int nFileLength = -1;
try {
URL url = new URL(sURL);
HttpURLConnection httpConnection = (HttpURLConnection) url
.openConnection();
httpConnection.setRequestProperty("User-Agent", "Internet Explorer");
int responseCode = httpConnection.getResponseCode();
if (responseCode >= 400) {
System.err.println("Error Code : " + responseCode);
return -2; // -2 represent access is error
}
String sHeader;
for (int i = 1;; i++) {
sHeader = httpConnection.getHeaderFieldKey(i);
if (sHeader != null) {
if (sHeader.equals("Content-Length")) {
.getHeaderField(sHeader));
break;
}
} else
break;
}
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(nFileLength);
return nFileLength;
}
}
作者“海纳百川，有容乃大”