String?hql?=?"select?new?Order(o.customer,o.tradeDate,o.status,o.amount)"
????????????????+?"?from?Order?o"

上面是hql語句，在Order實體類里也加上了構造方法

????public?Order(){}
????
????public?Order(Customer?customer,?Date?tradeDate,?String?status,?Double?amount)?{
????????super();
????????this.customer?=?customer;
????????this.tradeDate?=?tradeDate;
????????this.status?=?status;
????????this.amount?=?amount;
????}

查詢的時候出現(xiàn)了以下問題

java.lang.ClassCastException:?org.hibernate.hql.internal.ast.tree.SqlNode?cannot?be?cast?to?org.hibernate.hql.internal.ast.tree.PathNode
????at?org.hibernate.hql.internal.ast.tree.ConstructorNode.prepare(ConstructorNode.java:149)
????at?org.hibernate.hql.internal.ast.HqlSqlWalker.processConstructor(HqlSqlWalker.java:1109)
????at?org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectExpr(HqlSqlBaseWalker.java:2328)
????at?org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectExprList(HqlSqlBaseWalker.java:2194)
????at?org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectClause(HqlSqlBaseWalker.java:1476)
????at?org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:573)
????at?org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301)
????at?org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:249)
????at?org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:278)
????at?org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:206)
????at?org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158)
????at?org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:131)
????at?org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:93)
????at?org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:167)
????at?org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:301)
????at?org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236)
????at?org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1836)
????at?com.imooc.model.OrderTest.test2(OrderTest.java:50)
????at?sun.reflect.NativeMethodAccessorImpl.invoke0(Native?Method)
????at?sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
????at?sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
????at?java.lang.reflect.Method.invoke(Method.java:498)
????at?org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
????at?org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
????at?org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
????at?org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
????at?org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
????at?org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:30)
????at?org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
????at?org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
????at?org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
????at?org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
????at?org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
????at?org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
????at?org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
????at?org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
????at?org.junit.runners.ParentRunner.run(ParentRunner.java:300)
????at?org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
????at?org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
????at?org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

想問問大家怎么解決這個事，我用其他的返回類型都是可以的，使用默認Order構造器返回全部字段結果也是成功的。