SSH调试的时候出现 no session 搞了半天也没有调试通过

Question

在调试ssh项目的时候总是报错严重: Servlet.service() for servlet action threw exception
org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:57)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:150)
at com.csms.bean.CustomerQuestion$$EnhancerByCGLIB$$cb37539d.getCreateEmployee(<generated>)
at com.csms.dao.CustomerQuestionDAO.findCreateEmployee(CustomerQuestionDAO.java:62)
at com.csms.service.impl.CustomerQuestionService.findEmployee(CustomerQuestionService.java:34)
at com.csms.action.CustomerServiceAction.goTransQuestion(CustomerServiceAction.java:113)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at com.csms.processor.EncodingProcessor.process(EncodingProcessor.java:17)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source) 
网上说的解决方法是在 hbm文件中的 set 处添加lazy="false"
可是修改过以后还是出现这样的错误 试了好多的方法都不行 
麻烦高手指点一下 小弟谢过 O(∩_∩)O~

Answer 1

不是设置lazy="false"就能解决的，是你的session关闭了，你要保证session是打开的才行，这和你的具体开发环境有关系。说的详细一点吧。

Answer 2

我把代码贴一下好了
CustomerQuestion.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping 3.0 DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" ><hibernate-mapping package="com.csms.bean">
<class
name="CustomerQuestion"
table="customer_question"
>

<meta attribute="sync-DAO">true</meta> <id
name="id"
type="integer"
column="id"
>
<generator class="increment"/>
</id> <property
name="type"
column="type"
type="integer"
not-null="true"
length="2"
/>
<property
name="createDate"
column="createDate"
type="date"
not-null="true"
length="10"
/>
<property
name="resolveDate"
column="resolveDate"
type="date"
not-null="false"
length="10"
/>
<property
name="resolveMethods"
column="resolveMethods"
type="string"
not-null="false"
/>


<property
name="resolveState"
column="resolveState"
type="integer"
not-null="true"
length="1"
/>
<property
name="resultState"
column="resultState"
type="integer"
not-null="true"
length="1"
/>
<property
name="title"
column="title"
type="string"
not-null="true"
length="50"
/>
<property
name="description"
column="description"
not-null="false"
/>
<property
name="customerName"
column="customerName"
type="string"
not-null="false"
length="20"
/>
<property
name="customerContact"
column="customerContact"
type="string"
not-null="false"
length="50"
/>

<many-to-one
             name="createEmployee"
             column="createEmployee"
             class="Employee"
             cascade="save-update"
             lazy="false" 
        >
        </many-to-one>
<many-to-one
             name="transFromEmployee"
             column="transFromEmployee"
             class="Employee"
             cascade="save-update"
             fetch="select"
        >
        </many-to-one>
        <many-to-one
             name="transToEmployee"
             column="transToEmployee"
             class="Employee"
             cascade="save-update"
            fetch="select"
        >
        </many-to-one>
        
</class>
</hibernate-mapping>Employee.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping 3.0 DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" ><hibernate-mapping package="com.csms.bean">
<class
name="Employee"
table="employee"
> <meta attribute="sync-DAO">true</meta> <id
name="id"
type="integer"
column="id"
>
<generator class="increment"/>
</id> <property
name="workId"
column="workId"
type="string"
not-null="true"
length="11"
/>
<property
name="name"
column="name"
type="string"
not-null="true"
length="10"
/>
<property
name="department"
column="department"
type="string"
not-null="false"
length="20"
/>
<property
name="type"
column="type"
type="integer"
not-null="true"
length="2"
/>
        <set 
            name="customerQuestions"
            inverse="true"
            cascade="all"
            outer-join="true"
            lazy="false"
        >
            <key column="transToEmployee"/>
            <one-to-many class="CustomerQuestion" />
        </set>
</class>
</hibernate-mapping>
Action文件
 public ActionForward goTransQuestion(ActionMapping mapping,
            ActionForm form, HttpServletRequest request,
            HttpServletResponse response)  {
        //从表单中获得问题ID
        DynaActionForm dform = (DynaActionForm)form;
        Integer questionId = Integer.valueOf(request.getParameter("id"));
       
        //根据问题ID获得问题对象
        CustomerQuestion question = questionService.findQuestionById(questionId);
        question.getTitle();
        
