In-site messages, group messages and all messages. Gson parsing result

/**
*Send site message
*/
@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; //Record the number sent
String msg = ""; //Record return information
System.out.println("length--->"+userList.length);
System.out.println("content--->"+content);
try{
if(userList.length == 0 ; timeout(10000)
                    .get()
                    .text();
                                              //--->Use Gson to convert the requested data into a MAP structure
                                  .text();
                          .
>() {}.getType ());
                                           //---> Take out the Object type data required in MAP and convert it into a List                                                                                                                                                                                                             . Gson converts List to Json             String str = new Gson().toJson(list);