ftp上传与下载

package com.demo.ftp;

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

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPReply;

/**
 * help:http://commons.apache.org/proper/commons-net/apidocs/org/apache/commons/net/ftp/FTPClient.html
 * @author
 *
 */
public class FtpUtils {

    private FTPClient ftpClient;
    
    private boolean connectServer(String path,String url,int port,String username,String password){
        boolean result = false;
        ftpClient = new FTPClient();
        int reply ;
        try {
            //如果采用默认端口，可以使用ftp.connect(url)的方式直接连接FTP服务器 
            ftpClient.connect(url, port);
            // 下面三行代码必须要，而且不能改变编码格式，否则不能正确下载中文文件    
            ftpClient.setControlEncoding("UTF-8");
            FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
            conf.setServerLanguageCode("zh");
            //登录ftp
            ftpClient.login(username, password);
            ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
            
            // 看返回的值是不是230，如果是，表示登陆成功    
            reply = ftpClient.getReplyCode();
            
             // 以2开头的返回值就会为真    
            if(!FTPReply.isPositiveCompletion(reply)){
                ftpClient.disconnect();
                System.out.println(">>>>>>>>>>>>>>>>连接服务器失败!"); 
                result = false;
            }else{
                ftpClient.changeWorkingDirectory(path);
                result = true;
            }
        } catch (SocketException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }
    
    
    private void uploadFile(File file){
        if(file.isDirectory()){
            try {
                ftpClient.makeDirectory(file.getName());
                ftpClient.changeWorkingDirectory(file.getName());  
                String[] files = file.list();  
                for (int i = 0; i < files.length; i++) {  
                    File file1 = new File(file.getPath() + "\\" + files[i]);  
                    if (file1.isDirectory()) {  
                        uploadFile(file1);  
                        ftpClient.changeToParentDirectory();  
                    } else {  
                        File file2 = new File(file.getPath() + "\\" + files[i]);  
                        FileInputStream input = new FileInputStream(file2);  
                        ftpClient.storeFile(file2.getName(), input);  
                        input.close();  
                    }  
                }  
            } catch (IOException e) {
                e.printStackTrace();
            }
            
        }else{
            File file2 = new File(file.getPath());  
            FileInputStream input;
            try {
                input = new FileInputStream(file2);
                 ftpClient.storeFile(file2.getName(), input);  
                 input.close();  
            } catch (Exception e) {
                e.printStackTrace();
            }  
           
        }
    }
    
    //下载  
    public void downLoad(String ftpFile, String dstFile) throws IOException {  
        File file = new File(dstFile);  
        FileOutputStream fos = new FileOutputStream(file);  
        ftpClient.retrieveFile(ftpFile, fos);  
        fos.close();  
    }  
    
    public static void main(String[] args) throws Exception {  
        FtpUtils t = new FtpUtils();  
        t.connectServer("", "测试ip", 21, "用户名", "密码");  
        File file = new File("F:\\test\\file\\file.txt");  
//        t.uploadFile(file);  
        t.downLoad("file.txt", "F:\\test\\file\\file5.txt");
    }  
    
}