安卓连接mysql数据库

String sql = "SELECT * FROM users WHERE username = ? AND password = ?";
PreparedStatement pstmt = connection.prepareStatement(sql);
pstmt.setString(1, username);
pstmt.setString(2, password);
ResultSet rs = pstmt.executeQuery();

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class MySQLConnector {
    private static final String URL = "jdbc:mysql://your_host:3306/your_database";
    private static final String USER = "your_username";
    private static final String PASSWORD = "your_password";

    public static void main(String[] args) {
        Connection connection = null;
        Statement statement = null;
        ResultSet resultSet = null;

        try {
            // 加载JDBC驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");

            // 建立连接
            connection = DriverManager.getConnection(URL, USER, PASSWORD);

            // 创建Statement对象
            statement = connection.createStatement();

            // 执行查询
            resultSet = statement.executeQuery("SELECT * FROM users");

            // 处理结果集
            while (resultSet.next()) {
                System.out.println("User ID: " + resultSet.getInt("id"));
                System.out.println("User Name: " + resultSet.getString("username"));
            }
        } catch (ClassNotFoundException | SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            try {
                if (resultSet != null) resultSet.close();
                if (statement != null) statement.close();
                if (connection != null) connection.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}