当我尝试调用服务从远程数据库获取数据时出现此错误
控制台日志：
14:02:52,651 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/gasnaturalfenosa].[appServlet]] (http-localhost-127.0.0.1-8080-4) Servlet.service() para servlet appServlet lanzó excepción: java.lang.NullPointerException
at com.gas.servicioImpl.ServicioEncuestaImpl.getEncuesta(ServicioEncuestaImpl.java:32) [classes:]
at com.gas.rest.EncuestaController.getPueblos(EncuestaController.java:29) [classes:]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_79]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_79]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_79]
at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_79]
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215) [spring-web-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) [spring-web-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:919) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:851) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:734) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829) [spring-webmvc-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.0.Final.jar:1.0.0.Final]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:230) [spring-orm-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106) [spring-web-3.2.13.RELEASE.jar:3.2.13.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161) [jbossweb-7.0.13.Final.jar:]
at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) [jbossweb-7.0.13.Final.jar:]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877) [jbossweb-7.0.13.Final.jar:]
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671) [jbossweb-7.0.13.Final.jar:]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]
at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_79]
14:02:56,948 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) org.hibernate.QueryException: * only allowed inside aggregate function in SELECT [SELECT * FROM com.gas.modelo.Delegacion d ORDER BY d.delegacion ASC]
14:02:56,949 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.hql.classic.SelectParser.token(SelectParser.java:146)
14:02:56,949 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.hql.classic.ClauseParser.token(ClauseParser.java:109)
14:02:56,949 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.hql.classic.ClauseParser.end(ClauseParser.java:136)
14:02:56,950 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.hql.classic.PreprocessingParser.end(PreprocessingParser.java:145)
14:02:56,950 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.hql.classic.ParserHelper.parse(ParserHelper.java:52)
14:02:56,950 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.hql.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:240)
14:02:56,951 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.hql.classic.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:209)
14:02:56,951 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
14:02:56,952 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
14:02:56,952 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:124)
14:02:56,952 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
14:02:56,953 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
14:02:56,953 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1770)
14:02:56,953 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.gas.daoImpl.DelegacionDaoImpl.getDelegaciones(DelegacionDaoImpl.java:29)
14:02:56,954 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.gas.servicioImpl.ServicioDelegacionImpl.getDelegaciones(ServicioDelegacionImpl.java:30)
14:02:56,954 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at com.gas.rest.DelegacionController.getDelegaciones(DelegacionController.java:30)
14:02:56,954 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
14:02:56,955 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
14:02:56,955 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
14:02:56,955 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.reflect.Method.invoke(Method.java:606)
14:02:56,956 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
14:02:56,956 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
14:02:56,957 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
14:02:56,957 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743)
14:02:56,958 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672)
14:02:56,958 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82)
14:02:56,959 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:919)
14:02:56,959 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:851)
14:02:56,959 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
14:02:56,960 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)
14:02:56,960 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
14:02:56,961 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
14:02:56,961 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
14:02:56,962 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)
14:02:56,962 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
14:02:56,962 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:230)
14:02:56,963 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)
14:02:56,963 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
14:02:56,964 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
14:02:56,964 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
14:02:56,965 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
14:02:56,965 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153)
14:02:56,966 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155)
14:02:56,966 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
14:02:56,967 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
14:02:56,967 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368)
14:02:56,967 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
14:02:56,968 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671)
14:02:56,968 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930)
14:02:56,968 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) at java.lang.Thread.run(Thread.java:745)
以下是我查询的方式：
@Repository
public class DelegacionDaoImpl implements DelegacionDao {
@Autowired
@Qualifier("sfGas")
SessionFactory sf;
Session session;
@SuppressWarnings("unchecked")
public List<Delegacion> getDelegaciones(){
try{
Session session = sf.getCurrentSession();
Query q = session.createQuery("SELECT * FROM Delegacion d ORDER BY d.delegacion ASC");
return (List<Delegacion>) q.list();
}catch(Exception e){
e.printStackTrace();
return null;
}
}
}
道：
@Entity
@Table(name="catDelegacion")
public class Delegacion implements Serializable{
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="id_delegacion")
private Integer id_delegacion;
@Column(name="delegacion")
private String delegacion;
public Integer getId_delegacion() {
return id_delegacion;
}
public void setId_delegacion(Integer id_delegacion) {
this.id_delegacion = id_delegacion;
}
public static long getSerialversionuid() {
return serialVersionUID;
}
public String getDelegacion() {
return delegacion;
}
public void setDelegacion(String delegacion) {
this.delegacion = delegacion;
}
}
为什么我收到此错误？我做错了什么？在我的春季项目中，其他一切都很好。
修改 现在我收到了这个错误
15:30:41,835 WARN [org.hibernate.util.JDBCExceptionReporter] (http-localhost-127.0.0.1-8080-4) SQL Error: 0, SQLState: 42P01
15:30:41,836 ERROR [org.hibernate.util.JDBCExceptionReporter] (http-localhost-127.0.0.1-8080-4) ERROR: relation "catdelegacion" does not exist
Position: 91
15:30:41,836 ERROR [stderr] (http-localhost-127.0.0.1-8080-4) org.hibernate.exception.SQLGrammarException: could not execute query
没有catdelegacion，但 catDelegacion
答案 0 :(得分：3)
这是Hibernate，查询语言是HQL，它与SQL类似但不完全相同。如果您想要返回完整的Delegacion个对象，请说明
FROM Delegacion d ORDER BY d.delegacion ASC
即。没有select *。
有关HQL的更多信息，请查看https://docs.jboss.org/hibernate/orm/3.3/reference/en/html/queryhql.html#queryhql-from