嗨，我有这样的 hbm
<hibernate-mapping package="com.mydomain.demand" default-access="field">
<class name="DemandHistory" table="DMND_PROFL_HIST">
<id name="id" column="DMND_PROFL_HIST_ID" type="long">
<generator class="sequence">
<param name="sequence">DMND_PROFL_HIST_ID_SEQ</param>
</generator>
</id>
<version name="version" column="WRITE_COUNT" type="long" unsaved-value="null" />
................
...............
<property name="demandHistSyncId" column="DMND_PROFL_HIST_SYNC_ID" type="long" />
<many-to-one name="demandStatType" column="DMND_PROFL_STAT_TYP_ID" class="com.mydomain.types.DemandProfileStatusType"
insert="false" update="false" />
<bag name="demandHistLineItems" **fetch="select"**>
<key property-ref="demandHistSyncId" column="DMND_PROFL_HIST_SYNC_ID" />
<one-to-many class="com.mydomain.demand.DemandLineItemHistory" />
</bag>
<property name="demandId" column="DMND_PROFL_ID" type="long" />
<property name="clmRcvblId" column="CLM_RECVBL_ID" type="long" />
<property name="renterResponsible" column="RENTR_RSPBL_IND" type="boolean" />
<property name="billerNoticeSent" column="BILLER_NOTC_SNT_IND" type="boolean" />
<property name="subroPartyId" column="SUBRO_PRTY_ID" type="long" />
<property name="demandCreateAdjusterId" column="DMND_PROFL_CRTE_ADJR_ID" type="string" />
<property name="demandCreateDt" column="DMND_PROFL_CRTE_DTE" type="calendar" />
</class>
</hibernate-mapping>
它抛出
LazyInitializationException：延迟初始化角色集合失败
例外。如果我将获取更改为“加入”它可以工作，但没有获得所需的记录。不了解确切的问题。请指教
堆栈跟踪是
2013-03-15 11:40:32,878|WARN|dev|||http-8081-1|com.myapp.webservice.demand.DemandHistoryWebServiceImpl|DH_WEBSERV_FAILED
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.mydomain.demand.DemandHistory.demandHistLineItems, no session or session was closed
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)
at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372)
at org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:119)
at org.hibernate.collection.PersistentBag.isEmpty(PersistentBag.java:255)
at org.apache.commons.collections.CollectionUtils.isEmpty(CollectionUtils.java:979)
at org.apache.commons.collections.CollectionUtils.isNotEmpty(CollectionUtils.java:992)
at com.myapp.service.demand.DemandHistorySearchResults.toResultItems(DemandHistorySearchResults.java:65)
at com.myapp.service.demand.DemandHistorySearchResults.<init>(DemandHistorySearchResults.java:39)
at com.myapp.domain.demand.DemandHistoryDao.search(DemandHistoryDao.java:93)
at com.myapp.service.demand.DemandHistoryServiceImpl.searchDemandHistory(DemandHistoryServiceImpl.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319)
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.invoke(TransactionInterceptor.java:110)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at $Proxy12.searchDemandHistory(Unknown Source)
at com.myapp.webservice.demand.DemandHistoryWebServiceImpl.getDemandHistory(DemandHistoryWebServiceImpl.java:79)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.myappserver.ws.RequestHandler.invokeEndpoint(RequestHandler.java:459)
at com.myapp.server.ws.RequestHandler.service(RequestHandler.java:260)
at com.myapp.server.ws.RsiEndpointServlet.doPost(RsiEndpointServlet.java:91)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
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:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
以及 DemandHistorySearchResults 中的代码：
public class DemandHistorySearchResults
extends PageableSearchResults<DemandHistorySearchResultItem> {
public DemandHistorySearchResults(List<DemandHistory> profiles, PaginationDetail pageDetail) {
// set pagedetails
setPaginationDetail(pageDetail);
List<DemandHistorySearchResultItem> items = toResultItems(profiles);
setPagableData(items);
setSearchPerformed(true);
}
private List<DemandHistorySearchResultItem> toResultItems(List<DemandHistory> profiles) {
List<DemandHistorySearchResultItem> items = CollectionFactory.newArrayList();
if (CollectionUtils.isEmpty(profiles)) {
return items;
}
for (int i = 0; i < profiles.size(); i++) {
DemandHistory profile = profiles.get(i);
DemandHistorySearchResultItem item = new DemandHistorySearchResultItem();
item.setDemandHistId(profile.getId());
item.setDemandId(profile.getDemandId());
item.setDemandCreateAdjusterId(profile.getDemandCreateAdjusterId());
item.setDemandCreateDt(profile.getDemandCreateDt());
if (profile.getDemandStatType() != null) {
item.setDemandStatTypeDesc(profile.getDemandStatType().getDescription());
}
***List<DemandLineItemHistory> lineItems = profile.getDemandHistLineItems();***
if (CollectionUtils.isNotEmpty(lineItems)) {
List<DemandLineHistoryResultItem> resultItems = CollectionFactory.newArrayList();
for (DemandLineItemHistory lineItem : lineItems) {
DemandLineHistoryResultItem resultItem = new DemandLineHistoryResultItem();
CostType costType = lineItem.getCostType();
if (costType != null) {
resultItem.setCostTypeId(costType.getId());
resultItem.setCostTypeCode(costType.getCode());
// Rule - If cost type is Misc Charge then cost description would be Line Item Misc Charge Descriprion
if (costType.isMiscCharge()) {
resultItem.setCostTypeDesc(lineItem.getMiscChargDsc());
}
else {
resultItem.setCostTypeDesc(costType.getDescription());
}
}
resultItem.setLineItemAmt(lineItem.getLineItemAmt());
resultItem.setLineItemAmtDelta(lineItem.getLineItemAmtDelta());
resultItems.add(resultItem);
}
item.setDemandHistLineItems(resultItems);
}
item.setBillerNoticeSent(profile.getBillerNoticeSent());
item.setClmRcvblId(profile.getClmRcvblId());
item.setRenterResponsible(profile.getRenterResponsible());
item.setSubroPartyId(profile.getSubroPartyId());
item.setRowNumber(i + getPaginationDetail().getRecordStart());
item.setTotalCount(getPaginationDetail().getTotalRecords());
items.add(item);
}
return items;
}