HQL练习题2-慕课网

HQL练习题2

来源：8-1 课程总结

模棱0

2016-09-25 17:07

@Test

public void test() {

String hql = "select new com.abe.entity.Order(o.customer,o.tradeDate,o.status,o.amount) from Order o where o.tradeDate between '2015-05-01' and '2015-06-01' and o.status = '已发货' and o.amount > 1000 order by o.status asc,o.tradeDate desc,o.amount desc";

Query query = session.createQuery(hql);

List<Order> orders = query.list();

for (Order order : orders) {

System.out.println("客户:"+order.getCustomer().getName());

System.out.println("交易日期:"+order.getTradeDate());

System.out.println("订单状态:"+order.getStatus());

System.out.println("订单金额:"+order.getAmount());

}

org.hibernate.exception.SQLGrammarException: could not extract ResultSet

at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:82)

at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)

at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125)

at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110)

at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:61)

at org.hibernate.loader.Loader.getResultSet(Loader.java:2040)

at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1837)

at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1816)

at org.hibernate.loader.Loader.doQuery(Loader.java:900)

at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:342)

at org.hibernate.loader.Loader.doList(Loader.java:2526)

at org.hibernate.loader.Loader.doList(Loader.java:2512)

at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2342)

at org.hibernate.loader.Loader.list(Loader.java:2337)

at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:495)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:356)

at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195)

at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1269)

at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)

at com.abe.test.OrderTest.test(OrderTest.java:25)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

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:678)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ORDER order0_ inner join CUSTOMER customer1_ on order0_.CUSTOMER=customer1_.ID w' at line 1

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

at java.lang.reflect.Constructor.newInstance(Unknown Source)

at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)

at com.mysql.jdbc.Util.getInstance(Util.java:381)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2554)

at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1761)

at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1912)

at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:56)

... 40 more

还有一个问题就是Order的类名不写全的时候它6会报这样一个错：

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:142)

at org.hibernate.hql.internal.ast.HqlSqlWalker.processConstructor(HqlSqlWalker.java:1019)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectExpr(HqlSqlBaseWalker.java:2279)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectExprList(HqlSqlBaseWalker.java:2145)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectClause(HqlSqlBaseWalker.java:1451)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:571)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299)

at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:249)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:184)

at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:137)

at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:105)

at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80)

at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168)

at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:221)

at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:199)

at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1778)

at com.abe.test.OrderTest.test(OrderTest.java:24)