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Person類中包含有MyEvent這個類?

public class Person{private Long id;private String name;private MyEvent myEvent; }

一、HQL from語句?

1、結果類型：List<Person>

from Person 或者 from Person as p from Person as p where p.myEvent.title = :title 注意：hibernate3.2.3之前總是對的。?hibernate3.2.3之后如果myEvent是普通屬性或關聯的實體也是對的，如果myEvent是一個集合會出異常?因此hibernate推薦使用下面的方式： select p from Person as p inner join p.myEvent as e where e.title = :title

2、結果類型 List<Person,Event>

from Person as p inner join p.myEvent as event where event.title = : title 注：查詢出來是：是一個集合，集合元素是Person,myEvent組成的數組。?結果類型： List<Person,Event>? from Person as p left outer join p.myEvent as event where event.title = : title

注意：查詢出來是：是一個集合，集合元素是Person,myEvent組成的數組。?
? ? ? ? ? ?結果類型： List<Person,Event>

from Person as p right outer join p.myEvent as event where event.title = : title from Person as p full join p.myEvent as event where event.title = : title

第二：HQL select語句?

1、結果類型:? List<String>?

select p.name from Person as p

2、結果類型：List<Object[String,Person]>

select p.name,p from Person as p

3、結果類型：List<String,String>

select new List(p.name,p.address) from Person as p

4、結果類型：List<ClassTest>

select new ClassTest(p.name,p.address) from Person as p

? ?注意：前提ClassTest 類有兩個參數的構造器。?

5、結果類型：List<map<String,String>>

select new map(p.name as personName) from Person as p

?

轉載于:https://my.oschina.net/u/1754093/blog/707074

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