Java 简单的遍历FTP目录并打印

先去网上找2个jar包：jakarta-oro.jar、commons-net-1.4.1.jar

import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;

public class GetFTP {

    //用来打印的时候分层
    public String level = "";

    public FTPClient loginFTP(String host, String user, String pass)
            throws IOException {
        FTPClient ftp = new FTPClient();
        ftp.setControlEncoding("GBK");
        ftp.connect(host, 21);
        ftp.login(user, pass);
        return ftp;
    }

    public void ftpClose(FTPClient ftp) {
        try {
            ftp.logout();
            if (ftp.isConnected()) {
                ftp.disconnect();
            }
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }
    }

    public void ListFTP(FTPClient ftpClient, String path) {
        String gbkname;
        InputStream is = null;
        try {
            FTPFile[] files = ftpClient.listFiles(path);
            for (int i = 0; i < files.length; i++) {
                if (files[i].isDirectory()) {
                    if (!files[i].getName().equals(".")
                            && !files[i].getName().equals("..")) {
                        String tempDir = ftpClient.printWorkingDirectory()
                                + "/" + files[i].getName();
                        ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
                        gbkname = files[i].getName();
                        ftpClient.storeFile(new String(gbkname.getBytes("GBK"),
                                "iso-8859-1"), is);
                        countlevel(ftpClient.printWorkingDirectory());
                        System.out.println(level + gbkname);
                        ftpClient.changeWorkingDirectory(tempDir);
                        ListFTP(ftpClient, tempDir);
                        ftpClient.changeToParentDirectory();
                    }
                } else {
                    countlevel(ftpClient.printWorkingDirectory());
                    System.out.println(level + files[i].getName());
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(1);
        }
    }

    public void countlevel(String path) {
        int n = 0;
        for (int i = 0; i < path.length(); i++) {
            if (path.charAt(i) == '/')
                n++;
        }
        if (n == 1 && path.length() == 1) {
            level = "";
        } else {
            for (int j = 0; j < n; j++) {
                level += "--";
            }
        }
    }

    public static void main(String[] args) throws Exception {
        GetFTP getFTP = new GetFTP();
        FTPClient ftp = getFTP.loginFTP("192.168.30.77", "test001", "test001");
        getFTP.ListFTP(ftp, ftp.printWorkingDirectory());
        getFTP.ftpClose(ftp);
    }

}