SSH+JQuery Ajax数据延迟加载的问题

Question

错误如下：org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.gboooo.entity.db.Livesource.realtimematchstatistics, no session or session was closed
org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:243)
org.apache.struts2.json.JSONWriter.process(JSONWriter.java:165)
org.apache.struts2.json.JSONWriter.value(JSONWriter.java:131)
org.apache.struts2.json.JSONWriter.write(JSONWriter.java:99)
org.apache.struts2.json.JSONUtil.serialize(JSONUtil.java:112)
org.apache.struts2.json.JSONResult.execute(JSONResult.java:198)
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:362)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:266)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237).....
说明： jquer访问struts2的action后在火狐的浏览器得到如上错误.
action代码如下：
public String execute() {
livesourceList=livesourceObserver.getLivesourceNewAllList();
return SUCCESS;
}
也就是返回一个List.   list由hibernate加载而来。
我也知道是延迟加载的相关错误。在Web.xml中加入了
<!-- 解决延迟加载的问题 -->
<filter>
<filter-name>hibernateFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
问题还没有解决。只好去查看xxx.hbn.xml文件，如下：
<class name="com.gboooo.entity.db.Livesource" table="LIVESOURCE" schema="XUNHAI" lazy="false">
        <id name="livesourceid" type="java.lang.Integer" column="LIVESOURCEID">
         <generator class="sequence" >
             <param name="sequence">AUTOADD_LIVESOURCE</param>
            </generator>
        </id>
        <many-to-one name="teamByGuestteamid" class="com.gboooo.entity.db.Team" fetch="select" >
            <column name="GUESTTEAMID" precision="22" scale="0" />
        </many-to-one>
        <many-to-one name="teamByHometeamid" class="com.gboooo.entity.db.Team" fetch="select">
            <column name="HOMETEAMID" precision="22" scale="0" />
        </many-to-one>
        <many-to-one name="schedule" class="com.gboooo.entity.db.Schedule" fetch="select">
            <column name="SCHEDULEID" precision="22" scale="0" />
        </many-to-one>
        <property name="hometeamsource" type="java.lang.Integer">
            <column name="HOMETEAMSOURCE" precision="22" scale="0" />
        </property>
        <property name="guestteamsource" type="java.lang.Integer">
            <column name="GUESTTEAMSOURCE" precision="22" scale="0" />
        </property>......不知道咋办了 
求专业人士给解药！

Answer 1

貌似是session关闭了，还是不存在，可能是编码写法上有问题吧？你试下，你试把lazy="false" 改为lazy="true"不延迟加载，看看 

Answer 2

是懒加载的问题.  
  
   去取数据时候. session已经关了.

Answer 3

楼上两位，我也知道是懒加载的问题。我也知道是延迟加载的问题。我也知道是session关闭的问题。
怎么解决！！！

Answer 4

  在web.xml中加上下面的配置
<!-- 配置解决Hibernate延迟初始化的Filter -->
<filter>
<filter-name>openSession</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>openSession</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

Answer 5

这个代码我加上去了还是没用
<!-- 解决延迟加载的问题 -->
<filter>
<filter-name>hibernateFilter</filter-name>
<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>hibernateFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
出现的错误还是：
org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.gboooo.entity.db.Livesource.realtimematchstatistics, no session or session was closed

Answer 6

我也遇到这个问题了，他们上面说的都是错的，问题都没看懂！我汗··这个应该是将某对象或集合转换成json时，因为对象或集合里面涉及到有些数据是延迟加载的问题，所以无法正确的转换，是这样才报的错，我晕·我现在也在找解决方法，网上说jsonplugin这种方法可以，但是我我试了，总不正确！目前正在解决中！如果你还没解决，或已解决，可以联系我，没解决，我们一起，解决了，你教哈我

Answer 7

找到方法了，把要转换成json的对象里面，如果有延迟加载的属性，把它设成NULL，就可以了，不用延迟加载去获取值，如果需要的话，直接去数据库查！这只是目前的解决方法

Answer 8

该过滤器一定要加在struts过滤器的上边才可以