org.hibernate.hql.ast.QuerySyntaxException: Unable to locate appropriate constructor on class xxx

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Exception in thread "main" org.hibernate.hql.ast.QuerySyntaxException: Unable to locate appropriate constructor on class [org.hibDemo.pojo.SysRole] [select new SysRole(u.rid,u.name) from org.hibDemo.pojo.SysRole u]at org.hibernate.hql.ast.QuerySyntaxException.convert(QuerySyntaxException.java:54)at org.hibernate.hql.ast.QuerySyntaxException.convert(QuerySyntaxException.java:47)at org.hibernate.hql.ast.ErrorCounter.throwQueryException(ErrorCounter.java:82)at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:261)at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:94)at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1651)at org.hibDemo.test.test.main(test.java:32)

原因是在做投影查询时实体类中没有提供对应的构造方法

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