摘要: 1、创建一个类将无参构造器变成私有权限(有两种实现方式) 点击查看代码 ``` package com.bh.test; public class Person { //(2) //private static Person person; //将person变量定义成静态变量,因为getInsta 阅读全文
posted @ 2023-05-27 11:51 liangkuan 阅读(22) 评论(0) 推荐(0)
摘要: 1、导入一个依赖 点击查看代码 ``` dom4j dom4j 1.6.1 ``` 2、有一个mapper.xml文件 点击查看代码 ``` insert into student values(#{id}, #{name}) delete from student where id=#{id} u 阅读全文
posted @ 2023-05-27 09:46 liangkuan 阅读(17) 评论(0) 推荐(0)