public class MySQL {

    final String JDBC_DRIVER = "com.mysql.cj.jdbc.Driver";

    final String DB_URL = "jdbc:mysql://localhost:3306/student_message?serverTimezone=UTC&characterEncoding=utf-8";

    final String USER = "root";

    final String PASS = "1234";

    Connection conn = null;

    Statement stmt = null;

    public void account_lo(int account,int password)//账户注册，参数为两个整形

    {

        try{

            // 注册 JDBC 驱动

            Class.forName(JDBC_DRIVER);

            // 打开链接

            System.out.println("连接数据库...");

            conn = DriverManager.getConnection(DB_URL,USER,PASS);

            // 执行查询

            System.out.println(" 实例化Statement对象...");

            stmt = conn.createStatement();

            String sql;

            sql = "insert into account values("+account+","+password+")";//向数据库中插入数据

            stmt.execute(sql);

            System.out.println("save successful");

            conn.close();

        }catch(SQLException se){

            // 处理 JDBC 错误

            se.printStackTrace();

        }catch(Exception e){

            // 处理 Class.forName 错误

            e.printStackTrace();

        }finally{

            // 关闭资源

            try{

                if(stmt!=null) stmt.close();

            }catch(SQLException se2){

            }// 什么都不做

            try{

                if(conn!=null) conn.close();

            }catch(SQLException se){

                se.printStackTrace();

            }

        }

        System.out.println("Goodbye!");

    }

}