Java FTP上传下载删除功能实例代码

在没给大家上完整代码之前先给大家说下注意点：

 FTP上传下载,容易出现乱码，记得转换

package com.yinhai.team.action;
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 org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;
public class FavFTPUtil {
   
   public static boolean uploadFile(String hostname, int port, String username, String password, String pathname, String fileName, InputStream inputStream){
    boolean flag = false;
    FTPClient ftpClient = new FTPClient();
    ftpClient.setControlEncoding("UTF-8");
    try {
     //连接FTP服务器
     ftpClient.connect(hostname, port);
     //登录FTP服务器
     ftpClient.login(username, password);
     //是否成功登录FTP服务器
     int replyCode = ftpClient.getReplyCode();
     if(!FTPReply.isPositiveCompletion(replyCode)){
      return flag;
     }
     ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
     ftpClient.makeDirectory(pathname);
     ftpClient.changeWorkingDirectory(pathname);
     ftpClient.storeFile(fileName, inputStream);
     inputStream.close();
     ftpClient.logout();
     flag = true;
    } catch (Exception e) {
     e.printStackTrace();
    } finally{
     if(ftpClient.isConnected()){
      try {
ftpClient.disconnect();
      } catch (IOException e) {
e.printStackTrace();
      }
     }
    }
    return flag;
   }
   
   public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String filename, String originfilename){
    boolean flag = false;
    try {
     InputStream inputStream = new FileInputStream(new File(originfilename));
     flag = uploadFile(hostname, port, username, password, pathname, filename, inputStream);
    } catch (Exception e) {
     e.printStackTrace();
    }
    return flag;
   }
   
   public static boolean uploadFileFromProduction(String hostname, int port, String username, String password, String pathname, String originfilename){
    boolean flag = false;
    try {
     String fileName = new File(originfilename).getName();
     InputStream inputStream = new FileInputStream(new File(originfilename));
     flag = uploadFile(hostname, port, username, password, pathname, fileName, inputStream);
    } catch (Exception e) {
     e.printStackTrace();
    }
    return flag;
   }
   
   public static boolean deleteFile(String hostname, int port, String username, String password, String pathname, String filename){
    boolean flag = false;
    FTPClient ftpClient = new FTPClient();
    try {
     //连接FTP服务器
     ftpClient.connect(hostname, port);
     //登录FTP服务器
     ftpClient.login(username, password);
     //验证FTP服务器是否登录成功
     int replyCode = ftpClient.getReplyCode();
     if(!FTPReply.isPositiveCompletion(replyCode)){
      return flag;
     }
     //切换FTP目录
     ftpClient.changeWorkingDirectory(pathname);
     ftpClient.dele(filename);
     ftpClient.logout();
     flag = true;
    } catch (Exception e) {
     e.printStackTrace();
    } finally{
     if(ftpClient.isConnected()){
      try {
ftpClient.logout();
      } catch (IOException e) {
      }
     }
    }
    return flag;
   }
   
  public static boolean downloadFile(String hostname, int port, String username, String password, String pathname, String filename, String localpath){
    boolean flag = false;
    FTPClient ftpClient = new FTPClient();
    try {
     //连接FTP服务器
     ftpClient.connect(hostname, port);
     //登录FTP服务器
     ftpClient.login(username, password);
     //验证FTP服务器是否登录成功
     int replyCode = ftpClient.getReplyCode();
     if(!FTPReply.isPositiveCompletion(replyCode)){
      return flag;
     }
     //切换FTP目录
     boolean b = ftpClient.changeWorkingDirectory(new String(pathname.getBytes(),"ISO-8859-1"));
     System.out.println(b);
     FTPFile[] ftpFiles = ftpClient.listFiles();
     for(FTPFile file : ftpFiles){
String fName = new String(file.getName().getBytes("iso-8859-1"), "UTF-8");
System.out.println(fName);
      if(filename.equalsIgnoreCase(fName)){
File localFile = new File(localpath + "/" + fName);
OutputStream os = new FileOutputStream(localFile);
ftpClient.retrieveFile(file.getName(), os);
os.close();
      }
     }
     ftpClient.logout();
     flag = true;
    } catch (Exception e) {
     e.printStackTrace();
    } finally{
     if(ftpClient.isConnected()){
      try {
ftpClient.logout();
      } catch (IOException e) {
      }
     }
    }
    return flag;
   }
}

以上所述是小编给大家介绍的Java FTP上传下载删除功能实例代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对考高分网网站的支持！