===========map和json串的互相转换===========");
Map map = new HashMap();
map.put("aKey", "aVal...200,\"cKey\":{\"id\":0,\"username\":null,\"password\":null,\"email\":null,\"phone\":null},\"aKey\":\"aVal...json串:{"bKey":200,"cKey":{"id":0,"username":null,"password":null,"email":null,"phone":null},"aKey":"aVal..."}
json串-->map:{bKey=200, cKey={id=0, username=null, password=null, email=null, phone=null}, aKey=aVal...json串的互相转换===========");
Map map = new HashMap();
map.put("aKey", "aVal