        //初始化问题的解决状态和关闭状态
        dform.set("resolveState",String.valueOf(question.getResolveState()));
        dform.set("resultState",String.valueOf(question.getResultState()));
       
        //获得所有参与客服管理的人员列表
        List employeeList = new ArrayList();
        employeeList = employeeService.findAllEmployee();
        
        //获得建立问题人员对象   调用此处的时候开始出错的
        String createEmployee = questionService.findEmployee(questionId,0).getName();
        
        //获得传来问题的人员对象
        String transFromEmployee = questionService.findEmployee(questionId,1).getName();
        
        //获得最后解决问题的人员对象
        String transToEmployee = questionService.findEmployee(questionId,2).getName();
        
        //将上述对象存入Request对象中，传递给页面
        request.setAttribute("questionId",questionId);
        request.setAttribute("question",question);
        request.setAttribute("employeeList",employeeList);
        request.setAttribute("createEmployee",createEmployee);
        request.setAttribute("transFromEmployee",transFromEmployee);
        request.setAttribute("transToEmployee",transToEmployee);
        
        //跳转到客服人员转发问题页面
        return mapping.findForward("GoTransQuestion");
    } CustomerQuestionService.java
package com.csms.service.impl;import java.util.List;import com.csms.bean.CustomerQuestion;
import com.csms.bean.Employee;
import com.csms.dao.iface.ICustomerQuestionDAO;
import com.csms.service.iface.ICustomerQuestionService;public class CustomerQuestionService implements ICustomerQuestionService { private ICustomerQuestionDAO customerQuestionDAO ;

public void setCustomerQuestionDAO(ICustomerQuestionDAO customerQuestionDAO) {
this.customerQuestionDAO = customerQuestionDAO;
} public void closeQuestion(Integer questionId) {
// TODO Auto-generated method stub
customerQuestionDAO.closeQuestion(questionId);
} public void deleteQeustion(CustomerQuestion question) {
// TODO Auto-generated method stub

} public List<CustomerQuestion> findAllUnResolvedQuestions() {

return customerQuestionDAO.findAllUnResolvedQuestions();
} public Employee findEmployee(Integer questionId, Integer employeeType) {
  if(employeeType==0) return customerQuestionDAO.findCreateEmployee(questionId);
        if(employeeType==1) return customerQuestionDAO.findTransFromEmployee(questionId);
        if(employeeType==2) return customerQuestionDAO.findTransToEmployee(questionId);
        return null;
}
public CustomerQuestion findQuestionById(Integer questionId) {
return customerQuestionDAO.findQuestionById(questionId);
} public void saveQuestion(CustomerQuestion question) {
customerQuestionDAO.saveQuestion(question);
} public void updateQuestion(CustomerQuestion question) {
// TODO Auto-generated method stub

}}
CustomerQuestionDAO.java
package com.csms.dao;import java.util.ArrayList;
import java.util.List;import org.springframework.orm.hibernate3.support.HibernateDaoSupport;import com.csms.bean.CustomerQuestion;
import com.csms.bean.Employee;
import com.csms.dao.iface.ICustomerQuestionDAO;public class CustomerQuestionDAO extends HibernateDaoSupport implements ICustomerQuestionDAO { public void closeQuestion(Integer questionId) 
{
  CustomerQuestion question = (CustomerQuestion) this.getHibernateTemplate().get(CustomerQuestion.class, questionId);
        //关闭问题需要把问题的关闭状态设为1
        question.setResultState(1);
        getHibernateTemplate().saveOrUpdate(question);
} public void deleteQuestion(CustomerQuestion question) {
// TODO Auto-generated method stub

} public List<CustomerQuestion> findAllUnResolvedQuestions() {

String hql="from CustomerQuestion";
List list = new ArrayList();
list=this.getHibernateTemplate().find(hql);
return list;
} public Employee findEmployee(Integer questionId, Integer employeeType) { CustomerQuestion question = (CustomerQuestion) this.getHibernateTemplate().get(CustomerQuestion.class, questionId);
System.out.println(question.getCreateEmployee());
//Employee employee=(Employee) this.getHibernateTemplate().get(CustomerQuestion.class, questionId);
return null;
} public CustomerQuestion findQuestionById(Integer id) { CustomerQuestion customerQuestion=(CustomerQuestion) this.getHibernateTemplate().get(CustomerQuestion.class, id);
return customerQuestion;
} public void saveQuestion(CustomerQuestion question) {
this.getHibernateTemplate().save(question);
} public void updateQuestion(CustomerQuestion question) {
// TODO Auto-generated method stub

