问题描述
这个问题先前已经问过了,但是我无法从对这些问题的回答中找出代码中的错误.
This question has been asked earlier, but I am unable to figure out the error in my code from the responses to those questions.
我正在尝试将Java字符串转换为json对象.这是代码:
I am trying to convert a java string into json object.Here is the code:
import org.json.JSONObject;
//Other lines of code
URL seatURL = new URL("http://freemusicarchive.org/api/get/genres.json?api_key=60BLHNQCAOUFPIBZ&limit=2");
//Return the JSON Response from the API
BufferedReader br = new BufferedReader(new InputStreamReader(seatURL.openStream(),Charset.forName("UTF-8")));
String readAPIResponse = " ";
StringBuilder jsonString = new StringBuilder();
while((readAPIResponse = br.readLine()) != null){
jsonString.append(readAPIResponse);
}
JSONObject jsonObj = new JSONObject(jsonString);
System.out.println(jsonString);
System.out.println("---------------------------");
System.out.println(jsonObj);
输出为:
{"title":"Free Music Archive - Genres","message":"","errors":[],"total":"163","total_pages":82,"page":1,"limit":"2","dataset":[{"genre_id":"1","genre_parent_id":"38","genre_title":"Avant-Garde","genre_handle":"Avant-Garde","genre_color":"#006666"},{"genre_id":"2","genre_parent_id":null,"genre_title":"International","genre_handle":"International","genre_color":"#CC3300"}]}
---------------------------
{}
因此,如您所见,jsonstring正在获取数据,而jsonObj没有.我正在使用org.json JAR.
So, as you can see, the jsonstring is getting the data, but the jsonObj does not.I am using org.json JAR.
推荐答案
您正在将StringBuilder
类的实例传递给JSONObject
构造函数.
You are passing into the JSONObject
constructor an instance of a StringBuilder
class.
这是使用JSONObject(Object)
构造函数,而不是JSONObject(String)
构造函数.
This is using the JSONObject(Object)
constructor, not the JSONObject(String)
one.
您的代码应为:
JSONObject jsonObj = new JSONObject(jsonString.toString());
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