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();}}