YJT180的博客

一.为什么要使用@Transactional注解举例：创建三个表 book money couponcreate table book( id char(36) primary key comment '主键', name varchar(12) comment '书名', quantity int(5) comment '数量', price float(5,2) comm...

一.创建表--user_info表create table user_info( id int(2) primary key, user_name varchar(12) unique, password varchar(15) not null, real_name varchar(8) not null, age int(3)...

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1.创建spring Bean配置文件<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocat...

一.如何调用构造方法1.配置xml文件<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context...

1.创建UserinfoDao类和Test类package com.jd.userinfo.dao;import org.springframework.stereotype.Service;@Service//添加了service注释public class UserInfoDao { }package com.jd.test;import org.springf...