利用@SkipValidation注释解决validation()方法对所有的方法过滤

今天上午做一博客，在UserAction中有两个方法 ：login() 和 logout(), 还有一个登陆时的validation(),登陆可以运行，但登出时，不运行logout()方法，直接抛出异常：

No result defined for action com.lfq.action.UserAction and result input  

。
查了半天资料才发现，当访问一个action时，会先执行其的validation()方法，若检验失败，会返回ACTION的默认返回值INPUT, 所以当登出时，他这样是不会执行logout()的。
[b]解决的方法：[/b]
（1）、在不需要进行验证的方法加上annotation，即在方法前加上@SkipValidation
（2）为Action中的指定方法指定一个验证规则，命名为Actionname-alias-validation.xml

下面贴上代码：
[b]UserAction[/b]

package com.lfq.action;   

import javax.servlet.http.Cookie;   
import javax.servlet.http.HttpSession;   

import com.lfq.dao.UserDAO;   
import com.lfq.dao.impl.UserDAOImpl;   
import com.lfq.entity.User;   

public class UserAction extends BaseAction {   

    /**  
     *   
     */  
    private static final long serialVersionUID = 1L;   
    private User user;   
    private String msg;  //消息   
    private String userName;   
    private String password;   
    public String getUserName() {   
        return userName;   
    }   
    public void setUserName(String userName) {   
        this.userName = userName;   
    }   
    public String getPassword() {   
        return password;   
    }   
    public void setPassword(String password) {   
        this.password = password;   
    }   
    private boolean rememberMe;   
    public boolean isRememberMe() {   
        return rememberMe;   
    }   
    public void setRememberMe(boolean rememberMe) {   
        this.rememberMe = rememberMe;   
    }   
    public User getUser() {   
        return user;   
    }   
    public void setUser(User user) {   
        this.user = user;   
    }   
    public String getMsg() {   
        return msg;   
    }   
    public void setMsg(String msg) {   
        this.msg = msg;   
    }   


    public String login() {   
        String userName = getUserName();   
        String password = getPassword();   
        if("".equals(userName) || "".equals(password)) {   
            this.msg = "用户名或者密码不允许为空！";   
            return INPUT;   
        }          
        UserDAO userDao = new UserDAOImpl();   
        int userId = userDao.valid(userName, password);   
        if(userId > 0) {   
            if(rememberMe){   
                String t =userId +","+ userName + "," + password;   
                Cookie cookie = new Cookie("COOKIE_KEY_REMEMBER_LOGIN", t);   
                cookie.setMaxAge(86400);   
                super.getResponse().addCookie(cookie);   
            }   
            super.getSession().setAttribute("SESSION_KEY_USERNAME", userName);   
            super.getSession().setAttribute("SESSION_KEY_USERID", userId);   
            return SUCCESS;   

        } else {   
            this.addFieldError("error", "用户名或密码错误");   
            return INPUT;   
        }          
    }   

    public String logout() {   
        System.out.println("------------------------");   
        HttpSession session = getSession();   
        session.removeAttribute("SESSION_KEY_USERID");   
        session.removeAttribute("SESSION_KEY_USERNAME");   
        return SUCCESS;   
    }   

    @Override  
    public void validate() {   
        // TODO Auto-generated method stub   
        if(getUserName() == null || getUserName().trim().equals("")) {   
            addFieldError("userName", getText("user.required"));   
            return;   
        }   
        if(getPassword() == null || getPassword().trim().equals("")) {   
            addFieldError("password", getText("pass.required"));   
            return;   
        }   
    }   
}  

[b]struts.xml[/b]

   
    "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"  
    "http://struts.apache.org/dtds/struts-2.1.7.dtd">   

   
       
       
           
            /admin/login.jsp   
            /admin/index.jsp   
           
           
            /index.jsp   
           
       
  

这样抛出的异常为：

2011-5-26 13:57:14 com.opensymphony.xwork2.util.logging.commons.CommonsLogger error
严重: Could not find action or result
No result defined for action com.lfq.action.UserAction and result input
	at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:364)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:266)
	at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
	at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
	at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
	at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
	at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:395)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
	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:104)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)

[b]解决：[/b]

@SkipValidation
public String logout() {
	System.out.println("------------------------");
	HttpSession session = getSession();
	session.removeAttribute("SESSION_KEY_USERID");
	session.removeAttribute("SESSION_KEY_USERNAME");
	return SUCCESS;
}