java 链接mysql乱码

import java.sql.*;

public class MySQLExample {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/your_database_name?useUnicode=yes&characterEncoding=UTF-8";
        String user = "your_username";
        String password = "your_password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            String sql = "SELECT * FROM your_table_name";
            try (Statement stmt = conn.createStatement();
                 ResultSet rs = stmt.executeQuery(sql)) {
                while (rs.next()) {
                    String data = rs.getString("your_column_name");
                    System.out.println(data);
                }
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}