How to send the nested json in POST Request via postman

Question

I am writing project with Java Play Framework 2.5,

and I want to do POST request with nested json via postman

I need to do something like below:

{lesson:{
   "id":1,
   "name":"Biology"
}}

Answer 1

在邮递员的值字段中，输入json格式，例如

{key:value}

Answer 2

I've solved my problem,

the problem was in Java code.

Whenever you get the data from the http, you need to convert it by this way:

String jsonToString = new String(mainJson.get("lesson").toString());

not by this:

Object jsonToString = mainJson.get("lesson").toString()

Also, in postman, I did it as sysquare mentioned