重命名查詢字段與實體管理器使用時

Question

誰能幫助我，我是新來的春天JPA 我想用本機查詢時，改變字段名，但是當我下面做顯示erorr。

EntityManager entityManager; 

String query = 
"SELECT cus.id, pLead.id leadId, cus.code custCode, cus.primaryName custName, " + 
"cus.primaryKhmerName custkhmerName, pLead.phoneNo, prot.englishName propertyType, " + 
"pro.houseno houseNo, pro.streetno streetNo, pLead.address " + 
"FROM Customer cus, Contract con, Property pro, PropertyType prot, Lead pLead " + 
"WHERE cus.id = con.customer AND prot.id = pro.propertyType AND pro.id = con.property AND cus.primaryLead = pLead.id "; 

List<Object> results = entityManager.createQuery(query).getResultList(); 

錯誤日誌

13:48:03,698 ERROR [internal.ast.ErrorCounter] line 1:25: unexpected token: leadId 
13:48:03,710 ERROR [internal.ast.ErrorCounter] line 1:25: unexpected token: leadId 
line 1:25: unexpected token: leadId 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.atom(HqlBaseParser.java:3556) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.unaryExpression(HqlBaseParser.java:3250) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.multiplyExpression(HqlBaseParser.java:3122) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.additiveExpression(HqlBaseParser.java:2828) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.concatenation(HqlBaseParser.java:568) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.relationalExpression(HqlBaseParser.java:2595) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.equalityExpression(HqlBaseParser.java:2456) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.negatedExpression(HqlBaseParser.java:2420) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.logicalAndExpression(HqlBaseParser.java:2336) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.logicalOrExpression(HqlBaseParser.java:2301) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.expression(HqlBaseParser.java:2011) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.aliasedExpression(HqlBaseParser.java:2254) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.selectedPropertiesList(HqlBaseParser.java:1391) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.selectClause(HqlBaseParser.java:1294) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.selectFrom(HqlBaseParser.java:1031) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.queryRule(HqlBaseParser.java:701) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.selectStatement(HqlBaseParser.java:294) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.statement(HqlBaseParser.java:157) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:267) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:181) 
    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 org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:291) 
    at sun.reflect.GeneratedMethodAccessor59.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
    at java.lang.reflect.Method.invoke(Unknown Source) 
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240) 
    at com.sun.proxy.$Proxy48.createQuery(Unknown Source) 
    at com.bnd.rems.service.SearchServiceImp.getSearchCustomer(SearchServiceImp.java:59) 
    at com.bnd.rems.service.NoneTradeServiceImp.removeItem(NoneTradeServiceImp.java:146) 
    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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) 
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96) 
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260) 
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204) 
    at com.sun.proxy.$Proxy73.removeItem(Unknown Source) 
    at com.bnd.rems.controller.NoneTradeController.removeItem(NoneTradeController.java:84) 
    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.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:219) 
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) 
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686) 
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:936) 
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:838) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:812) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:147) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 

Answer 1

嘗試把SQL關鍵字AS您的列名，這樣的別名之間：

String query = 
"SELECT cus.id, pLead.id AS leadId, cus.code AS custCode, cus.primaryName AS custName, " + 
"cus.primaryKhmerName AS custkhmerName, pLead.phoneNo, prot.englishName AS propertyType, " + 
"pro.houseno AS houseNo, pro.streetno AS streetNo, pLead.address " + 
"FROM Customer cus, Contract con, Property pro, PropertyType prot, Lead pLead " + 
"WHERE cus.id = con.customer AND prot.id = pro.propertyType AND pro.id = con.property AND cus.primaryLead = pLead.id "; 

它始終是一個很好用的做法AS關鍵字，因爲它是SQL-92標準。