}
    public Employee findCreateEmployee(Integer questionId) {
        CustomerQuestion question = (CustomerQuestion) this.getHibernateTemplate().load(CustomerQuestion.class,questionId);
        
        Employee employee = new Employee();
        employee=question.getCreateEmployee();
        return employee;
    }    public Employee findTransFromEmployee(Integer questionId) {
        CustomerQuestion question =(CustomerQuestion) this.getHibernateTemplate().load(CustomerQuestion.class,questionId);
        Employee employee = new Employee();
        employee = question.getTransFromEmployee();
        return employee;
    }    public Employee findTransToEmployee(Integer questionId) {
        CustomerQuestion question = (CustomerQuestion) this.getHibernateTemplate().load(CustomerQuestion.class,questionId);
        Employee employee = new Employee();
        employee = question.getTransToEmployee();
        return employee;
    }这三个函数只要执行就会报错的 
}
麻烦高手看一下 谢谢了

Answer 3

看一下applicationContext.xml文件的配置

Answer 4

applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> <bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="com.mysql.jdbc.Driver">
</property>
<property name="url" value="jdbc:mysql://localhost:3306/csms?useUnicode=true&amp;characterEncoding=UTF-8"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="mappingResources">  
                 <list>  
                       <value>com/csms/hbm/Employee.hbm.xml</value>  
                       <value>com/csms/hbm/CustomerQuestion.hbm.xml</value>  
                 </list>  
           </property>  

</bean>

<!-- 定义员工持久化类 --> 
    <bean id="employee" class="com.csms.bean.Employee" lazy-init="default" autowire="default" dependency-check="default" /> 
<!-- 定义客户持久化类--> 
    <bean id="customerQuestion" class="com.csms.bean.CustomerQuestion" lazy-init="default" autowire="default" dependency-check="default" /> 

 <!-- 定义员工DAO--> 
<bean id="employeeDAO" class="com.csms.dao.EmployeeDAO" lazy-init="default" autowire="default" dependency-check="default">
<property name="sessionFactory">
<ref local="sessionFactory" /> 
   </property>
   </bean>
<!-- 定义客户问题DAO--> 
<bean id="questiondao" class="com.csms.dao.CustomerQuestionDAO" lazy-init="default" autowire="default" dependency-check="default">
<property name="sessionFactory">
   <ref local="sessionFactory" /> 
  </property>
   </bean>
<bean id="customerQuestionDAO" class="com.csms.dao.CustomerQuestionDAO" lazy-init="default" autowire="default" dependency-check="default">
<property name="sessionFactory">
   <ref local="sessionFactory" /> 
  </property>
   </bean>
<bean id="employeeService" class="com.csms.service.impl.EmployeeService" lazy-init="default" autowire="default" dependency-check="default">
<property name="employeeDAO">
<ref bean="employeeDAO"/>
</property>
   </bean>
<bean id="customerQuestionService" class="com.csms.service.impl.CustomerQuestionService" lazy-init="default" autowire="default" dependency-check="default">
<property name="customerQuestionDAO">
<ref bean="customerQuestionDAO"/>
</property>
   </bean>
<bean name="/employeeLogin" class="com.csms.action.EmployeeLoginAction"  lazy-init="default" autowire="default" dependency-check="default">
<property name="employeeService">
<ref bean="employeeService"/>
</property>
    </bean>
  <bean name="/customerService" class="com.csms.action.CustomerServiceAction"  lazy-init="default" autowire="default" dependency-check="default">
<property name="employeeService">
<ref bean="employeeService"/>
</property>
<property name="questionService">
<ref bean="customerQuestionService"/>
</property>
</bean>
 <bean name="/createQuestion" class="com.csms.action.CustomerServiceAction"  lazy-init="default" autowire="default" dependency-check="default">
<property name="employeeService">
<ref bean="employeeService"/>
</property>
<property name="questionService">
<ref bean="customerQuestionService"/>
</property>
 </bean>
  <bean name="/techSupport" class="com.csms.action.TechSupportAction"  lazy-init="default" autowire="default" dependency-check="default">
<property name="employeeService">
<ref bean="employeeService"/>
</property>
<property name="questionService">
<ref bean="customerQuestionService"/>
</property>
    </bean>
     <bean name="/managerOperate" class="com.csms.action.ManagerOperateAction"  lazy-init="default" autowire="default" dependency-check="default">
<property name="employeeService">
<ref bean="employeeService"/>
</property>
<property name="questionService">
<ref bean="customerQuestionService"/>
</property>
   </bean>
   
 
   
<bean name="/GoTechSupportView" class="com.csms.action.EmployeeLoginAction"  lazy-init="default" autowire="default" dependency-check="default">
<property name="employeeService">
<ref bean="employeeService"/>
</property>
   </bean>
</beans>
麻烦高手......

