HttpURLConnection.getInputStream java.io.FileNotFoundException

判断getResponseCode，当返回不是HttpURLConnection.HTTP_OK， HttpURLConnection.HTTP_CREATED， HttpURLConnection.HTTP_ACCEPTED 时，不能用getInputStream()，而是应该用getErrorStream()

public String sendGet(String url, String param) {		StringBuilder result = new StringBuilder();		BufferedReader in = null;		try {			String urlNameString = url + "?" + param;			URL realUrl = new URL(urlNameString);			URLConnection httpConnect = realUrl.openConnection();			HttpURLConnection httpUrlConnection = (HttpURLConnection) httpConnect; 			httpUrlConnection.connect();		    	int responseCode = httpUrlConnection.getResponseCode();  		    	InputStream inputStream = null;  		    	if (responseCode == 200) {  		    		inputStream = new BufferedInputStream(httpUrlConnection.getInputStream());  		   	} else {  		    		inputStream = new BufferedInputStream(httpUrlConnection.getErrorStream());  		    	}  			//in = new BufferedReader(new InputStreamReader(httpConnect.getInputStream(), "UTF-8"));		    	in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));			String line;			while ((line = in.readLine()) != null) {				result.append(line);			}		} catch (Exception e) {			result.append(logUtil.getErrorStr(e));		} finally {			try {				if (in != null) {					in.close();				}			} catch (Exception e2) {				result.append(logUtil.getErrorStr(e2));			}		}		return result.toString();	}