解決org.hibernate.LazyInitializationException: could not initialize proxy - no Ses
來源：程序員人生 發布時間：2014-11-11 08:57:20 閱讀次數：6181次
問題描寫：
Struts Problem Report
Struts has detected an unhandled exception:
| Messages: |
- could not initialize proxy - no Session
- Error reading 'name' on type future.oa.domain.Department_$$_jvstb8a_0
- javax.el.ELException: Error reading 'name' on type future.oa.domain.Department_$$_jvstb8a_0
|
| File: |
org/hibernate/proxy/AbstractLazyInitializer.java |
Stacktraces
org.apache.jasper.JasperException: javax.el.ELException: Error reading 'name' on type future.oa.domain.Department_$$_jvstb8a_0
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
.......
javax.el.ELException: Error reading 'name' on type future.oa.domain.Department_$$_jvstb8a_0
javax.el.BeanELResolver.getValue(BeanELResolver.java:110)
org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:104)
org.apache.el.parser.AstValue.getValue(AstValue.java:183)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
......
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:164)
org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:285)
org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185)
future.oa.domain.Department_$$_jvstb8a_0.getName(Department_$$_jvstb8a_0.java)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
......
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解決方法：
解決懶加載問題。
方法1:（直接將懶加載關閉）：
在 .hbm.xml 里
<!-- lazy="false"關閉懶加載 -->
<set name="children" cascade="delete"
lazy="false">
<key column="parentId"></key>
<one-to-many class="Department"/>
</set>
缺點：1些懶加載的優點也用不了了。
方法2:
在 web.xml里（注：要在 <!-- 配置struts2核心的過濾器 --> 之前）
<!-- 配置Spring的用于解決懶加載問題的過濾器 -->
<filter>
<filter-name>OpenSessionInViewFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>OpenSessionInViewFilter</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
然后在 *.hbm.xml里 再打開懶加載。
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