2013-05-27 70 views
2

我正在用Spring roo管理一個項目,並且我在使用hibernate,當我嘗試使用這個控制器方法時,我有這個異常消息:無法初始化代理 - 沒有會話Spring roo無法初始化代理 - 沒有會話

org.hibernate.collection.internal.AbstractPersistentCollection.withTemporarySessionIfNeeded(AbstractPersistentCollection.java:186) 
org.hibernate.collection.internal.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:545) 
org.hibernate.collection.internal.AbstractPersistentCollection.read(AbstractPersistentCollection.java:124) 
org.hibernate.collection.internal.PersistentSet.iterator(PersistentSet.java:180) 
com.macrosystem.rentacar.service.DefaultJournalService.getReservationsProfitPerYear(DefaultJournalService.java:142) 
com.macrosystem.rentacar.service.DefaultJournalService.getTotalLossAndProfitPerYear(DefaultJournalService.java:159) 
com.macrosystem.rentacar.service.DefaultJournalService.getTotalLossAndProfit(DefaultJournalService.java:173) 
com.macrosystem.rentacar.web.JournalController.lossAndPorfit(JournalController.java:44) 

這裏是控制器方法:

@RequestMapping("/lossandprofit.json") 
public @ResponseBody List<Map<String, Number>> lossAndPorfit(){ 
    return journalService.getTotalLossAndProfit() ; 
} 

和服務方法使所述異常

@Override 
@Transactional 
public BigDecimal getReservationsProfitPerYear(int year) { 
    BigDecimal reservationsprofit = new BigDecimal(0) ; 
    if(vehicle == null){ 
     log.warn("vehicule is null") ; 
    } 
    Set<Reservation> reservations = vehicle.getReservations() ; 
    Iterator<Reservation> iterator = reservations.iterator() ; 
    while(iterator.hasNext()){ 
     Reservation current = iterator.next() ; 
     GregorianCalendar calendar = new GregorianCalendar() ; 
     calendar.setTime(current.getStartDate()) ; 
     if (calendar.get(Calendar.YEAR) == year){ 
      reservationsprofit = reservationsprofit.add(current.getAmount()) ; 
     } 
    } 
    return reservationsprofit; 
} 

爲什麼我有一個例外,即使我與標註我@Transactionnal服務方法,我看着applicationContext.xml文件,發現這條線

<tx:annotation-driven mode="aspectj" 
    transaction-manager="transactionManager" /> 

難道是取消該效果模式=「切面」部分那個註釋?

回答

1

得到了同樣的錯誤,並閱讀本stackoverflow response後,我增加了以下我的web.xml這解決了這個問題:

<filter> 
    <filter-name>jpaOpenEntityManagerInViewFilter</filter-name> 
    <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class> 
</filter> 

<filter-mapping> 
    <filter-name>jpaOpenEntityManagerInViewFilter</filter-name> 
    <url-pattern>/*</url-pattern> 
    <dispatcher>REQUEST</dispatcher> 
    <dispatcher>FORWARD</dispatcher> 
</filter-mapping> 
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