java 实现ftp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;

/**
 *ftp连接管理(使用apache commons-net-1.4.1 lib)
 *@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;
    }


    /**
     * ftp登录
     * @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


    /**
     * ftp上传文件
     * @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


    /**
     *
     * 删除ftp上的文件
     * @author tangw 2010-12-26
     * @param srcFname
     * @return true || alse
     */
    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

    /**
     *销毁ftp连接
     *@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;

/**
 * 使用apache commons-net-1.4.1 实现ftp上传功能
 * @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();

    }

}