struts2实现登录后跳转回本页面

转载地址：

    import java.util.Map;            import javax.servlet.http.HttpServletRequest;      import javax.servlet.http.HttpSession;            import org.apache.log4j.Logger;      import org.apache.struts2.ServletActionContext;            import com.aircom.zzy.util.StringUtil;      import com.opensymphony.xwork2.ActionInvocation;      import com.opensymphony.xwork2.interceptor.AbstractInterceptor;      import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;            //继承可以指定方法的拦截器接口            public class LoginInter extends MethodFilterInterceptor {              private static final long serialVersionUID = -72827036782663208L;               private static  final Logger log = Logger.getLogger(LoginInter.class);                  public final static String SESSION_KEY="regUserId";           public final static String GOTO_URL_KEY="GOING_TO";                    protected String doIntercept(ActionInvocation invocation) throws Exception               {                    HttpServletRequest request=ServletActionContext.getRequest();                                     HttpSession session=request.getSession();                   //通过session 判断用户是否登录                if(session!=null && session.getAttribute(SESSION_KEY)!=null) {                           return invocation.invoke();                    }                   //这里是关键点了 设置客户原来请求的url地址                   setToGoingURL(request, session, invocation);                 return invocation.invoke();               }           private void setToGoingURL(HttpServletRequest request,HttpSession session,ActionInvocation invocation)               {                   //如果referer不为空 直接使用它。如果为空我们分别获得命名空间，action名,以及请求参数                   //从新构造成一个URL保存在session中                   String url=request.getHeader("referer");                   log.info("待转向URL:"+request.getHeader("referer"));                   if(url==null || url.equals(""))                       {                           url="";                           String path=request.getContextPath();                           String actionName=invocation.getProxy().getActionName();                           String nameSpace=invocation.getProxy().getNamespace();                           if(StringUtil.validateNull(nameSpace))                               {                                   url = url+path+nameSpace;                                                                  }                           if(StringUtil.validateNull(actionName))                               {                                   url = url+"/"+actionName+".action"+"?";                               }                                                      Map<String,String[]> zzMap = request.getParameterMap();                           if(zzMap!=null)                               {                                   for(String s:zzMap.keySet())                                       {                                           String[] value=zzMap.get(s);                                           for(String val:value)                                               {                                                   url=url+s+"="+val+"&";                                               }                                                                                  }                               }                           log.info("完整URL:"+url);                       }                          session.setAttribute(GOTO_URL_KEY, url);               }            }  

二、新建统一中间跳转页面login_result.jsp

代码如下：

    <%       String going_to = (String)session.getAttribute("GOING_TO");              if(going_to != null) {        response.sendRedirect(going_to);        }       %>  

三、配置struts.xml文件： 
代码如下：

    <struts>       <package name="login" extends="common">        <interceptors>         <interceptor name="loginInter" class="com.aircom.zzy.interceptor.LoginInter">         </interceptor>        </interceptors>              <action name="login" class="com.aircom.zzy.action.LoginRegistAction" method="login">                  <result name="error">/webapp/login_result.jsp</result>                  <result name="input">/webapp/login_result.jsp</result>                  <result name="success">/webapp/login_result.jsp</result>                <interceptor-ref name="defaultStack"/>         <interceptor-ref name="loginInter">                <!--只拦截这个action中的login方法-->          <param name="includeMethods">login</param>         </interceptor-ref>              </action>              <action name="logout" class="com.aircom.zzy.action.LoginRegistAction" method="logout">                  <result name="success">/webapp/login_result.jsp</result>                <interceptor-ref name="defaultStack"/>         <interceptor-ref name="loginInter">          <param name="includeMethods">logout</param>         </interceptor-ref>              </action>              <!-- The following set is the action for register. -->              <action name="goRegister" class="com.aircom.zzy.action.LoginRegistAction" method="goRegisterPage">                  <result name="success">/webapp/register.jsp?num=1</result>              </action>              <action name="register" class="com.aircom.zzy.action.LoginRegistAction" method="register">                  <result name="success">/webapp/index.jsp</result>                  <result name="input">/webapp/register.jsp?num=1</result>              </action>       </package>      </struts>