HQL连接查询【重要】

9、连接查询【重要】
* 内连
* 外连接（左连接/右连接）
参见：JoinQueryTest.java

内连---(默认)

1. //Liststudents=session.createQuery("selectc.name,s.namefromStudentsjoins.classesc").list();
2. Liststudents=session.createQuery("selectc.name,s.namefromStudentsinnerjoins.classesc").list();
3. for(Iteratoriter=students.iterator();iter.hasNext();){
4. Object[]obj=(Object[])iter.next();
5. System.out.println(obj[0]+","+obj[1]);
6. }

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左连

1. Liststudents=session.createQuery("selectc.name,s.namefromClassescleftjoinc.studentss").list();

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右连

1. Liststudents=session.createQuery("selectc.name,s.namefromClassescrightjoinc.studentss").list();