mysql怎么连接数据库服务器

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

public class MySQLExample {
    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        
        try {
            // 加载MySQL驱动程序
            Class.forName("com.mysql.cj.jdbc.Driver");
            
            // 创建数据库连接
            String url = "jdbc:mysql://localhost:3306/mydatabase";
            String username = "myuser";
            String password = "mypassword";
            conn = DriverManager.getConnection(url, username, password);
            
            // 创建Statement对象
            stmt = conn.createStatement();
            
            // 执行SQL查询语句
            String sql = "SELECT * FROM mytable";
            rs = stmt.executeQuery(sql);
            
            // 处理查询结果
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                System.out.println("ID: " + id + ", Name: " + name);
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭连接和资源
            try {
                if (rs != null) rs.close();
                if (stmt != null) stmt.close();
                if (conn != null) conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}