java - JSONParser 在位置 0 处返回意外字符 ()

Question

我在解析 JSON 时遇到问题。我总是尝试这样做，结果返回了:位置 0 处的意外字符 ()。

public Object execute(HttpRequestBase request){
    DefaultHttpClient client = new DefaultHttpClient();
    HttpResponse response = null;
    Object object = null;

    try {
        response = client.execute(request);
        InputStream is = response.getEntity().getContent();
        BufferedReader br = new BufferedReader(new InputStreamReader((is)));
        StringBuilder builder = new StringBuilder();
        String output;

        while ((output = br.readLine()) != null) {
            builder.append(output).append("\n");    
        }

         if (response.getStatusLine().getStatusCode() == 200) { 
            object = new JSONParser().parse(builder.toString());
            client.getConnectionManager().shutdown();
        } else {
             LOG.log(Level.SEVERE, builder.toString());
             throw new RuntimeException(builder.toString());
         }

    } catch (IOException | ParseException ex) {
        LOG.log(Level.SEVERE, ex.toString());
    } finally {

    }

    return object;
}

PS:

我的响应返回一个格式良好的 JSON；

这段代码运行时出现问题object = new JSONParser().parse(builder.toString());

这是我的 JSON 文件的一部分:

    [
   {
      "id":2115,
      "identificacao":"17\/2454634-6",
      "ultima_atualizacao":null
   },
   {
      "id":2251,
      "identificacao":"17\/3052383-2",
      "ultima_atualizacao":"2017-11-21"
   },
   {
      "id":2258,
      "identificacao":"17\/3070024-6",
      "ultima_atualizacao":null
   },
   {
      "id":2257,
      "identificacao":"17\/3070453-5",
      "ultima_atualizacao":null
   }
]

Answer 1

很可能您的内容一开始就有一些未打印的特殊字符。对于 UTF-8 编码的数据，这可能是一个 BOM。

请将您内容的开头发布为 byte[] .