一次测试

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

@@ -12,7 +12,7 @@ public class Home extends JFrame implements ActionListener {
     JMenuItem StockMenuItem,InventoryMenuItem,SalesMenuItem;
 
     Home() {
-        super("城市进销存信息管理系统");
+        super("超市进销存信息管理系统");
         menuBar = new JMenuBar();
         menu = new JMenu("菜单");
         StockMenuItem = new JMenuItem("库存信息管理");

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

@@ -49,7 +49,7 @@ public class Main extends JFrame implements ActionListener {
             String sql = "select * from user where username='"+tf1.getText()+"' and password='"+tf2.getText()+"'"; ;
             try {
                 ResultSet rs = jdbc.query(sql);
-                jdbc.close();
+
                 if(rs.next()&&tf3.getText().equals(jl5.getText())) {
                     JOptionPane.showMessageDialog(null, "登录成功");
                     new Home();
@@ -70,4 +70,5 @@ public class Main extends JFrame implements ActionListener {
     public static void main(String[] args) {
         new  Main();
     }
+
 }

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

@@ -37,6 +37,7 @@ public class SalesProductManagement extends JFrame implements ActionListener {
         text10=new JTextField(5);
 
         btn1=new JButton("结算");
+        btn1.addActionListener(this);
 
 
         add(panel1);
@@ -70,9 +71,35 @@ public class SalesProductManagement extends JFrame implements ActionListener {
         setSize(500,500);
         setLocationRelativeTo(null);
         setVisible(true);
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 添加窗口关闭功能
     }
     @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）
+                int appleCount = text3.getText().trim().isEmpty() ? 0 : Integer.parseInt(text3.getText().trim());
+                int bananaCount = text6.getText().trim().isEmpty() ? 0 : Integer.parseInt(text6.getText().trim());
+                int orangeCount = text9.getText().trim().isEmpty() ? 0 : Integer.parseInt(text9.getText().trim());
+
+                // 计算总金额
+                double total = (applePrice * appleCount) + (bananaPrice * bananaCount) + (orangePrice * orangeCount);
+
+                // 显示结果，保留两位小数
+                text10.setText(String.format("%.2f元", total));
+            } catch (NumberFormatException ex) {
+                // 处理输入非数字的情况
+                JOptionPane.showMessageDialog(this, "请输入有效的数字", "输入错误", JOptionPane.ERROR_MESSAGE);
+            }
+        }
+    }
+    public static void main(String[] args) {
+        new  SalesProductManagement();
     }
 }