//读取网络文件,写入指定的文件中
while ((nRead = input.read(b, 0, 1024)) > 0
&& nStartPos < nEndPos ) {
oSavedFile.write(b, 0, nRead);
nStartPos += nRead;
}
httpConnection.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
}
//; 获得文件长度
public static long getFileSize(String sURL) {
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 = 1i++) {
sHeader = httpConnection.getHeaderFieldKey(i);
if (sHeader != null) {
if (sHeader.equals("Content-Length")) {
nFileLength = Integer.parseInt(httpConnection
.getHeaderField(sHeader));
break;
}
} else
break;
}
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(nFileLength);
return nFileLength;
}
}
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