs.getString("image_path");
 
                 ImageIcon icon = null;
-                if(imagePath!=null && !imagePath.isEmpty()){
+                if (imagePath != null && !imagePath.isEmpty()) {
-                    File imgFile = new File("images/"+imagePath);
+                    File imgFile = new File("images/" + imagePath);
-                    if(imgFile.exists()){
+                    if (imgFile.exists()) {
                         icon = new ImageIcon(new ImageIcon(imgFile.getAbsolutePath())
-                                .getImage().getScaledInstance(50,50,Image.SCALE_SMOOTH));
+                                .getImage().getScaledInstance(50, 50, Image.SCALE_SMOOTH));
                     }
                 }
 
-                Object[] row = {icon,name,type,price,quantity};
+                Object[] row = {icon, name, type, price, quantity};
                 tableModel.addRow(row);
             }
             rs.close();
             jdbc.close();
-        }catch(Exception e){
+        } 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());
         }
     }
 
-    private void calculateTotal(){
+    private void calculateTotal() {
         double total = 0.0;
-        for(int i=0;i<tableModel.getRowCount();i++){
+        for (int i = 0; i < tableModel.getRowCount(); i++) {
-            double price = Double.parseDouble(tableModel.getValueAt(i,3).toString());
+            double price = Double.parseDouble(tableModel.getValueAt(i, 3).toString());
-            int quantity = Integer.parseInt(tableModel.getValueAt(i,4).toString());
+            int quantity = Integer.parseInt(tableModel.getValueAt(i, 4).toString());
-            total += price*quantity;
+            total += price * quantity;
         }
-        totalField.setText(String.format("%.2f 元",total));
+        totalField.setText(String.format("%.2f 元", total));
     }
 
-    public static void main(String[] args){
+    public static void main(String[] args) {
         new SalesProductManagement("admin"); // 测试 admin
     }
 }