访问我声明的servlet时遇到此错误：
org.hibernate.LazyInitializationException: could not initialize proxy - no Session at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:167) at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:215) at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190) at com.confloorapp.domain.Floor_$$_javassist_0.setNumberOfEvents(Floor_$$_javassist_0.java) at com.ifloor.services.endpoint.UpdateFloorEventServlet.doGet(UpdateFloorEventServlet.java:59) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:723) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118) at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87) at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342) at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192) at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at net.stax.appserver.webapp.RequestMonitorValve.invoke(RequestMonitorValve.java:35) at net.stax.appserver.admin.StaxApplicationQueryValve.invoke(StaxApplicationQueryValve.java:49) at net.stax.appserver.webapp.RequestSetupValve.invoke(RequestSetupValve.java:31) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:652) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Unknown Source)
直接从Servlet获取服务时：
public class UpdateFloorEventServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(getServletContext());
try {
FloorService floorService = (FloorService)context.getBean("floorService");
Floor floor = (Floor) floorService.findById (floorId);
...
}
@Transactional(propagation = Propagation.SUPPORTS)
@Service("floorService")
public class FloorServiceImpl implements FloorService {
...
}
由于
我发现问题与控制器无关，当我设置属性时它与之相关：
floor.setNumberOfEvents ((Long)numOfEvents);
@Entity
@Table(name="T_FLOOR")
public class Floor {
@Id
@Column(name = "FLOOR_ID", unique = true, nullable = false)
private Integer id;
@Column(name = "FLOOR_KEY")
private String floorKey;
@Column(name = "NUMBER_OF_EVENTS")
private Long numberOfEvents;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Long getNumberOfEvents() {
return numberOfEvents;
}
public void setNumberOfEvents(Long numberOfEvents) {
this.numberOfEvents = numberOfEvents;
}
public String getFloorKey() {
return floorKey;
}
public void setFloorKey(String floorKey) {
this.floorKey = floorKey;
}
}
的MySQL
CREATE TABLE `T_FLOOR` (
`FLOOR_ID` int(11) NOT NULL AUTO_INCREMENT,
`FLOOR_KEY` varchar(45) DEFAULT NULL,
`FLOOR_DESC` varchar(45) DEFAULT NULL,
`LOCATION_ID` int(11) DEFAULT NULL,
`NUMBER_OF_EVENTS` bigint(20) DEFAULT NULL,
`LAST_EVENT` timestamp NULL DEFAULT NULL,
`LAST_UPDATE` timestamp NULL DEFAULT NULL,
`LATITUDE` float DEFAULT NULL,
`LONGITUDE` float DEFAULT NULL,
PRIMARY KEY (`FLOOR_ID`),
UNIQUE KEY `FLOOR_ID_UNIQUE` (`FLOOR_ID`),
KEY `FK_floor_location` (`LOCATION_ID`),
CONSTRAINT `FK_door_location` FOREIGN KEY (`LOCATION_ID`) REFERENCES `T_LOCATION` (`LOCATION_ID`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8