JSON 只是一种 表示法 ；进行所需的更改
parse，以便可以将更改应用于本机
Javascript对象 ，然后
stringify返回 JSON
var jsonStr = '{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"}]}';var obj = JSON.parse(jsonStr);obj['theTeam'].push({"teamId":"4","status":"pending"});jsonStr = JSON.stringify(obj);// "{"theTeam":[{"teamId":"1","status":"pending"},{"teamId":"2","status":"member"},{"teamId":"3","status":"member"},{"teamId":"4","status":"pending"}]}"
