Update

src/SupermarketProductImport.java

@@ -0,0 +1,126 @@
+import java.io.*;
+import java.sql.*;
+import java.util.Scanner;
+import org.apache.poi.ss.usermodel.*;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+
+public class SupermarketProductImport {
+    private static final String DB_URL = "jdbc:mysql://localhost:3306/xiaoshou?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT";
+    private static final String USER = "root";
+    private static final String PASS = "yourpassword";
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        while (true) {
+            System.out.println("====****超市商品管理维护====");
+            System.out.println("1、从excel中导入数据");
+            System.out.println("2、从文本文件导入数据");
+            System.out.println("3、返回主菜单");
+            System.out.print("请选择（1-3）：");
+
+            int choice = scanner.nextInt();
+            scanner.nextLine(); // Consume newline
+
+            switch (choice) {
+                case 1:
+                    importFromExcel();
+                    break;
+                case 2:
+                    importFromTxt();
+                    break;
+                case 3:
+                    System.out.println("返回主菜单");
+                    return;
+                default:
+                    System.out.println("无效选择，请重新输入");
+            }
+        }
+    }
+
+    private static void importFromExcel() {
+        String filePath = "商品信息.xls";
+        int importedCount = 0;
+
+        try (Connection conn = DriverManager.getConnection(DB_URL, USER, PASS);
+                Workbook workbook = new XSSFWorkbook(new FileInputStream(filePath))) {
+
+            Sheet sheet = workbook.getSheetAt(0);
+            for (Row row : sheet) {
+                if (row.getRowNum() == 0)
+                    continue; // Skip header row
+
+                String tiaoma = row.getCell(0).getStringCellValue();
+                String mingcheng = row.getCell(1).getStringCellValue();
+                double danjia = row.getCell(2).getNumericCellValue();
+                String gongyingshang = row.getCell(3).getStringCellValue();
+
+                if (!isBarcodeExists(conn, tiaoma)) {
+                    insertProduct(conn, tiaoma, mingcheng, danjia, gongyingshang);
+                    importedCount++;
+                }
+            }
+
+            System.out.println("成功从excel文件导入" + importedCount + "条商品数据");
+        } catch (SQLException | IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static void importFromTxt() {
+        String filePath = "商品信息.txt";
+        int importedCount = 0;
+
+        try (Connection conn = DriverManager.getConnection(DB_URL, USER, PASS);
+                BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
+
+            String line;
+            while ((line = reader.readLine()) != null) {
+                if (line.trim().isEmpty())
+                    continue; // Skip empty lines
+                String[] parts = line.split("\t");
+
+                if (parts.length < 4)
+                    continue; // Skip malformed lines
+
+                String tiaoma = parts[0].trim();
+                String mingcheng = parts[1].trim();
+                double danjia = Double.parseDouble(parts[2].trim());
+                String gongyingshang = parts[3].trim();
+
+                if (!isBarcodeExists(conn, tiaoma)) {
+                    insertProduct(conn, tiaoma, mingcheng, danjia, gongyingshang);
+                    importedCount++;
+                }
+            }
+
+            System.out.println("成功从文本文件导入" + importedCount + "条商品数据");
+        } catch (SQLException | IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static boolean isBarcodeExists(Connection conn, String tiaoma) throws SQLException {
+        String query = "SELECT COUNT(*) FROM t_shangping WHERE tiaoma = ?";
+        try (PreparedStatement pstmt = conn.prepareStatement(query)) {
+            pstmt.setString(1, tiaoma);
+            ResultSet rs = pstmt.executeQuery();
+            if (rs.next()) {
+                return rs.getInt(1) > 0;
+            }
+        }
+        return false;
+    }
+
+    private static void insertProduct(Connection conn, String tiaoma, String mingcheng, double danjia,
+            String gongyingshang) throws SQLException {
+        String query = "INSERT INTO t_shangping (tiaoma, mingcheng, danjia, gongyingshang) VALUES (?, ?, ?, ?)";
+        try (PreparedStatement pstmt = conn.prepareStatement(query)) {
+            pstmt.setString(1, tiaoma);
+            pstmt.setString(2, mingcheng);
+            pstmt.setDouble(3, danjia);
+            pstmt.setString(4, gongyingshang);
+            pstmt.executeUpdate();
+        }
+    }
+}