function checkoutUserlist(){ // js 解析json数组var statuslist = [{"isAvailabe":"1","name":"pacoson"},{"isAvailabe":"0","name":"tangtang"},{"isAvailabe":"0","name":"zhangsan"},{"isAvailabe":"0","name":"lisi"},{"isAvailabe":"0","name":"wangwu"}];						for(var i=0; i<statuslist.length; i++) {alert(statuslist[i].name);}/* for(var i=0; i<data[0].length; i++) {						appendAIntoDiv("second_userlist", data[0][i], data[1][i]);} */} 

// java ArrayList 转 json 数组public void checkoutUserlist(HttpSession session) {List<String> namelist = repository.checkoutUserlist();statuslist = new ArrayList<>(namelist.size());String from = (String) session.getAttribute("curuser");for (String to : namelist) {String isAvailabe = String.valueOf(isUserAvaible(from,to));UserStatus status = new UserStatus(isAvailabe, to);statuslist.add(status);}ObjectMapper mapper = new ObjectMapper();try {String json_result = mapper.writeValueAsString(statuslist);session.setAttribute("statuslist", json_result);		} catch (JsonProcessingException e) {e.printStackTrace();}System.out.println("statuslist.size = " + statuslist.size());}