SSH的配置问题，无语了 找不到错误

Question

本帖最后由 sulei198611 于 2011-11-17 22:31:09 编辑

Answer 1

提交表单后报的错误type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception javax.servlet.ServletException: java.lang.NullPointerException
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:515)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)
root cause java.lang.NullPointerException
net.personmanager.checkUser(personmanager.java:23)
net.loginaction.execute(loginaction.java:28)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:597)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:404)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:229)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:221)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:107)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:206)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:115)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:143)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:121)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:50)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:504)
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.

Answer 2

private personmanager personManage=new personmanager();
使用spring 不需要new  一定要记住
   很明显personManage是空的
 struts2的loginaction 请求需要被spring 拦截 就是所谓的aop，spring才能控制反转ioc ，最后把bean注入di 到你的action中， 
 你看下你的spring 的配置中有对action的请求做切入点嘛
<aop:config>
<aop:pointcut id="defaultServiceOperation"
expression="execution(* com.*.bussiness.*Service.*(..))" 
/>
<aop:advisor pointcut-ref="defaultServiceOperation"
advice-ref="txAdvice" />
</aop:config>
我都是使用这中aop 
  不过也可以在bean aop 
  可也没看到你的personmanager bean 中有设置

Answer 3

你用getHibernateTemplate().execute(new HibernateCallback() {
public Object doInHibernate(Session session) throws SQLException {
session.createQuery
}
});
试试行不行。。

Answer 4

<bean id="loginaction" class="net.loginaction" abstract="false"
  lazy-init="default" autowire="default" dependency-check="default">
  <property name="personmanager">
  <ref bean="personmanager" />
  </property>
</bean>
不知道这个是不是你的aop ，我没用过这种方式
   如果确定是，那么确定action 中 personmanager 做了 set get 的方法
  同时建议personmanager 这个bean 的名字改为 personManager ，确保与action中的personManager 名字相同

Answer 5

既然用了spring就不要new了.....

Answer 6

断点跟踪了下发现不new的话 personManage是个null

Answer 7

  
  
  那么确定action 中对private personmanage personManage 做了 set get 的方法嘛？

Answer 8

做了得
 public void setPersonmanager(personmanager personManage)
{
   this.personManage=personManage;
}
  public personmanager getPersonmanager()
{
   return personManage;
}

Answer 9

你文件中有HibernateSessionFactory.java没？有的话删掉，SSH框架不需要，这个文件是eclipse在自动生成的

Answer 10

private personmanager personManage=new personmanager();
public void setPersonmanager(personmanager personManage) {
  this.personManage = personManage;
}
你的set方法名明显跟字段名不匹配，不是用工具生成的吧，如果set方法跟字段名不匹配的话会找不到的
应该改为setPersonManage

Answer 11

loginaction 文件中怎么没有get,set方法？

Answer 12

public class loginaction extends ActionSupport {private String userName;
private personmanager personManage=new personmanager();
public String getUserName() {
   return userName;
}
public void setUserName(String userName) {
   this.userName = userName;
}
 public void setPersonmanager(personmanager personManage)
{
   this.personManage=personManage;
}
  public personmanager getPersonmanager()
{
   return personManage;
}    
public String execute(){
   String page = "success";
   boolean flag = false;
   flag = personManage.checkUser(userName);
   if(flag){
    page = "success";
   }
   return page;
}
}

Answer 13

你看你jia包对不对，看看环境
没问的话private personmanager personManage=new personmanager();
这里下能不能用个中间参数调整一下，你可以先声明一个空变量，在函数里边再new

Answer 14

private personmanager personManage=new personmanager();
不要new，直接定义就可以了：private personmanager personManage;
配置文件里注入personManage到action里，名字对应好！
<bean id="loginaction" class="net.loginaction" abstract="false"
  lazy-init="default" autowire="default" dependency-check="default">
  <property name="personmanager">
  <ref bean="personmanager" />
  </property>
</bean>
这里name="personmanager"名字不对啊！
改成personManage！