86 lines
3.6 KiB
Java
86 lines
3.6 KiB
Java
package assignment1;
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import java.math.BigDecimal;
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import java.sql.Connection;
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import java.sql.DriverManager;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.Scanner;
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public class ProductAdditionAndInquiry {
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private static final String DBURL = "jdbc:mysql://localhost:3306/xiaoshou?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT";
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public static void main(String[] args) {
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Scanner scanner = new Scanner(System.in);
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int choice;
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try (Connection conn = DriverManager.getConnection(DBURL)) {
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do {
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System.out.println("===超市商品管理维护====");
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System.out.println("1、输入商品");
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System.out.println("2、查询商品");
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System.out.println("3、退出");
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System.out.print("请选择（1-3）：");
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choice = scanner.nextInt();
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scanner.nextLine();
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switch (choice) {
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case 1:
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addProduct(scanner, conn);
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break;
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case 2:
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queryProduct(scanner, conn);
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break;
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case 3:
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System.out.println("退出系统");
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break;
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default:
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System.out.println("无效选择，请重新选择（1-3）：");
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}
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} while (choice != 3);
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} catch (SQLException e) {
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e.printStackTrace();
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}
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}
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private static void addProduct(Scanner scanner, Connection conn) throws SQLException {
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System.out.print("请输入商品信息（格式：条形码，商品名称，单价，供应商）：");
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String input = scanner.nextLine();
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String[] productInfo = input.split("，");
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String tiaoma = productInfo[0];
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PreparedStatement checkStmt = conn.prepareStatement("SELECT COUNT(*) FROM t_shangping WHERE tiaoma = ?");
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checkStmt.setString(1, tiaoma);
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ResultSet rs = checkStmt.executeQuery();
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rs.next();
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if (rs.getInt(1) > 0) {
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System.out.println("条形码不能重复，请重新输入");
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return;
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}
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PreparedStatement insertStmt = conn.prepareStatement(
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"INSERT INTO t_shangping (tiaoma, mingcheng, danjia, gongyingshang) VALUES (?, ?, ?, ?)");
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insertStmt.setString(1, tiaoma);
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insertStmt.setString(2, productInfo[1]);
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insertStmt.setBigDecimal(3, new BigDecimal(productInfo[2]));
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insertStmt.setString(4, productInfo[3]);
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insertStmt.executeUpdate();
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System.out.println("增加成功");
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}
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private static void queryProduct(Scanner scanner, Connection conn) throws SQLException {
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System.out.print("请输入查询的商品名称：");
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String nameQuery = scanner.nextLine();
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PreparedStatement queryStmt = conn.prepareStatement("SELECT * FROM t_shangping WHERE mingcheng LIKE ?");
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queryStmt.setString(1, "%" + nameQuery + "%");
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ResultSet rs = queryStmt.executeQuery();
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System.out.println("满足条件的记录总共" + rs.getFetchSize() + "条，信息如下：");
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System.out.println("序号\t条形码\t商品名称\t单价\t供应商");
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int count = 1;
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while (rs.next()) {
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System.out.println(count++ + "\t" +
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rs.getString("tiaoma") + "\t" +
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rs.getString("mingcheng") + "\t" +
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rs.getBigDecimal("danjia") + "\t" +
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rs.getString("gongyingshang"));
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}
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}
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}
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