今天在写jbpm获取流程变量的时候出现了这个异常:org.hibernate.LazyInitializationException: could not initialize proxy - no Session 原因就是jbpm的底层采用了懒加载的方式,解决这个异常的方法就是在对象的映射文件中去掉默认的懒加载,例如: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class name="cn.itcast.jbpm.processVariable.Form" table="itcast_form" lazy="false"> <id name="id" type="long"> <column name="id"></column> <generator class="increment"></generator> </id> <property name="title" type="string"> <column name="title"></column> </property> </class> </hibernate-mapping> 方法一:lazy默认是true,改成false就不会出现该异常了。
方法二:就是把这个类改成final类型的,这样它就不会产生代理对象了,如下: package cn.itcast.jbpm.processVariable; public final class Form { private Long id; private String title; public Form(){ } public Form(Long id, String title) { this.id = id; this.title = title; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } }