org.apache.commons.net.ftp.FTPClient上传、下载、修改文件等功能

package com.limi.ftp;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

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

public class FtpUtil {
	private String ip = "";
	private String username = "";
	private String password = "";
	private int port = -1;
	private String directory = "";
	private String srcUrl = "";
	private String localUrl = "";
	FTPClient ftpClient = null;
	private OutputStream fos = null;
	private FileInputStream fis = null;

	public FtpUtil(String serverIP, int port, String username, String password,
			String srcUrl,String directory,String localUrl) {
		this.ip = serverIP;
		this.username = username;
		this.password = password;
		this.port = port;
		this.srcUrl = srcUrl;
		this.directory = directory;
		this.localUrl = localUrl;
	}

	public boolean connectServer() {
		if (ftpClient == null) {
			ftpClient = new FTPClient();
		}
		try {
			if (port != -1) {
				ftpClient.connect(this.ip, this.port);
			}
			boolean result = ftpClient.login(this.username, this.password);
			ftpClient.changeWorkingDirectory(this.directory);
			// 设置文件类型（二进制）
			ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
			ftpClient.setBufferSize(1024);
			return result;
		} catch (Exception e) {
			e.printStackTrace();
		}
		return false;
	}

	public boolean upload() {
		try {
			File srcFile = new File(this.srcUrl);
			fis = new FileInputStream(srcFile);
			ftpClient.setControlEncoding("gbk");
			//存储文件==上传文件
			boolean result = ftpClient.storeFile(srcFile.getName(), fis);
			return result;

		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("上传是失败！");
		}finally{
			try {
				fis.close();
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return false;
	}

	public void download(){
		File downFile = null;
		boolean result = true;
		try{
			//每次数据连接之前，ftp client告诉ftp server开通一个端口来传输数据。
			ftpClient.enterLocalPassiveMode();
			String[] strArr = getFile();
			for(int i=0;strArr!=null&i<strArr.length;i++){
				downFile = new File(this.localUrl+"\\"+strArr[i]);
				fos = new FileOutputStream(downFile);
				//检索文件==下载文件
				result = ftpClient.retrieveFile(strArr[i], fos);
				if(!result){
					System.out.println(strArr[i]+"下载失败！");
				}
			}
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			try {
				fos.close();
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	public boolean remove(){
		try {
			return ftpClient.deleteFile("a.png");
		} catch (IOException e) {
			e.printStackTrace();
		}//删除远程文件	
		return false;
	}
	
	public boolean rename(){
		//每次数据连接之前，ftp client告诉ftp server开通一个端口来传输数据。
		ftpClient.enterLocalPassiveMode();
		try {
			ftpClient.rename("3111.jpg", "3.png");
		} catch (IOException e) {
			e.printStackTrace();
		}
		return false;
	}
	
	public boolean makeDir(){
		//每次数据连接之前，ftp client告诉ftp server开通一个端口来传输数据。
		ftpClient.enterLocalPassiveMode();
		try {
			return ftpClient.makeDirectory("ems");
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		return false;
	}
	
	public boolean renameDir(){
		ftpClient.enterLocalPassiveMode();
		try {
			return ftpClient.rename("ems", "ems1");
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return false;
	}
	
	public boolean removeDir(){
		ftpClient.enterLocalPassiveMode();
		try {
			return ftpClient.removeDirectory("ems1");
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try {
				ftpClient.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return false;
	}
	
	public String[] getFile(){
		try {
			ftpClient.enterLocalPassiveMode();
			String[] strArr = ftpClient.listNames();
			return strArr;
		} catch (IOException e) {
			e.printStackTrace();
		}
		return null;
	}
}

养成做笔记的习惯吧，用到了就来看看。

转载于:https://my.oschina.net/u/2409704/blog/862165