Java实现FTP上传下载功能

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; 

/** 
* Apache commons-net 试用一把，看看FTP客户端工具做的好用不 
* 
* @author : leizhimin，2008-8-20 14:00:38。<p> 
*/ 
public  class FtpTest { 
     public  static  void main(String[] args) { 
        testUpload(); 
        testDownload(); 
    } 

     /** 
     * FTP上传单个文件测试 
     */ 
     public  static  void testUpload() { 
        FTPClient ftpClient =  new FTPClient(); 
        FileInputStream fis =  null; 

         try { 
            ftpClient.connect( "192.168.14.117"); 
            ftpClient.login( "admin",  "123"); 

            File srcFile =  new File( "C:\\new.gif"); 
            fis =  new FileInputStream(srcFile); 
             //设置上传目录 
            ftpClient.changeWorkingDirectory( "/admin/pic"); 
            ftpClient.setBufferSize(1024); 
            ftpClient.setControlEncoding( "GBK"); 
             //设置文件类型（二进制） 
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); 
            ftpClient.storeFile( "3.gif", fis); 
        }  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); 
            } 
        } 
    } 

     /** 
     * FTP下载单个文件测试 
     */ 
     public  static  void testDownload() { 
        FTPClient ftpClient =  new FTPClient(); 
        FileOutputStream fos =  null; 

         try { 
            ftpClient.connect( "192.168.14.117"); 
            ftpClient.login( "admin",  "123"); 

            String remoteFileName =  "/admin/pic/3.gif"; 
            fos =  new FileOutputStream( "c:/down.gif"); 

            ftpClient.setBufferSize(1024); 
             //设置文件类型（二进制） 
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); 
            ftpClient.retrieveFile(remoteFileName, fos); 
        }  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); 
            } 
        } 
    } 
}