java实现ftp文件上传下载功能

package getUrlPic;

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

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

public class FtpUploadFile {
 public static void main(String[] args){
// public static boolean uploadFile(String url,int port,String username, String password, String path, String filename, InputStream input) {
// boolean success = false;
 FTPClient ftp = new FTPClient();
 InputStream input = null;
 try {
 int reply;
 ftp.connect("localhost", 21);//连接FTP服务器
 //如果采用默认端口，可以使用ftp.connect(url)的方式直接连接FTP服务器
 ftp.login("test", "test");//登录
 reply = ftp.getReplyCode();
 if (!FTPReply.isPositiveCompletion(reply)) {
 ftp.disconnect();
 System.out.println("can not connect");
// return success;
 }else{
 ftp.setFileType(FTPClient.BINARY_FILE_TYPE); 
// ftp.changeWorkingDirectory(path);
 input = new ByteArrayInputStream("中xuxxx".getBytes("utf-8"));
 ftp.storeFile("test.txt", input);
 
 // 创建目录
 ftp.makeDirectory("/test/bb");
 
 //列出目录
 FTPFile[] dirs = ftp.listDirectories("/test");
 for(FTPFile f : dirs ){
 System.out.println(f.getName());
 }
 }
// ftp.changeWorkingDirectory(path);
// ftp.storeFile(filename, input); 
 
// input.close();
// ftp.logout();
// success = true;
 } catch (IOException e) {
 e.printStackTrace();
 } finally {
 if(input != null){
 try{
 input.close();
 }catch(IOException e){
 e.printStackTrace();
 }
 }
 if (ftp.isConnected()) {
 try {
 ftp.disconnect();
 } catch (IOException ioe) {
 }
 }
 }
// return success;
 }
// }
}