springboot ，spring-data,jpa

总结：今天主要讲解一下jpa 的动态sql，用过hibernate 都知道有个qbc(动态sql)，hql,

          jpa呢 加 jql,和标准查询

         动态sql ，主要重写 findAll 代码如下：

         

 解析sql 如下

select user0_.id as id1_0_, user0_.create_time as create_t2_0_, user0_.name as name3_0_ from user user0_ where (user0_.id in (1 , 2)) and cast(user0_.create_time as char)>? and user0_.create_time<? and user0_.id<=2 and (user0_.name like ? or user0_.id<=2) order by user0_.name desc limit ?, ?

　  基本 动态 sql 两种写法，上面就是第一种，动态构建 Predicate

     另一种解法是上面提到的 Example Matchers，动态构造ExampleMatcher即可 https://docs.spring.io/spring-data/jpa/docs/current/reference/html/

      参考链接

     http://www.voidcn.com/article/p-uzaenzpv-bss.html

 

https://github.com/wenhao/jpa-spec

https://www.cnblogs.com/xzmxddx/p/10975733.html

https://www.jianshu.com/p/8046233c0178

https://blog.csdn.net/liuyunyihao/article/details/81194007

https://zhuanlan.zhihu.com/p/24778422

https://wiselyman.iteye.com/blog/2378154

https://blog.csdn.net/cn_hhaip/article/details/89527666

https://blog.csdn.net/weixin_34379433/article/details/87537687

     

官方文档

 https://docs.spring.io/spring-data/jpa/docs/current/reference/html/

 

    https://blog.csdn.net/moshowgame/article/details/80058270  多表关联

https://www.cnblogs.com/alterem/p/11295358.html

 

其他文章

https://www.cnblogs.com/zimug/p/11790285.html