mysql java中文乱码

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class MySQLConnectionExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/your_database_name?useUnicode=true&characterEncoding=UTF-8";
        Properties props = new Properties();
        props.setProperty("user", "your_username");
        props.setProperty("password", "your_password");
        props.setProperty("useUnicode", "true");
        props.setProperty("characterEncoding", "UTF-8");

        try (Connection conn = DriverManager.getConnection(url, props)) {
            System.out.println("Connected to the database!");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}