How to convert hashmap to JSON object in Java

Question

How to convert or cast hashmap to JSON object in Java, and again convert JSON object to JSON string?

Answer 1

I'm using Alibaba fastjson, easy and simple:

    com.alibaba
    fastjson
    VERSION_CODE

and import:

import com.alibaba.fastjson.JSON;

Then:

String text = JSON.toJSONString(obj); // serialize
VO vo = JSON.parseObject("{...}", VO.class); //unserialize

Everything is ok.