拦截器退出登录 判断跳转的问题...求教

Question

首先运行项目（index.jsp）：

  ![图片说明](https://img-ask.csdn.net/upload/201803/19/1521442431_934828.png)

##后台Controller处理请求

跳到主页

下面就是登录进入主页，如进入管理员页面，并且点击退出 ：

# 拦截器代码：

但是一旦退出到home页 页面就是空了........
不晓得咋的回事.....求教这个拦截器咋写

Answer 1

@Override
public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
        throws Exception {
    // TODO Auto-generated method stub

}

@Override
public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
        throws Exception {


}

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
        Object handler) throws Exception {

    //获取Session  
    HttpSession session = request.getSession();  
    String username = (String)session.getAttribute("username");  
      System.out.println(username);
    if(username != null){  
        return true;  
    }  
    //不符合条件的，跳转到登录界面  
    String path=request.getContextPath()+"/front/home";
    response.sendRedirect(path);
    return false;  
}