Java 嵌套解析 json

1、首先需要安裝org.json.jar

2、類JSONObject用於創建一個json對象。其中的JSONObject.put(KEY, VALUE)用於向其中添加條目

3、JSONObject.getString(KEY)則用於從json對象中獲取KEY對應的VALUE，且VALUE的類型為String

4、有時候，VALUE又是一個子json對象，此時我們可以用JSONObject.get(KEY)方法，從中KEY對應的子json對象，並將其類型轉換為JSONObject

5、重復以上操作即可遞歸獲取所要獲取的內嵌VALUE字段

 

代碼示例：

import org.json.JSONObject;

public class JsonTest {
        public static void main(String[] args) {
                JSONObject json = new JSONObject();
                json.put("name", "monster");
                JSONObject education = new JSONObject();
                education.put("highschool", "XSHS");
                education.put("university", "HUST");
                json.put("education", education);
                JSONObject hobby = new JSONObject();
                json.put("hobby", hobby);
                System.out.println(json);

                String name = json.getString("name");
                JSONObject object = (JSONObject)json.get("education");
                String university = object.getString("university");

                System.out.println("\"" + name + "\" finished university at \"" + university + "\"");
        }
}

 

輸出：

{"education":{"university":"HUST","highschool":"XSHS"},"name":"monster","hobby":{}}
"monster" finished university at "HUST"