hibernate - 具有 session 范围的bean的LazyInitializationException

我在服务层中收到带有会话范围的bean的LazyInitializationException。如果在我的方法中使用常规dao加载相同的bean，则可以毫无问题地访问它的惰性集合。但是，如果我将其注入到服务bean中，然后尝试访问其惰性集合之一，则将出现LazyInitializationException。

我正在使用JPA + Hibernate + Spring + struts。我已经配置了OpenEntityManagerInViewFilter。此外，我可以在日志中清楚地看到事务和会话已打开。

在具有延迟集合的会话范围的Bean的配置中，我必须做些特别的事情吗？

以下是日志：

    org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter:lookupEntityManagerFactory:146 - Using EntityManagerFactory 'entityManagerFactory' for OpenEntityManagerInViewFilter
    org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter:doFilterInternal:101 - Opening JPA EntityManager in OpenEntityManagerInViewFilter
    org.springframework.orm.jpa.JpaTransactionManager:doGetTransaction:285 - Found thread-bound EntityManager [org.hibernate.ejb.EntityManagerImpl@17ab5c0] for JPA transaction
    org.springframework.transaction.support.AbstractPlatformTransactionManager:getTransaction:371 - Creating new transaction with name [com.xx.action.spring.service.SearchService.loadCurrencyCode]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly
    org.hibernate.impl.SessionImpl:<init>:247 - opened session at timestamp: 5093202578464768
    org.hibernate.transaction.JDBCTransaction:begin:82 - begin
    org.hibernate.jdbc.ConnectionManager:openConnection:444 - opening JDBC connection
    org.hibernate.transaction.JDBCTransaction:begin:87 - current autocommit status: true
    org.hibernate.transaction.JDBCTransaction:begin:90 - disabling autocommit
    org.springframework.orm.jpa.JpaTransactionManager:doBegin:348 - Exposing JPA transaction as JDBC transaction [SimpleConnectionHandle: com.mchange.v2.c3p0.impl.NewProxyConnection@9b537f]
    org.hibernate.LazyInitializationException:<init>:42 - could not initialize proxy - no Session
    org.hibernate.LazyInitializationException: could not initialize proxy - no Session
        at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:86)
        at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:140)
        at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:190)
        at com.xxx.api.jpa.bean.CurrencyBean_$$_javassist_29.getHtmlSymbol(CurrencyBean_$$_javassist_29.java)

这是bean的配置：

<bean id="currentUserBean" class="com.xxx.action.spring.CurrentUserBean" scope="session">
        <aop:scoped-proxy />
</bean>

最佳答案

看看这个线程：

Spring Forum Discussion

好吧，再试试这个-真的是一样的答案

Better Spring Forum Discussion

似乎最简单的解决方案是在休眠映射文件中设置lazy =“ false”，但是那里有一个完整的答案，它将允许您使用LazyInitialization

关于hibernate - 具有 session 范围的bean的LazyInitializationException，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/918196/