// 获得文件长度
public long getFileSize() {
int nFileLength = -1;
try {
URL url = new URL(siteInfoBean.getSSiteURL());
HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
httpConnection.setRequestProperty("User-Agent", "NetFox");
int responseCode = httpConnection.getResponseCode();
if (responseCode >= 400) {
processErrorCode(responseCode);
return -2; // -2 represent access is error
}
String sHeader;
for (int i = 1; ; i++) {
// DataInputStream in = new
// DataInputStream(httpConnection.getInputStream ());
// Utility.log(in.readLine());
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();
}
Utility.log(nFileLength);
return nFileLength;
}
public void run() {
// 获得文件长度
// 分割文件
// 实例FileSplitterFetch
// 启动FileSplitterFetch线程
// 等待子线程返回
try {
if (bFirst) {
nFileLength = getFileSize();
if (nFileLength == -1) {
System.err.println("File Length is not known!");
} else if (nFileLength == -2) {
System.err.println("File is not access!");
} else {
for (int i = 0; i < nStartPos.length; i++) { // 分割
nStartPos[i] = (long) (i * (nFileLength / nStartPos.length));
}
for (int i = 0; i < nEndPos.length - 1; i++) { // 分割
nEndPos[i] = nStartPos[i + 1];
}
nEndPos[nEndPos.length - 1] = nFileLength;
}
}
// 启动子线程
fileSplitterFetch = new FileSplitterFetch[nStartPos.length];
for (int i = 0; i < nStartPos.length; i++) {
fileSplitterFetch[i] =
new FileSplitterFetch(
siteInfoBean.getSSiteURL(),
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
nStartPos[i],
nEndPos[i],
i);
Utility.log("Thread " + i + " , nStartPos = " + nStartPos[i] + ", nEndPos = " + nEndPos[i]);
fileSplitterFetch[i].start();
}
/*
* fileSplitterFetch[nPos.length-1] = new
* FileSplitterFetch(siteInfoBean.getSSiteURL(),
* siteInfoBean.getSFilePath()+ File.separator +
* siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
* Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " +
* nPos[nPos.length-1] + ", nEndPos = " + nFileLength);
* fileSplitterFetch[nPos.length-1].start(); 等待子线程结束 int count = 0;
* 是否结束while循环
*/
boolean breakWhile = false;
while (!bStop) {
write_nPos();
Utility.sleep(500);
breakWhile = true;
for (int i = 0; i < nStartPos.length; i++) {
if (!fileSplitterFetch[i].bDownOver) {
breakWhile = false;
break;
}
}
if (breakWhile) break;
// count++;
// if(count>4)
// siteStop();
}
System.err.println("文件下载结束！");
} catch (Exception e) {
e.printStackTrace();
}
}