使用Java访问嵌套的JSON对象值 [英] Access nested JSON object value using java

问题描述

{
    "files": {
        "f1.png": {
            "intext": "A",
            "inval": 0,
            "inbinary": false
        },
        "f2.png": {
            "intext": "A",
            "inval": 0,
            "inbinary": true
        }
    }
}

当f1.png值不固定时如何访问inval值.即文件名可以是任何名称，尚不知道，所以我如何使用Java访问该JSON中各种文件的inval字段值?

How to access value of inval when the f1.png value is not fixed. i.e. the name of file can be anything, its not known so how can I access value for inval field for various files in this JSON using Java?

推荐答案

请尝试以下代码，

import org.json.JSONException;
import org.json.JSONObject;
public static void main(String[] args) {
        String jsonString = "{\"files\": {\"f1.png\": {\"intext\": \"A\",\"inval\": 0,\"inbinary\": false}, \"f2.png\": {\"intext\": \"A\",\"inval\": 0,\"inbinary\": true}}}";
        try {
            JSONObject jsonObject =new JSONObject(jsonString);
            JSONObject jsonChildObject = (JSONObject)jsonObject.get("files");
            Iterator iterator  = jsonChildObject.keys();
            String key = null;
            while(iterator.hasNext()){
                key = (String)iterator.next();
                System.out.println("inval value: "+((JSONObject)jsonChildObject.get(key)).get("inval"));
            }
        }
        catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

希望它可以解决您的问题

Hope it solves your issue

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