java读取网络流的问题：报错

问下大家，java读取网络流出现了问题了，读取流的代码如下：

        /**
	 * 发送HTTP请求
	 * 
	 * @param url
	 *            请求的路径地址
	 * @return JSON字符串s
	 */
	public static String URLCon(String url) {
		String s = null;
		HttpURLConnection con = null;
		try {
			URL urlt = new URL(url);
			con = new HttpURLConnection(urlt, null);
			con.setRequestProperty("Accept", "application/json");
			con.setUseCaches(false);
			con.setRequestProperty("Accept-Charset", "utf-8");
			con.connect();
			InputStream in = (InputStream) con.getContent();
			int count = 0;
			while (count == 0) {
				count = in.available();
			}
			byte[] b = new byte[count];
			int readCount = 0; 
			while (readCount < count) {
				readCount += in.read(b, readCount, count - readCount);
			}
			s = new String(b, "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if (null != con) {
				con.disconnect();
			}
		}
		return s;
	}

我说下问题，我从window下测试的时候能全部读取进来，但是从Linux服务器上面就只读取了一部分数据，读不全，请问大家有没有遇到过这种问题啊，O(∩_∩)O谢谢了！！！