android留言板 mysql

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

public class MySQLConnector {
    private static final String DB_URL = "jdbc:mysql://your_database_server:3306/your_database_name";
    private static final String USER = "your_username";
    private static final String PASS = "your_password";

    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        try {
            // 注册JDBC驱动
            Class.forName("com.mysql.jdbc.Driver");

            // 打开连接
            System.out.println("Connecting to database...");
            conn = DriverManager.getConnection(DB_URL, USER, PASS);

            // 执行查询
            System.out.println("Creating statement...");
            stmt = conn.createStatement();
            String sql;
            sql = "SELECT id, message FROM messages";
            ResultSet rs = stmt.executeQuery(sql);

            // 处理结果集
            while (rs.next()) {
                int id = rs.getInt("id");
                String message = rs.getString("message");
                System.out.println("ID: " + id + ", Message: " + message);
            }

            // 关闭连接
            rs.close();
            stmt.close();
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}