Answer 5

是不是因为load()方法的缘故，如果表中不存在对应id的记录，使用load方法会报错，而使用get方法返回的是null

Answer 6

我是根据当前页面传递过来的数据id 来进行get的 id的值我测试过了 是有参数的 
  郁闷 测试了半天还没有调试通 

Answer 7

今天刚好学了这个问题！！ 完美的解决方法就是些个触发器  在里面获得Session和关闭Session。
*.do的请求就进入触发器。
或者lazy="false"也能解决这个问题

Answer 8

使用 org.springframework.orm.hibernate3.support.OpenSessionInViewFilter    或者
 org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor
保持session打开，如果使用OpenSessionInViewFilter   向如下这样filter>    
  <filter-name>OpenSessionInViewFilterfilter-name>   
  <filter-class>   
    org.springframework.orm.hibernate3.support.OpenSessionInViewFilter    
  filter-class>   
  <init-param>   
    <description>   
       默认情况下，这个Filter会在Spring的bean池中找一个叫做sessionFactory的bean。如果使用了其他名字的SessionFactory，则应该在这里    
       指定这个名字。    
    description>   
    <param-name>sessionFactoryBeanName<param-name>   
    <param-value>localSessionFactory<param-value>   
  init-param>   
 
filter>   
<filter-mapping>   
  <filter-name>OpenSessionInViewFilterfilter-name>   
  <url-pattern>/*<url-pattern>   
filter-mapping>   如果使用openSessionInViewInterceptor
<bean id="openSessionInViewInterceptor" class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">   
  <property name="sessionFactory" ref="localSessionFactory" />   
</bean>   
就需要使用aop

Answer 9

spring 有一个配置是关于这个的，可以保持session不关闭，原因在于spring和hibernate的事物有冲突，spring和hibernate都认为各自有一个session，所以spring 会把hiberante的session给关闭了，导致出错，在web.xml中添加一个spring的过滤器，保持 session打开，就行了

Answer 10

你的实体类CustomerQuestion中的外键对象createEmployee要new一下。

Answer 11

已经解决了 谢谢呵呵 我采用了事务管理
 
<bean id="employeeService" class="com.csms.service.impl.EmployeeService" lazy-init="default" autowire="default" dependency-check="default">
 <property name="employeeDAO">
  <ref local="employeeDAO" /> 
  </property>
  </bean>
 <!-- 定义客户问题相关业务逻辑
  --> 
 <bean id="customerQuestionService" class="com.csms.service.impl.CustomerQuestionService" lazy-init="default" autowire="default" dependency-check="default">
 <property name="customerQuestionDAO">
  <ref local="customerQuestionDAO" /> 
  </property>
  </bean>
 <!-- 定义Hibernate事务管理器
  --> 
 <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" lazy-init="default" autowire="default" dependency-check="default">
 <property name="sessionFactory">
  <ref bean="sessionFactory" /> 
  </property>
  </bean>

<bean id="employeeServiceProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="default" autowire="default" dependency-check="default">
  <property name="transactionManager">
   <ref bean="transactionManager" /> 
   </property>
  <property name="target">
   <ref local="employeeService" /> 
   </property>
 <property name="transactionAttributes">
  <props>
  <prop key="employeeLogin">PROPAGATION_REQUIRED,readOnly</prop> 
   <prop key="find*">PROPAGATION_REQUIRED,readOnly</prop> 
   </props>
   </property>
  </bean>然后要设置<many-to-one 的lazy="false"
设置 <Set 的 lazy="true"
否则回报如下错误的
javax.servlet.ServletException: org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:523)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
com.csms.processor.EncodingProcessor.process(EncodingProcessor.java:17)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)谢谢帮忙 结贴