Parse json in js to read object in List

1. If the background action is sent to the foreground, the map must be converted to json format.

Map

 
  
ResultMap; JSONObject json = JSONObject. fromObject (resultMap); message = json. toString ();

 

List stores multiple student objects
2. Convert the result json string to an object in front-end js.

Var obj = eval ("(" + data + ")");

3. Retrieve objects in the list

For (var key in obj) {// obtain the list var List = obj [key] in the first loop; for (var student in List) {// The second-level loop retrieves the alert (list [student] object in the List. id); alert (List [student]. name );}}