apache common-net 学习笔记

相关下载:
commons-net down:http://commons.apache.org/net/download.html

公司提出需要通过ftp上传下载文件,总结一下(备忘)

package cn.xt.net.ftp;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
import org.junit.Test;

public class Ftpclient {
	
	final static String PATH="d:/zhanghuadong/";
	final static String SERVICE_ADDRESS="192.168.0.115";
	final static String USER="ftpuser";
	final static String PASSWORD="ftpuser";
	final static String DOWN_FILE_NAME="XF200070750845720090218";
	/**
	 * Ftp下载
	 *
	 */
	@Test
	public void ftpQuery(){
		FTPClient client=new FTPClient();
		try {
			client.connect(SERVICE_ADDRESS);
			boolean islogon=client.login(USER, PASSWORD);
			FTPFile[] files=null;
			if(islogon){
				int reply=client.getReplyCode();
				/**判断返回代码 */
				if(!FTPReply.isPositiveCompletion(reply)){
					throw new Exception("对不起,"+SERVICE_ADDRESS+" user:"+USER+" password:"+PASSWORD+" 连接出错!");
				}
				/**更改下载的目录 */
				client.changeWorkingDirectory("qyyd_fsend/");
				files=client.listFiles();
				File file=null;
				for (int i = 0; i < files.length; i++) {
					System.out.println(files[i].getName());
					if(files[i].getName().equals("XF200070750845720090218")){
						System.out.println("down...");
						file=new File(PATH+files[i].getName());
					}
				}
				if(file!=null){
					OutputStream out=new FileOutputStream(file);
					client.retrieveFile("XF200070750845720090218", out);
					System.out.println("down success...");
					out.close();
				}
				System.out.println("logon 成功!");
			}
			client.logout();
			client.disconnect();
		} catch (SocketException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch(Exception e){
			e.printStackTrace();
		}
	}
	
	public void ftpUpload(){
		FTPClient ftp=new FTPClient();
		InputStream stream=null;
		try{
			//ftp.setDefaultPort(221);
			ftp.connect(SERVICE_ADDRESS);
			boolean islogon=ftp.login(USER, PASSWORD);
			if(islogon){
				int recode=ftp.getReplyCode();
				if(!FTPReply.isPositiveCompletion(recode)){
					throw new Exception("对不起,"+SERVICE_ADDRESS+" user:"+USER+" password:"+PASSWORD+" 连接出错!");
				}
				stream=new FileInputStream(new File(PATH+DOWN_FILE_NAME));
				FTPFile[] files=ftp.listFiles();
				int overname=0;
				for (int i = 0; i < files.length; i++) {
					if(files[i].getName().indexOf(DOWN_FILE_NAME)!=-1){
						overname++;
					}
				}
				if(overname>0){
					ftp.rename(DOWN_FILE_NAME, DOWN_FILE_NAME+"."+overname);
				}
				//设置文件类型 文本类型 二进制文件 区别文本会根据系统加换行符  二进制则不会
				ftp.setFileType(FTPClient.ASCII_FILE_TYPE);
				boolean isstore=ftp.storeFile(DOWN_FILE_NAME,stream);
				stream.close();
				if(!isstore){
					System.out.println("upload fail ...");
				}
				System.out.println("upload  success...");
			}
		}catch(Exception e){
			e.printStackTrace();
		}finally{
			try {
				ftp.logout();
				ftp.disconnect();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static void main(String[] args){
		Ftpclient client=new Ftpclient();
		client.ftpUpload();
	}
}