java.io.EOFException：响应在0字节后有流结束

Question

我正在尝试使用抛出 java.io.EOFException的java代码来调用Web服务：对于大块数据，响应在0字节后的流结束。

相同的Web服务调用在Postman REST Client中有效，但Java代码会引发错误，并且无法获取Web服务响应。 有人可以帮我这个吗？

以下是供参考的代码段：

        String output;          
        URL url = new URL(wsUrl);             //wsUrl is a web service URL

        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        String authorization = "**************" + ":" + "*********";
        String basicAuth = "Basic " + java.util
                                          .Base64
                                          .getEncoder()
                                          .encodeToString(authorization.getBytes());
        conn.setRequestProperty("Authorization", basicAuth);
        conn.setRequestProperty("Accept", "application/json");
        if (conn.getResponseCode() != 200) {
            throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());
        }
        BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));
        System.out.println("Output from Server .... \n");
        String jsonstring = new String();
        while ((output = br.readLine()) != null) {
           System.out.println(output);
        }
        conn.disconnect();