1、首先需要安装org.json.jar
2、类JSONObject用于创建一个json对象。其中的JSONObject.put(KEY, VALUE)用于向其中添加条目
3、JSONObject.getString(KEY)则用于从json对象中获取KEY对应的VALUE，且VALUE的类型为String
4、有时候，VALUE又是一个子json对象，此时我们可以用JSONObject.get(KEY)方法，从中KEY对应的子json对象，并将其类型转换为JSONObject
5、重复以上操作即可递归获取所要获取的内嵌VALUE字段
代码示例：
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 + "\"");
}
输出：
{"education":{"university":"HUST","highschool":"XSHS"},"name":"monster","hobby":{}}
"monster" finished university at "HUST"
