[java] java 实现FTP服务器文件的上传和下载

利用Apache commons-net 实现；

package com.xwolf.driver.util;

import com.xwolf.driver.exception.RunException;
import org.apache.commons.net.ftp.FTPClient;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.charset.Charset;

/**
 * Created by Administrator on 2015/9/18.
 */
public class FtpUtil {
    //用户名
    private static final  String username ="root";
    //密码
    private static final  String pwd ="root1234";
    //主机
    private static  final String host ="127.0.0.1";
    //端口
    private static final  int port =21;
  /*
  *上传文件到ftp
  * */
    public static  void upload(FTPClient ftpClient) throws RunException {

        File file = new File("C:\\Users\\Administrator\\Desktop\\document\\派单OSS报文.xml");
        try {
            FileInputStream fis = new FileInputStream(file);
            //设置FTP文件目录
            ftpClient.changeWorkingDirectory("/weblogic/upload");
            //缓冲区
            ftpClient.setBufferSize(1024);
            //字符集 貌似用途不大
            ftpClient.setControlEncoding("GBK");
            ftpClient.setCharset(Charset.forName("GBK"));
            //文件类型（二进制文件）
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            //保存文件到FTP服务器上 防止中文乱码
            ftpClient.storeFile(new String("派单OSS报文_0921.xml".getBytes("GBK"),"iso-8859-1"),fis);
        } catch (Exception e) {
            throw new RunException("文件上传ftp服务器异常",e);
        }
    }

    /**
     * 下载文件
     * @param ftpClient
     */
    public static void download(FTPClient ftpClient) throws RunException {
        try {
            //保存的文件的名称
            FileOutputStream ous = new FileOutputStream(new File("E:\\派单报文.xml"));
            ftpClient.setBufferSize(1024);
            //设置文件类型（二进制）
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            //服务器上文件名称
            ftpClient.retrieveFile("派单OSS报文_0921.xml",ous);
        } catch (Exception e) {
            throw new RunException("文件上传ftp服务器异常",e);
        }
    }
    public static void main(String[] args) throws RunException {

        FTPClient ftpClient=new FTPClient();

        try {
            //连接FTP
            ftpClient.connect(host,port);
           //是否登录成功
           boolean login = ftpClient.login(username,pwd);
        if(login){
            download(ftpClient);
         }

        } catch (Exception e) {
            throw new RunException("ftp服务器连接异常",e);
        }

    }

}