如何将 JSON 字符串解析为 Java 中的字符串

Question

I have a JSON string, how can I parse it and just get the valueString in java?

{
"resourceType": "Bundle",
"id": "0",
"entry": [
    {
        "resource": {
            "resourceType": "Basic",
            "extension": [
                {
                    "url": "http://ith.sahra.com/extensions#uploadid",
                    "valueString": "1589355494289_655"
                }
            ]
        }
    }
]

}

This is my code, I tried to call extension I got null but I got response while calling entry

 public static String ParsingValue(String valuepass) throws org.json.simple.parser.ParseException{
    Object obj = new JSONParser().parse(valuepass);
    JSONObject jo = (JSONObject) obj;
    //JSONArray msg = (JSONArray) jo.getClass();
    JSONArray result = (JSONArray) jo.get("entry");
}

Answer 1

The easiest way to parse a string through Jackson parser

Eg:

ObjectMapper mapper = new ObjectMapper();
String json = "{\"name\":\"anshul\",\"age\":29}";
Map<String, Object> map = mapper.readValue(json, Map.class);

Try this, it should solve your problem.