使用JAVA从URL进行JSON解码

Question

I'm using this piece of code to grab json from a url and decode the inputstream with UTF8

    try {
        InputStream is;
            is = new URL(url).openStream();
      BufferedReader rd = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8));
      StringBuilder sb = new StringBuilder();
      int cp;
      while ((cp = rd.read()) != -1) {
        sb.append((char) cp);
        System.out.println(cp + "  " + ((char) cp));
      }
      JSONArray json = new JSONArray(sb.toString());
      return json;
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
    }

When I run it on a website http://www.somewebsite.com/data.json I get a bunch of jibberish

Here are the first two chars that I get back (3 and 65533)

31
65533 \�

I understand the 65533 is a replacement character so I'm doing something wrong with encoding.

I tried uploading this same json text to another website

http://ex . www.someotherwebsite.com/abcd It decodes fine.

I tried downloading both files and they are both UTF8. Is it because one is a .json file and the other one is not?

Answer 1

Try this method Charset.forName("UTF-8").encode(your-data-in-string) . Or if this String is in a servlet and you want to send it as a response, use setCharacterEncoding("UTF-8") with the response object .

Answer 2

You are just converting the charset. If you are getting data from the url, you should check if the parameter is url encoded and decoded it before parsing the JSON string.

Answer 3

If anyone is wondering, the json file was not utf-8. I was trying to decode using utf-8 when it was gzip encoded.