dwz ajax session超时跳转登录页（struts2自定义拦截器）

1.定义struts2拦截器（网上例子很多）

代码如下：

package rt.intercepter;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import rt.pojo.UserInfo;
import rt.util.Struts2Utils;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class LoginValidate extends AbstractInterceptor {

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Override
    public String intercept(ActionInvocation invocation) throws Exception {
        System.out.println("interceptor intercept"); 
        Map<String, Object> session = invocation.getInvocationContext().getSession();
        UserInfo userInfo = (UserInfo) session.get("userInfo");
        HttpServletRequest request = Struts2Utils.getRequest();
        if ("XMLHttpRequest".equalsIgnoreCase(request.getHeader("X-Requested-With")) || request.getParameter("ajax") != null) {
            if(null == Struts2Utils.getSession() || null == userInfo){
                Struts2Utils.getResponse().getWriter().write("{"statusCode":"301", "message":"会话已过期!请重新登录!"}");
                return null;
            }  
        }
        return invocation.invoke();
    }
}

2、配置拦截器

<!-- 用于CRUD Action的parent package -->
    <package name="crud-default" extends="convention-default">
        <!-- 基于paramsPrepareParamsStack,
            增加store interceptor保证actionMessage在redirect后不会丢失 -->
        <interceptors>
        <span style="color: #ff0000;"><interceptor name="sessionout" class="rt.intercepter.LoginValidate" /></span> <interceptor-stack name="crudStack"> <interceptor-ref name="timer"/> <interceptor-ref name="logger"/> <interceptor-ref name="store"> <param name="operationMode">AUTOMATIC</param> </interceptor-ref> <interceptor-ref name="paramsPrepareParamsStack" /> <span style="color: #ff0000;"><interceptor-ref name="sessionout"/></span> </interceptor-stack> </interceptors> <default-interceptor-ref name="crudStack" /> </package>

3.测试：

登录后，等一分钟，点击出现登录超时，并跳转到了登录页面。

如果想session超时之后设置页面不跳转，而是弹出框登录，请在dwz的初始化页面内修改：

<script type="text/javascript">
        $(function(){
            DWZ.init("dwz.frag.xml", {
                loginUrl:"login_dialog.html", loginTitle:"登录",    // 弹出登录对话框
                //loginUrl:"login.jsp",    // 跳到登录页面
                statusCode:{ok:200, error:300, timeout:301}, //【可选】
                keys: {statusCode:"statusCode", message:"message"}, //【可选】
                pageInfo:{pageNum:"pageNum", numPerPage:"numPerPage", orderField:"orderField", orderDirection:"orderDirection"}, //【可选】
                debug:false,    // 调试模式 【true|false】
                callback:function(){
                    initEnv();
                    $("#themeList").theme({themeBase:"themes"});
                    setTimeout(function() {$("#sidebar .toggleCollapse div").trigger("click");}, 10);
                }
            });
        });
        
        </script>

这样就完成了，希望能给大家带来帮助.