Java FTP上传下载单个文件示例代码

首先导入两个jar包:commons-io-1.3.2.jar、commons-net-3.0.1.jar。

示例代码如下:

package com;

import org.apache.commons.io.IOUtils;

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

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.FileOutputStream;

public class FtpTest1 {

public static void main(String[] args) {

//以下是我的FTP服务器的信息

String ip="184.171.16.221";

int port=21;

String userName="foqrume2";

String passWord="qazwasx11`12";

String sourceFileUrl="D:\\数据2011-08-1---2011-08-31.xls";

String ftpGoalDir="/bbs/communitypic";

String downDir="c:\\";

String renameFileName="tang.xls";

String downFileName="downtfq.rar";

testUpload(ip,port,userName,passWord,sourceFileUrl,ftpGoalDir,renameFileName);

//testDownload(ip,port,userName,passWord,ftpGoalDir,downDir,downFileName);

}

/**

* FTP上传单个文件测试

*/

/**

*

*/

/***

* 经测试可以上传文件类型:rar,xls,doc,txt,gif

* @ftpGoalDir:ftp服务器的目录

* @sourceFileUrl 上传文件的路径

*

*/

public static boolean testUpload(String ip,int port,String userName,String passWord,String sourceFileUrl,String ftpGoalDir,String renameFileName) {

//上传不成功

boolean res=false;

//创建一个连接FTP服务器对象

FTPClient ftpClient = new FTPClient();

//创建一个文件写入流对象

FileInputStream fis = null;

try {

//连接FTP服务器

ftpClient.connect(ip);

//登录FTP连接

ftpClient.login(userName, passWord);

//创建文件对象

File srcFile = new File(sourceFileUrl);

//向FTP服务器写入文件

fis = new FileInputStream(srcFile);

//设置上传目录

ftpClient.changeWorkingDirectory(ftpGoalDir);

//向目标服务器写入文件大小限制

ftpClient.setBufferSize(1024);

//

ftpClient.setControlEncoding("GBK");

//设置文件类型（二进制）

ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);

ftpClient.storeFile(renameFileName, fis);

res=true;

System.out.println("upload successful!");

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("FTP客户端出错！", e);

} finally {

IOUtils.closeQuietly(fis);

try {

ftpClient.disconnect();

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("关闭FTP连接发生异常！", e);

}

}

return res;

}

/**

* FTP下载单个文件测试

*/

public static void testDownload(String ip,int port,String userName,String passWord,String ftpGoalDir,String sourceFileUrl,String renameFileName) {

FTPClient ftpClient = new FTPClient();

FileOutputStream fos = null;

try {

ftpClient.connect(ip);

ftpClient.login(userName, passWord);

String remoteFileName = ftpGoalDir;

fos = new FileOutputStream(sourceFileUrl+"/"+renameFileName);

ftpClient.setBufferSize(1024);

//设置文件类型（二进制）

ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);

ftpClient.retrieveFile(remoteFileName, fos);

System.out.println("successful!");

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("FTP客户端出错！", e);

} finally {

IOUtils.closeQuietly(fos);

try {

ftpClient.disconnect();

} catch (IOException e) {

e.printStackTrace();

throw new RuntimeException("关闭FTP连接发生异常！", e);

}

}

}

}

上传多个文件示例后续更新中......敬请关注!