1  //demo为JSON格式数据
2  let para ={
3      dataJ: JSON.stringfiy(demo);
4  }
5  //这一段是Vue封装的方法，本质就是一条url
6  this.$http.post('${webRoot}/demo?list', para,{emulateJSON: true});　

 1 @RequestMapping(params = "list")
 2 @ResponseBody
 3 public void treeList(String treedata , HttpServletRequest request, HttpServletResponse response, DataGrid dataGrid){
 4 //      request.getParameterValues("treedata");
 5         JSONArray jsonArray = JSONArray.fromObject(treedata);
 6         for (Object o : jsonArray) {
 7             JSONObject jo = (JSONObject)o;
 8             System.out.println(jo.getString("parent"));
 9         }
10 }

 1     @RequestMapping(params = "query")
 2     public void query(HttpServletRequest request) {
 3         //父级
 4         Map<String,Object> parentMap=new HashMap<String, Object>();
 5         parentMap.put("id", "001");
 6         parentMap.put("name", "王某");
 7         //子级
 8         Map<String,Object> childMap=new HashMap<String, Object>();
 9         childMap.put("id", "child001");
10         childMap.put("name", "王孩子");
11         //将子级Map封装成List
12         List<Map<String,Object>> ChildMapList=new ArrayList<Map<String,Object>>();
13         ChildMapList.add(childMap);
14         //将子级MapList写进父级Map中
15         parentMap.put("children", ChildMapList);
16         //将父级Map封装成List
17         List<Map<String,Object>> parentMapList=new ArrayList<Map<String,Object>>();
18         parentMapList.add(parentMap);
19         //将封装好的数据转换成Json
20         JSONArray arr = JSONArray.fromObject(parentMapList);
21         request.setAttribute("mapList", arr);
22 
23         request.setAttribute("mapList", arr);
24         
25     }