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);
}
}

代码如下：

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

<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>

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