- 优化 import java classes
//消除不用的 import classes
Shift+Command + A , then Enter
- Find java file
Control + Shift + O
- Find keyword in projects
Control + Shift + F
标签：java
用java JPA进行多表join
例如我们有如下多表查询
select A.id, A.name, B.name2, C.name2 from A,B,C where A.id=B.bid and B.name3 = C.id 我们用Join连接 JPA tables
// Root rootpath Entity A,B,C in B has relasionship B.name3 = C Join b_path = rootpath.join("id");
Join c_path = b_path.join("name3");Java 小知识
1. Get client timezone
Calendar.getInstance().getTimeZone()
2. JPA sql 输出
//queryType:TypedQuery