迅雷下载接口java实现

import com.sun.jna.Native; import com.sun.jna.NativeLong; import com.sun.jna.WString; import com.sun.jna.ptr.LongByReference; import com.sun.jna.ptr.NativeLongByReference; import com.sun.jna.win32.StdCallLibrary; /** * * @author Song Kaisong from Northeastern University * @version 1.0 * I rewrite the C program demo from URL=http://222.178.203.72:19005/whst/63/_sgtmcdqokZsenqlzwtmkdhzbnl// by java,we can * easily use and extend the program function,including off-line download, continuous download from * breakpoint and so on. We usually want to get resource such as text, image , sound track and video * for data gaining, however the tools from JDK such as URL,URLConnection is not adaptable to gain sound * and video data. So i try to utilize the bt fuction of XunLei by calling DLL and vastly improve download * speed. */ public class XLDownLoader { String FileName; String Url; long task; /** * * @param FileName saved file path * @param Url pre-downloaded url * @param task taskid */ public XLDownLoader( String FileName,String Url,long task){ this.FileName=FileName; this.Url=Url; this.task=task; } public interface XLDownload extends StdCallLibrary { public boolean XLInitDownloadEngine(); public int XLURLDownloadToFile(WString pszFileName, WString pszUrl, WString pszRefUrl, NativeLongByReference lTaskId); public int XLQueryTaskInfo(NativeLong lTaskId, NativeLongByReference plStatus, LongByReference pullFileSize, LongByReference pullRecvSize); public int XLPauseTask(long lTaskId, NativeLongByReference lNewTaskId); public int XLContinueTask(long lTaskId); public int XLContinueTaskFromTdFile(WString pszTdFileFullPath, NativeLongByReference lTaskId); public void XLStopTask(long lTaskId); public boolean XLUninitDownloadEngine(); } /** * * @return 268435467 pre-downloaded file exist in specified file path * -1 Fail to initialize(Fail to find DLL) * 12 Succeed in downloading file of specified url */ public int startTask(){ XLDownload xldownload = (XLDownload) Native.loadLibrary("XLDownload", XLDownload.class); if(false==xldownload.XLInitDownloadEngine()){ System.out.println("Initialize download engine failed"); return -1; } WString pszFileName=new WString(FileName); WString pszUrl=new WString(Url); WString pszRefUrl=new WString(""); NativeLong TaskId=new NativeLong(task); NativeLongByReference lTaskId=new NativeLongByReference(TaskId); int dwRet=xldownload.XLURLDownloadToFile(pszFileName,pszUrl ,pszRefUrl, lTaskId); do{ LongByReference ullFileSize =new LongByReference(0); LongByReference ullRecvSize =new LongByReference(0); NativeLongByReference lStatus=new NativeLongByReference(new NativeLong(-1L)); dwRet=xldownload.XLQueryTaskInfo(TaskId,lStatus,ullFileSize,ullRecvSize); if(0==dwRet){ try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } if ( 0 != ullFileSize.getValue() ) { double douProgress = (double)ullRecvSize.getValue()/(double)ullFileSize.getValue(); douProgress *= 100.0; System.out.println(FileName+"Download progress:"+douProgress+"%"); } else { System.out.println("File size is zero.\n"); } if (11==lStatus.getValue().intValue()) { System.out.println("Download successfully.\n"); break; } if ( 12==lStatus.getValue().intValue() ) { System.out.println("Download failed.\n"); break; } } }while(0==dwRet); xldownload.XLStopTask(this.task); xldownload.XLUninitDownloadEngine(); return 12; } public static void main(String[] args){ String FileName="d:\\1-29.mp3"; String Url="http://audio.soundtrack.net/0/0/0/1/1-29.mp3"; long id=0L; XLDownLoader instance=new XLDownLoader(FileName,Url,id); instance.startTask(); } }