站内信，群发与全部发送。Gson解析result

/**
 * 发送站内信
 */
@Permission(Module.TZGL)
@RequestMapping(value = "/sendznx", method = RequestMethod.POST)
@ResponseBody
public String sendZnx(HttpSession session, Model model,
                   @RequestParam(defaultValue = "") String[] userList,
                   @RequestParam(defaultValue = "") String content) throws Exception {
    int rows = 0;       //记录发送数量
    String msg = "";    //记录返回信息
    System.out.println("length--->"+userList.length);
    System.out.println("content--->"+content);
    try{
        if(userList.length == 0){                           //给全体成员发送系统通知
            //全体成员发送
            try{
                String result = Jsoup.connect(NMApi.url() + "/message/userlist").timeout(10000)
                        .get()
                        .text();
                //--->使用Gson把请求回来的数据转成MAP结构
                Map<String,Object> data = new Gson().fromJson(result,new TypeToken<Map<String,Object>>() {}.getType());
                //--->把MAP中需要的Object类型数据取出来，并转成List
                List list = (List)data.get("RecList");
                //--->使用Gson把List转成Json
                String str = new Gson().toJson(list);
                //--->再次使用Gson把Json转成需要的类型
                List<UserInfo> userInfoList = new Gson().fromJson(str,new TypeToken<List<UserInfo>>() {}.getType());
                try{
                    for(UserInfo userInfo : userInfoList){
                        WebMessage webMessage = new WebMessage();
                        webMessage.setClientId(userInfo.getIcid());
                        webMessage.setReceiveTime(new Date());
                        webMessage.setType("系统通知");
                        webMessage.setContent(content);
                        webMessage.setStatus(0);
                        webMessageService.add(webMessage);
                        rows ++;
                    }
                    msg = "发送站内信成功，成功条数："+rows;
                }catch (Exception e){
                    e.printStackTrace();
                    return "群发站内信出错";
                }
            } catch (Exception e) {
                e.printStackTrace();
                return "查询用户列表出错";
            }
        }else{
            for (int i = 0;i < userList.length;i++){        //给部分成员发送管理员消息
                WebMessage webMessage = new WebMessage();
                webMessage.setClientId(Integer.parseInt(userList[i]));
                webMessage.setReceiveTime(new Date());
                webMessage.setType("管理员消息");
                webMessage.setContent(content);
                webMessage.setStatus(0);
                webMessageService.add(webMessage);
                rows ++;
            }
            msg = "发送站内信成功，成功条数："+rows;
            //发件记录
            try {
                User user = (User)session.getAttribute("user");
                MessageLog messageLog = new MessageLog();
                messageLog.setSendTime(new Date());
                messageLog.setType("站内信");
                messageLog.setSender(user.getUnitName());
                messageLog.setReceiver(userList.toString());
                messageLog.setContent(content);
                messageLog.setResult(msg);
                messageLog.setError("");
                int num = messageLogService.add(messageLog);
                System.out.println("生成记录--->"+num);
            }catch (Exception e){
                e.printStackTrace();
                return "生成发信记录出错";
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        return "系统出错";
    }
    return msg;
}