session过期处理

public class SessionOutDateFilter extends AdviceFilter{
    
    private String redirectUrl="http://url/portal";//session 失效之后需要跳转的页面
    private String platformUrl="http://url/kms/a/login";
    //排除这个链接 其他的链接都会进行拦截
    private String loginUrl="/kms/a/login";
    private String frontUrl="cms/f";
    private String uploadUrl="cms/article/plupload";
    private String appUrl="a/app";
    
    protected boolean preHandle(ServletRequest request, ServletResponse response){
        Principal principal = UserUtils.getPrincipal();
        HttpServletRequest req=(HttpServletRequest) request;
        String uri=req.getRequestURI();
        if(checkUrl(uri, loginUrl,frontUrl,uploadUrl,appUrl)|(principal!=null&&!principal.isMobileLogin())){
            
            return true;
        }
        
        try {
            issueRedirect(request,response,redirectUrl);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
    
    
      protected void issueRedirect(ServletRequest request, ServletResponse response, String redirectUrl)
         throws Exception
      {      
          
          String url="<a href="+redirectUrl+" target=\"_blank\" onclick=\"custom_close()\">重新登录<a/> ";
          String platform="<a href="+platformUrl+" target=\"_blank\" onclick=\"custom_close()\">直接登录<a/> ";
          
          HttpServletResponse resp=(HttpServletResponse) response;
          HttpServletRequest req=(HttpServletRequest) request;
          response.setContentType("text/html;charset=UTF-8");
          PrintWriter out=resp.getWriter();
          out.print("<script language='javascript'>");
          out.print("function custom_close(){" +
                      "self.opener=null;" +
                      "self.close();}");
          out.print("</script>");
          out.print("没有权限或者验证信息过期，请点击"+url+"登录portal<br/>");
          out.print("直接登录"+platform);
      }


      public String getRedirectUrl() {
        return redirectUrl;
    }


    public void setRedirectUrl(String redirectUrl) {
        this.redirectUrl = redirectUrl;
    }


    public String getLoginUrl() {
        return loginUrl;
    }


    public void setLoginUrl(String loginUrl) {
        this.loginUrl = loginUrl;
    }
    
    /**
     * 排除一些url不进行拦截
     * @param targetUrl
     * @param urls
     * @return
     */
    private boolean checkUrl(String targetUrl,String ...urls){
        for(int i=0;i<urls.length;i++){
            if(targetUrl.contains(urls[i])){
                return true;
            }
        }
        
        return false;
    }
}

 

来源：https://www.cnblogs.com/java-llp/p/11381928.html