hibernate 懒加载问题的一个临时解决方案

hibernate的懒加载问题时常会困扰着我们， 今天发现了hibernate自身也提供一些解决办法

Hibernate.initialize(company.getUsers());  这样就加载了users集合

但不支持递归加载

it is not guaranteed that the elements INSIDE the collection will be initialized/materialized

假如这时session关闭了  会报错

 

 

真正解决懒加载还是应该在类的设计 xml文件的配置上下功夫

 

源码：

/**
 * Force initialization of a proxy or persistent collection.
 * <p/>
 * Note: This only ensures intialization of a proxy object or collection;
 * it is not guaranteed that the elements INSIDE the collection will be initialized/materialized.
 *
 * @param proxy a persistable object, proxy, persistent collection or <tt>null</tt>
 * @throws HibernateException if we can't initialize the proxy at this time, eg. the <tt>Session</tt> was closed
 */
public
 
static
 
void
 initialize(Object proxy) 
throws
 HibernateException {
    if
 ( proxy == 
null
 ) {
        return
;
    }
    else
 
if
 ( proxy 
instanceof
 HibernateProxy ) {
        ( ( HibernateProxy ) proxy ).getHibernateLazyInitializer().initialize();
    }
    else
 
if
 ( proxy 
instanceof
 PersistentCollection ) {
        ( ( PersistentCollection ) proxy ).forceInitialization();
    }
}

/**
 * Check if the proxy or persistent collection is initialized.
 *
 * @param proxy a persistable object, proxy, persistent collection or <tt>null</tt>
 * @return true if the argument is already initialized, or is not a proxy or collection
 */
public
 
static
 
boolean
 isInitialized(Object proxy) {
    if
 ( proxy 
instanceof
 HibernateProxy ) {
        return
 !( ( HibernateProxy ) proxy ).getHibernateLazyInitializer().isUninitialized();
    }
    else
 
if
 ( proxy 
instanceof
 PersistentCollection ) {
        return
 ( ( PersistentCollection ) proxy ).wasInitialized();
    }
    else
 {
        return
 
true
;
    }
}