Java实现XMPP发送接收消息和文件功能

package test;
import java.io.File;
import org.jivesoftware.smack.Chat;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.MessageListener;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.XMPPException;
import org.jivesoftware.smack.packet.Message;
import org.jivesoftware.smackx.filetransfer.FileTransfer;
import org.jivesoftware.smackx.filetransfer.FileTransferListener;
import org.jivesoftware.smackx.filetransfer.FileTransferManager;
import org.jivesoftware.smackx.filetransfer.FileTransferRequest;
import org.jivesoftware.smackx.filetransfer.IncomingFileTransfer;
import org.jivesoftware.smackx.filetransfer.OutgoingFileTransfer;
/**
 * 演示XMPP发送接收消息和文件的功能
 *
 * @author 王杰
 * @date 2010-1-14 16:59:24
 */
public class XMPPTest {
 private static void handleTransferRequest(FileTransferRequest request) {
  File file = new File(request.getFileName());
  IncomingFileTransfer transfer = request.accept();
  try {
   transfer.recieveFile(file);
  } catch (XMPPException e) {
   e.printStackTrace();
  }
 }
 /* 发送文件 */
 public static void sendFile(FileTransferManager transferManager,
   String user, File file, XMPPConnection connection) throws Exception {
  OutgoingFileTransfer transfer = transferManager
    .createOutgoingFileTransfer(user);
  long timeOut = 100000;
  long sleepMin = 3000;
  long spTime = 0;
  int rs = 0;
  transfer.sendFile(file, "Send file!");
  rs = transfer.getStatus().compareTo(FileTransfer.Status.complete);
  while (rs != 0) {
   rs = transfer.getStatus().compareTo(FileTransfer.Status.complete);
   spTime = spTime + sleepMin;
   if (spTime > timeOut) {