spring mvc 对异常的处理

1、在控制器添加异常处理@Exception'Handle（异常类名）public String handle（类名）{ return “异常的页面”；}发生指定异常时跳转

2、这种异常处理方式并不能处理404请求错误，需要在web.xml配置错误页面<error-page> <exception-type>java.lang.Throwable</exception-type> <location>/WEB-INF/views/error/404.jsp</location> </error-page>

3、/** * 向所有的用户发送消息 * @param message */ public stat坡纠课柩ic void se荏鱿胫协ndMessage(String message){ Set<WebSocket> keySet = userconnections.keySet(); synchronized (keySet) { for (WebSocket conn : keySet) { String user = userconnections.get(conn); if(user != null){ conn.send(message); } } } }

4、@RequestMapping(value="/delete",method=RequestMethod.GET,produces="text/html;charset=UTF-8") public String delete(RedirectAttributes ra,String id,HttpServletRequest request){

5、HttpSession session = request.getSession();PageData d = (PageData) session.getAttribute("dealer");//单个，集合删除，查询后条件不丢失删除dealerService.deleteAll(StringUtils.StringToList(id));

6、return "redirect:1/dealerList?jyxkz="+StringUtils.nullTo(d.get("jyxkz"))+"&name="+StringUtils.nullTo(d.get("name"))

7、+"&storeName="+StringUtils.nullTo(d.get("storeName"))+"&phone="+StringUtils.nullTo(d.get("phone"));}