关于在Hibernate5.3.1中HQL语句使用"?"参数占位符运行报错的问题

在Hibernate5.3.1中,HQL语句使用"?"参数占位符运行报错:

Caused by: org.hibernate.QueryException:

Legacy-style query parameters (`?`) are no longer supported; use JPA-style ordinal parameters (e.g., `?1`) instead

并且:在Query查询时:setInteger()等方法已过时:



解决办法:

1.将HQL语句中的"?"改为JPA-style:

String hql = "from Student where age > ?0 and score < ?1";

2.方法过时问题解决:使用setParameter():

List<Student> list = createQuery .setParameter(0, 21) .setParameter(1, 95.0) .list();

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3.使用别名方式写HQL语句:

String hql = "from Student where age > :myage and score < :myscore";


总结:3种方式对应CODE:


// 1:将HQL语句中的"?"改为JPA-style:
String hql = "from Student where age > ?0 and score < ?1";	
			Query createQuery = session.createQuery(hql);
			List<Student> list = createQuery
					        .setInteger(0, 21)
						.setDouble(1, 95)
						.list();

// 2:使用setParameter():
String hql = "from Student where age > ?0 and score < ?1";    
            Query createQuery = session.createQuery(hql);
            List<Student> list = createQuery
                    .setParameter(0, 21)
                    .setParameter(1, 95.0)
                    .list();

// 3:别名:要求必须以冒号开头:
            String hql = "from Student where age > :myage and score < :myscore";   
            Query createQuery = session.createQuery(hql);
            List<Student> list = createQuery
                    .setInteger("myage", 21)
                    .setDouble("myscore", 95)
                    .list();


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转载自blog.csdn.net/m0_37922841/article/details/80560127