Hibernate框架HQL語句動態條件查詢

HQL語句動態條件查詢可以根據條件是否存在自動封裝hql語句的查詢條件,在這裏使用map集合來實現,也可以通過創建實體條件類來創建,但是創建類太多,如果使用該查詢頻率較高可以使用這種方法,實體類方法與map方法類似
其中自定義的條件名要與map鍵值對的key值相同,每一個and前要預留空格,否則會報org.hibernate.hql.ast.QuerySyntaxException異常

public static void zuhetiaojianchaxunformap(){
		Session session = HibernateUtil.getSession();
		Map<String, Object> map = new HashMap<>();
		map.put("hnianling", 25);
		map.put("lnianling", 22);
		map.put("xingbie", 1);
		map.put("xingming", "張三");
		StringBuffer s = new StringBuffer();
		s.append(" from Xuesheng where 1=1 ");
		if (map.get("hnianling")!=null){
			s.append(" and nianling<=:hnianling");
		}
		if(map.get("lnianling")!=null){
			s.append(" and nianling>=:lnianling");
		}
		if(map.get("xingbie")!=null){
			s.append(" and xingbie=:xingbie");
		}
		if(map.get("xingming")!=null){
			s.append(" and xingming=:xingming");
		}
	
		Query query = session.createQuery(s.toString());
		query.setProperties(map);
		List<Xuesheng> list = query.list();
		for (Xuesheng xuesheng : list) {
			System.out.println("姓名:"+xuesheng.getXingming()+",年齡:"+xuesheng.getNianling());
		}
	}

map裏有幾個條件sql語句中就會添加幾個,生成的sql語句如下:

 select
        xuesheng0_.xuehao as xuehao0_,
        xuesheng0_.xingming as xingming0_,
        xuesheng0_.xingbie as xingbie0_,
        xuesheng0_.nianling as nianling0_ 
    from
        xueshengbiao xuesheng0_ 
    where
        1=1 
        and xuesheng0_.nianling<=? 
        and xuesheng0_.nianling>=? 
        and xuesheng0_.xingbie=? 
        and xuesheng0_.xingming=?