FTP服务端文件下载到本地

import java.awt.image.BufferedImage;import java.io.File;    import java.io.FileNotFoundException;    import java.io.FileOutputStream;    import java.io.IOException;    import java.io.OutputStream;    import java.net.SocketException;    import java.util.Properties;  import javax.imageio.ImageIO;import org.apache.commons.net.ftp.*; import org.apache.pdfbox.pdmodel.PDDocument;import org.apache.pdfbox.rendering.PDFRenderer;public class DownloadFile {    /**      * 获取FTPClient对象      *      * @param ftpHost      *            FTP主机服务器      * @param ftpPassword      *            FTP 登录密码      * @param ftpUserName      *            FTP登录用户名      * @param ftpPort      *            FTP端口 默认为21      * @return      */      public static FTPClient getFTPClient(String ftpHost, String ftpUserName,              String ftpPassword, int ftpPort) {          FTPClient ftpClient = new FTPClient();          try {              ftpClient = new FTPClient();              ftpClient.connect(ftpHost, ftpPort);// 连接FTP服务器              ftpClient.login(ftpUserName, ftpPassword);// 登陆FTP服务器              if (!FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) {                  System.out.println("未连接到FTP，用户名或密码错误。");                  ftpClient.disconnect();              } else {                  System.out.println("FTP连接成功。");              }          } catch (SocketException e) {              e.printStackTrace();              System.out.println("FTP的IP地址可能错误，请正确配置。");          } catch (IOException e) {              e.printStackTrace();              System.out.println("FTP的端口错误,请正确配置。");          }          return ftpClient;      }      /*      * 从FTP服务器下载文件      *       * @param ftpHost FTP IP地址      *       * @param ftpUserName FTP 用户名      *       * @param ftpPassword FTP用户名密码      *       * @param ftpPort FTP端口      *       * @param ftpPath FTP服务器中文件所在路径 格式： ftptest/aa      *       * @param localPath 下载到本地的位置 格式：H:/download      *       * @param fileName 文件名称      */      public static void downloadFtpFile(String ftpHost, String ftpUserName,              String ftpPassword, int ftpPort, String ftpPath, String localPath,              String fileName) {          FTPClient ftpClient = null;          try {              ftpClient = getFTPClient(ftpHost, ftpUserName, ftpPassword, ftpPort);              ftpClient.setControlEncoding("iso-8859-1"); // 中文支持              ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);              ftpClient.enterLocalPassiveMode();              ftpClient.changeWorkingDirectory(ftpPath);              FTPFile[] fs = ftpClient.listFiles();              for(FTPFile ff:fs){              System.out.println(ff.getName() );                        }             File localFile = new File(localPath + File.separatorChar + fileName);             OutputStream os = new FileOutputStream(localFile);            if(ftpClient.retrieveFile(new String(fileName.getBytes(),"iso-8859-1") , os))            System.out.println("YES");            os.close();            ftpClient.logout();          } catch (FileNotFoundException e) {              System.out.println("没有找到" + ftpPath + "文件");              e.printStackTrace();          } catch (SocketException e) {              System.out.println("连接FTP失败.");              e.printStackTrace();          } catch (IOException e) {              e.printStackTrace();              System.out.println("文件读取错误。");              e.printStackTrace();          }      }  }

mian类

import java.io.File;import java.io.UnsupportedEncodingException;public class Main {    /**     * @param args     */    public static void main(String[] args) {        // TODO Auto-generated method stub        String ftpHost = "172.22.224.168";          String ftpUserName = "ieqpadm";          String ftpPassword = "ieqpadm123";          int ftpPort = 21;          String ftpPath = "/home/ieqpadm/data/test/chenyltest";          String localPath = "D:";          String  fileName="EQP-信息系统情况汇总-IEM系统 (3).pdf";               DownloadFile.downloadFtpFile(ftpHost, ftpUserName, ftpPassword, ftpPort, ftpPath, localPath, fileName);              }}

下载文件时，出现中文文件查找不到的问题。主要是因为ftp协议中文件名编码方式是”iso-8859-1”，文件名需要转码后去查找。new String(fileName.getBytes(),”iso-8859-1”)