java中如何连接mysql数据库

import java.sql.*;

public class MySQLConnector {
    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        
        try {
            // 加载MySQL驱动
            Class.forName("com.mysql.jdbc.Driver");
            
            // 建立数据库连接
            String url = "jdbc:mysql://localhost:3306/mydatabase";  // 数据库URL
            String user = "username";  // 数据库用户名
            String password = "password";  // 数据库密码
            conn = DriverManager.getConnection(url, user, password);
            
            // 执行查询
            stmt = conn.createStatement();
            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
            try {
                if (rs != null) {
                    rs.close();
                }
                if (stmt != null) {
                    stmt.close();
                }
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}