How to convert Json format

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Sometimes it needs to be converted to object, string,map, and so on.

We introduce the dependency of com.alibaba.fastjson.JSONObject

Start the conversion of the format below:

The json data are as follows

{

"providerId": 1

"apiJson": {

"type": {}

"code": "GJWL170415007"

"name": "a"

}

}

Json → String:

String jsonStr = params.getJSONObject ("apiJson") .toString

String → entity class:

User user=

JSONObject.parseObject (jsonStr.toString (), User.class)

Json → Map:

Map map= (Map) JSONObject.parse (String.valueOf (params))

Map → Json:

Map map = new HashMap ()

Map.put ("a", "aaa")

Map.put ("b", "bbb")

Map.put ("c", "ccc")

String json=JSON.toJSONString (map)

System.out.println (json); / / output {"a": "aaa", "b": "bbb", "c": "ccc"}

Json → Array:

JSONArray array=JSONArray.fromObject (stu)

String strArray=array.toString (); the above is all the content of the article "how to convert Json format". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!