本文介绍了如何将Java字符串转换为JSON对象的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

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());

这篇关于如何将Java字符串转换为JSON对象的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

08-06 23:01
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