java ftp实现文件上传和删除

package com.tw.ftp; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import org.apache.commons.io.IOUtils; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPReply; /** *<p>ftp连接管理(使用apache commons-net-1.4.1 lib)</p> *@author tangw 2010-12-26 * */ public class FtpConManager { private static FtpConManager instance; private FTPClient ftpClient =null; /** * get FtpConManager * @return FtpConManager */ public synchronized static FtpConManager getInstance(){ if( instance == null ){ instance = new FtpConManager(); } return instance; } /** * <p>ftp登录</p> * @param s_url ftp服务地址 * @param uname 用户名 * @param pass 密码 */ public void login(String s_url,String uname,String pass){ ftpClient = new FTPClient(); try{ //连接 ftpClient.connect(s_url); ftpClient.login(uname,pass); //检测连接是否成功 int reply = ftpClient.getReplyCode(); if(!FTPReply.isPositiveCompletion(reply)) { this.closeCon(); System.err.println("FTP server refused connection."); System.exit(1); } }catch(Exception ex){ ex.printStackTrace(); //关闭 this.closeCon(); } }//end method login /** * <p>ftp上传文件</p> * @author tangw 2010-12-26 * @param srcUrl 须上传文件 * @param targetFname 生成目标文件 * @return true||false */ public boolean uploadFile(String srcUrl,String targetFname){ boolean flag = false; if( ftpClient!=null ){ File srcFile = new File(srcUrl); FileInputStream fis = null; try { fis = new FileInputStream(srcFile); //设置上传目录 ftpClient.changeWorkingDirectory("/ImData/"); ftpClient.setBufferSize(1024); ftpClient.setControlEncoding("GBK"); //设置文件类型（二进制） ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); //上传 flag = ftpClient.storeFile(targetFname, fis); } catch (Exception e) { e.printStackTrace(); this.closeCon(); }finally{ IOUtils.closeQuietly(fis); } } return flag; }//end method uploadFile /** * * <p>删除ftp上的文件</p> * @author tangw 2010-12-26 * @param srcFname * @return true || false */ public boolean removeFile(String srcFname){ boolean flag = false; if( ftpClient!=null ){ try { flag = ftpClient.deleteFile(srcFname); } catch (IOException e) { e.printStackTrace(); this.closeCon(); } } return flag; }//end method removeFile /** *<p>销毁ftp连接</p> *@author tangw 2010-12-26 */ public void closeCon(){ if(ftpClient !=null){ if(ftpClient.isConnected()){ try { ftpClient.logout(); ftpClient.disconnect(); } catch (IOException e) { e.printStackTrace(); } } } }//end method closeCon }

package com.tw.ftp; /** * <p>使用apache commons-net-1.4.1 实现ftp上传功能</p> * @author tangw 2010-12-26 * */ public class FtpNetTest { /** * @param args */ public static void main(String[] args) { FtpConManager.getInstance().login("ftp服务地址", "登陆名", "密码"); //boolean flag = FtpConManager.getInstance().uploadFile("d://use_1.zip", "3.zip"); boolean flag = FtpConManager.getInstance().removeFile("/ImData/3.zip"); System.out.println("flag:"+flag); //FtpConManager.getInstance().closeCon(); } }