Type Exception Report
Message node to traverse cannot be null!
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
java.lang.IllegalArgumentException: node to traverse cannot be null!
org.hibernate.hql.internal.ast.util.NodeTraverser.traverseDepthFirst(NodeTraverser.java:46)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:284)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:187)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:142)
org.hibernate.engine.query.spi.HQLQueryPlan.(HQLQueryPlan.java:115)
org.hibernate.engine.query.spi.HQLQueryPlan.(HQLQueryPlan.java:76)
org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:150)
org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:302)
使用泛型写dao层的时候，出现了错误
错误的原因是from 和clazz.getName() 中间应该存在一个空格 否则生成的的HQL语句就会连到一起。
即 "from "+clazz.getName();注意空格