Question

我正在尝试使用多个表中的连接创建查询并将列表作为参数传递。我把null＆amp;查询字符串中的空检查。但是我在QueryNode.getDataType上得到NullPointerException。以下是查询和例外。

    query = em.createQuery("select avg(kpi.duration), kpi.taskId from KPI kpi, User user, UserRole userRole, Shop shop where " +
            "(user.clientId = :customer or :customer is null) and (kpi.userId in :users or :users is null or :users = '' ) and " +
            "(userRole.role in :roles or :roles is null or :roles = '') and (shop.shopName in :shopNames or :shopNames is null or :shopNames = '') " +
            "and kpi.userId = userRole.userId and kpi.userId = user.id and kpi.userId = shop.userId group by kpi.taskId");

    query.setParameter("customer",customer);
    query.setParameter(“users”,users);
    query.setParameter(“roles”,roles);
    query.setParameter("shopNames", shopNames);

    if (query != null){
        List<Object[]> result = query.getResultList();
}

用户，角色＆amp; shopNames是列表，customer是字符串。我已经创建了查询，只使用带有null检查的字符串，并且它有效。但是，对于列表，它会出现以下错误。任何建议如何在不检查if else逻辑中的每个参数的情况下执行此操作。

[请求处理失败;嵌套异常是带有根本原因的java.lang.NullPointerException] java.lang.NullPointerException at org.hibernate.hql.internal.ast.tree.QueryNode.getDataType（QueryNode.java:164）在 org.hibernate.hql.internal.ast.tree.AbstractNullnessCheckNode.extractDataType（AbstractNullnessCheckNode.java:118）在 org.hibernate.hql.internal.ast.tree.AbstractNullnessCheckNode.initialize（AbstractNullnessCheckNode.java:52）在 org.hibernate.hql.internal.ast.HqlSqlWalker.prepareLogicOperator（HqlSqlWalker.java:1224）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.comparisonExpr（HqlSqlBaseWalker.java:4218）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1935）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1888）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1885）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1863）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1860）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1860）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1860）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1860）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1860）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.whereClause（HqlSqlBaseWalker.java:794）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query（HqlSqlBaseWalker.java:595）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement（HqlSqlBaseWalker.java:299）在 org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement（HqlSqlBaseWalker.java:247）在 org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze（QueryTranslatorImpl.java:248）在 org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile（QueryTranslatorImpl.java:183）在 org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile（QueryTranslatorImpl.java:136）在 org.hibernate.engine.query.spi.HQLQueryPlan。（HQLQueryPlan.java:105）在 org.hibernate.engine.query.spi.HQLQueryPlan。（HQLQueryPlan.java:80）在 org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan（QueryPlanCache.java:168）在 org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan（AbstractSessionImpl.java:219）在org.hibernate.internal.SessionImpl.list（SessionImpl.java:1240）at org.hibernate.internal.QueryImpl.list（QueryImpl.java:101）at org.hibernate.ejb.QueryImpl.getResultList（QueryImpl.java:257）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:606）at org.springframework.orm.jpa.SharedEntityManagerCreator $ DeferredQueryInvocationHandler.invoke（SharedEntityManagerCreator.java:311）在com.sun.proxy。$ Proxy161.getResultList（未知来源）at com.ge.turbo.repository.KpiTaskRepositoryCustomImpl.getKPIData（KpiTaskRepositoryCustomImpl.java:93） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:606）at org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor.executeMethodOn（RepositoryFactorySupport.java:333）在 org.springframework.data.repository.core.support.RepositoryFactorySupport $ QueryExecutorMethodInterceptor.invoke（RepositoryFactorySupport.java:308）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:172）在 org.springframework.transaction.interceptor.TransactionInterceptor $ 1.proceedWithInvocation（TransactionInterceptor.java:96）在 org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction（TransactionAspectSupport.java:260）在 org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:94）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:172）在 org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke（PersistenceExceptionTranslationInterceptor.java:155）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:172）在 org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor $ LockModePopulatingMethodIntercceptor.invoke（LockModeRepositoryPostProcessor.java:92）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:172）在 org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke（ExposeInvocationInterceptor.java:91）在 org.springframework.aop.framework.ReflectiveMethodInvocation.proceed（ReflectiveMethodInvocation.java:172）在 org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:204）在com.sun.proxy。$ Proxy96.getKPIData（未知来源）at com.ge.turbo.service.KpiTaskServiceImpl.getKPIData（KpiTaskServiceImpl.java:71） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:606）at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection（AopUtils.java:317）在 org.springframework.aop.framework.JdkDynamicAopProxy.invoke（JdkDynamicAopProxy.java:198）在com.sun.proxy。$ Proxy97.getKPIData（未知来源）at com.ge.turbo.controller.KpiTaskController.getKPIData（KpiTaskController.java:77） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:606）at org.springframework.web.method.support.InvocableHandlerMethod.invoke（InvocableHandlerMethod.java:219）在 org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:132）在 org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:104）在 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod（RequestMappingHandlerAdapter.java:745）在 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:686）在 org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:80）在 org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:925）在 org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:856）在 org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:936）在 org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:827）在javax.servlet.http.HttpServlet.service（HttpServlet.java:621）at org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:812）在javax.servlet.http.HttpServlet.service（HttpServlet.java:728）at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:305）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:330）在 org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke（FilterSecurityInterceptor.java:118）在 org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter（FilterSecurityInterceptor.java:84）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.access.ExceptionTranslationFilter.doFilter（ExceptionTranslationFilter.java:113）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.session.SessionManagementFilter.doFilter（SessionManagementFilter.java:103）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter（AnonymousAuthenticationFilter.java:113）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter（SecurityContextHolderAwareRequestFilter.java:150）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter（RequestCacheAwareFilter.java:45）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter（AbstractAuthenticationProcessingFilter.java:199）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.authentication.logout.LogoutFilter.doFilter（LogoutFilter.java:110）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal（HeaderWriterFilter.java:57）在 org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter（SecurityContextPersistenceFilter.java:87）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal（WebAsyncManagerIntegrationFilter.java:50）在 org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）在 org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:342）在 org.springframework.security.web.FilterChainProxy.doFilterInternal（FilterChainProxy.java:192）在 org.springframework.security.web.FilterChainProxy.doFilter（FilterChainProxy.java:160）在 org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate（DelegatingFilterProxy.java:343）在 org.springframework.web.filter.DelegatingFilterProxy.doFilter（DelegatingFilterProxy.java:260）在 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:243）在 org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:222）在 org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:123）在 org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）在 org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:171）在 org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:99）在 org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:408）在 org.apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1023）在 org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:589）在 org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:312）在 java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1145）在 java.util.concurrent.ThreadPoolExecutor中的$ Worker.run（ThreadPoolExecutor.java:615）在java.lang.Thread.run（Thread.java:744）

Answer 1

尝试在使用之前初始化ArrayList，这将避免null，如果它是空的，它应该没有任何改变。

当列表为null或为空时，JPA createQuery将列表作为参数传递

1 个答案: