java ftp删除文件的问题

我没有积分，没办法给分了
代码如下，执行fc.sendServer(del) 的时候只能每次删除2、3个文件？问题何在？我执行的是删除7个文件的啊

public class ftpDown{

	FtpClient fc;

	boolean loginOK;  //用来判断是否正常连接服务器

	

	public static void main(String[] args){

		Object[] fileList;

		String[][] address = {

				{"83.16.16.72", "oracle", "fxpg7065"},

				{"83.16.21.121", "admin", "a123456"}

		};

		String[] dir = {"oracle\\iostat_log", "oracle\\vmstat_log"};

		ftpDown fDown = new ftpDown();

		//测试，所以暂且一次循环

		for(int a = 1; a < 2; a++){

			fDown.connect(address[a][0], address[a][1], address[a][2]);

			

			if(fDown.loginOK){

				System.out.println("***************************************");

			

				for(int d = 1; d < 2; d++){

					fileList = fDown.getFileList(dir[d]).toArray();

					Arrays.sort(fileList); //文件排序，保证取得的文件是最老的那些

					int dirLen = dir[d].length();

					int count = 0;

					

					//一周生成7个文件，用8来保证第七个文件已经写入完毕

					if(fileList.length < 8){

						System.out.println("  还没有生够一周的文件(7个)");

					}

					else if(fileList.length > 7){

						for(int i = 0; i < 7; i++){

							boolean isOK = fDown.downLoadFile(dirLen, (String)fileList[i]);

							if(isOK){ //如果成功下载

								count++;

							}

						}

					}

					

					//如果7个文件成功下载本地，则删除服务器上的该文件

					if(count == 7){

						for(int i = 0; i < 7; i++){

							fDown.deleteLoadFile((String)fileList[i]);

						}

					}

				}

				System.out.println("***************************************");	

			}

			fDown.stop();

		}

	}

	

	//获得fileDir目录下的所有文件列表

	public ArrayList getFileList(String fileDir){

		ArrayList aList = null;

		try {

			BufferedReader br = new BufferedReader(new InputStreamReader(fc.nameList(fileDir)));

			aList = new ArrayList();

			String s = "";

			while((s = br.readLine()) != null){

				aList.add(s);

			}

		}catch (IOException e) {

			System.out.println("获取文件列表出错");

		}

		

		return aList;

	}

	

	//下载文件

	public boolean downLoadFile(int dirLen, String fullFileName){

		boolean result = false;

		if(fc != null){

			try{

				int ch;

				String savePath = System.getProperty("user.dir");

				String shotName = fullFileName.substring(dirLen + 1, fullFileName.length());

				File fl = new File(savePath + "\\" + shotName);

				RandomAccessFile getFile = new RandomAccessFile(fl, "rw");

				getFile.seek(0);

				TelnetInputStream fget = fc.get(fullFileName);

				DataInputStream puts = new DataInputStream(fget);

				System.out.print("正在下载 " + shotName + "，请等待...");

				while((ch = puts.read()) >= 0){

					getFile.write(ch);

				}

				

				fget.close();

				getFile.close();

				System.out.println("	下载成功");

				result = true;

			}catch(IOException e){

				result = false;

				System.out.println("	下载失败" + e);

			}

		}

		else

			result = false;

		

		return result;

	}

	

	public void deleteLoadFile(String fileName){

		if(fc != null){

			String del = "DELE " + fileName + " \r\n";

			System.out.print(del); //输出执行的命令

			fc.sendServer(del);

		}

	}

	

	public FtpClient connect(String hostName, String uid, String pwd){

		System.out.println("正在连接 " + hostName + "，请等待...");

		try {

			fc =new FtpClient(hostName);

			fc.login(uid, pwd);

			fc.binary();

			System.out.println("连接主机 " + hostName + " 成功");

			loginOK = true;

		}catch (FtpLoginException ef) {

			System.out.println("请检查用户或密码是否正确！");

			loginOK = false;

		}catch (Exception en) {

			System.out.println("无法与主机连接！");

			loginOK = false;

		}

		return fc;

	}

	

	public void stop(){

		try {

			if(fc != null){

				fc.closeServer();

				System.out.println("与主机连接已断开");

			}

		} catch (IOException e) {

			System.out.println("与主机断开失败" + e);

		}

	}	

}