mysql 中文java代码

import java.sql.*;

public class MySQLTest {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=utf8mb4";
        String user = "username";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            // 创建表
            String createTableSQL = "CREATE TABLE IF NOT EXISTS users (" +
                                    "id INT AUTO_INCREMENT PRIMARY KEY," +
                                    "name VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci)";
            try (Statement stmt = conn.createStatement()) {
                stmt.executeUpdate(createTableSQL);
            }

            // 插入中文数据
            String insertSQL = "INSERT INTO users (name) VALUES (?)";
            try (PreparedStatement pstmt = conn.prepareStatement(insertSQL)) {
                pstmt.setString(1, "张三");
                pstmt.executeUpdate();
            }

            // 查询并打印中文数据
            String selectSQL = "SELECT * FROM users";
            try (Statement stmt = conn.createStatement();
                 ResultSet rs = stmt.executeQuery(selectSQL)) {
                while (rs.next()) {
                    System.out.println("ID: " + rs.getInt("id") + ", Name: " + rs.getString("name"));
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}