hibernate使用手写sql以及对结果list的处理

		Session sees=simpleDAO.getSessionFactory().openSession();
	    String sql = "select * from fhcb_08_tbl_user_right";
	    SQLQuery query = sees.createSQLQuery(sql);
	    List<?> list = query.list();
	    
		    for(Object o: list){
		    	Object[]objects=(Object[])o;
		    	
		         System.out.println((BigDecimal) objects[0]+ "::" + (String) objects[2]);
		    }

  其实hibernate查询出来的结果集不能直接用,得到的是一个Object数组,里面每个obj其实都是一个实体类,遍历拿到obj还不能直接当做实体对象操作,这个obj也是一个数组,元素顺序就是数据库字段顺序,取到obj里面的元素需要类型强转才能使用,正常操作。

如果类型拿不准,直接可以用objects[0].toString()方法取出里面的值。

            
对count的获取方法

String sql = "SELECT COUNT(*)  FROM fhcb_08_tbl_login_record WHERE USERNAME="+"'"+userName+"'";
            Session sees=simpleDAO.getSessionFactory().openSession();
            Query query = sees.createSQLQuery(sql).addScalar("COUNT(*)", StandardBasicTypes.INTEGER);
            int count=(Integer)query.uniqueResult(); 

  

1sess.createSQLQuery("SELECT NAME, BIRTHDATE FROM CATS")
2         .setResultTransformer(Transformers.aliasToBean(CatDTO.class))

1String sql = "SELECT ID as {c.id}, NAME as {c.name}, " + 
2         "BIRTHDATE as {c.birthDate}, MOTHER_ID as {c.mother}, {mother.*} " +
3         "FROM CAT_LOG c, CAT_LOG m WHERE {c.mother} = c.ID";
4
5List loggedCats = sess.createSQLQuery(sql)
6         .addEntity("cat", Cat.class)
7         .addEntity("mother", Cat.class).list();

  

 

  

原文地址:https://www.cnblogs.com/qinyios/p/11063393.html