问题描述

报错！！！找不到action中welcome方法，求大神们赐教！

HTTP Status 500 - The welcome() is not defined in action class com.opensymphony.xwork2.ActionSupport

---

type Exception report

message The welcome() is not defined in action class com.opensymphony.xwork2.ActionSupport

description The server encountered an internal error that prevented it from fulfilling this request.

exception

java.lang.IllegalArgumentException: The welcome() is not defined in action class com.opensymphony.xwork2.ActionSupport
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:454)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)

 LoginAction类代码：package com.test.bean.web;import org.springframework.beans.factory.annotation.Autowired;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.Preparable;import com.test.bean.entity.base.User;import com.test.bean.service.base.UserManager;/**系统登录@author Administrator**/@SuppressWarnings(""serial"")public class LoginAction extends ActionSupport implements Preparable{private String username; //登录用户名private String password; //登录密码@Autowiredprivate UserManager userManager; //操作员管理Sessionpublic String welcome(){return list();}public String list(){return SUCCESS;}public String login(){//获取用户信息User user=userManager.getUser(username password);if(user == null){addActionError(""用户名或密码不正确！"");return SUCCESS;}ActionContext actioncontext=ActionContext.getContext();actioncontext.getSession().put(""user"" user);return ""index"";}public String loginRedirect(){return ""index"";}public String logout(){//退出时清空session中的内容ActionContext actioncontext=ActionContext.getContext();actioncontext.getSession().put(""user"" null);return SUCCESS;}/**防止重复提示错误信息 */ public void prepare(){ // TODO Auto-generated method stub clearErrorsAndMessages(); } public void setUsername(String username){ this.username=username; } public void setPassword(String password){ this.password=password; } }

解决方案

LoginAction类代码：
package com.test.bean.web;

import org.springframework.beans.factory.annotation.Autowired;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.Preparable;
import com.test.bean.entity.base.User;
import com.test.bean.service.base.UserManager;

/**

• 系统登录
• @author Administrator
  *
  */
  @SuppressWarnings(""serial"")
  public class LoginAction extends ActionSupport implements Preparable{

  private String username; //登录用户名
  private String password; //登录密码

  @Autowired
  private UserManager userManager; //操作员管理Session
  public String welcome(){
  return list();
  }

  public String list(){
  return SUCCESS;
  }

  public String login(){
  //获取用户信息
  User user=userManager.getUser(username password);
  if(user == null){
  addActionError(""用户名或密码不正确！"");
  return SUCCESS;

  }
  ActionContext actioncontext=ActionContext.getContext();
  actioncontext.getSession().put(""user"" user);
  return ""index"";
  }
  public String loginRedirect(){
  return ""index"";
  }
  public String logout(){
  //退出时清空session中的内容
  ActionContext actioncontext=ActionContext.getContext();
  actioncontext.getSession().put(""user"" null);
  return SUCCESS;
  }

  /**

  • 防止重复提示错误信息*/public void prepare(){// TODO Auto-generated method stubclearErrorsAndMessages();}public void setUsername(String username){this.username=username;}public void setPassword(String password){this.password=password;}}

解决方案二：
Struts版本包有问题，就是说你的jar包兼容问题，最好是所有的jar都是一个地方获取的，东拼西凑的jar包就可能出现你这个问题

解决方案三：
struts.xml里没配啊