java实现上传和下载工具类

本文实例为大家分享了文件上传到ftp服务工具类，供大家参考，具体内容如下

直接引用此java工具类就好

import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import org.apache.commons.net.ftp.FTP;import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPFile;import org.apache.commons.net.ftp.FTPReply;public class FtpUtil {     public static boolean uploadFile(String host, int port, String username, String passWord, String basePath,      String filePath, String filename, InputStream input) {    boolean result = false;    FTPClient ftp = new FTPClient();    try {      int reply;      ftp.connect(host, port);// 连接FTP服务器      // 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器      ftp.login(username, password);// 登录      reply = ftp.getReplyCode();      if (!FTPReply.isPositiveCompletion(reply)) {        ftp.disconnect();        return result;      }      //切换到上传目录      if (!ftp.changeWorkingDirectory(basePath+filePath)) {        //如果目录不存在创建目录        String[] dirs = filePath.split("/");        String tempPath = basePath;        for (String dir : dirs) {          if (null == dir || "".equals(dir)) continue;          tempPath += "/" + dir;          if (!ftp.changeWorkingDirectory(tempPath)) {            if (!ftp.makeDirectory(tempPath)) {              return result;            } else {              ftp.changeWorkingDirectory(tempPath);            }          }        }      }      //设置上传文件的类型为二进制类型      ftp.setFileType(FTP.BINARY_FILE_TYPE);      //上传文件      if (!ftp.storeFile(filename, input)) {        return result;      }      input.close();      ftp.loGout();      result = true;    } catch (IOException e) {      e.printStackTrace();    } finally {      if (ftp.isConnected()) {        try {          ftp.disconnect();        } catch (IOException ioe) {        }      }    }    return result;  }       public static boolean downloadFile(String host, int port, String username, String password, String remotePath,      String fileName, String localPath) {    boolean result = false;    FTPClient ftp = new FTPClient();    try {      int reply;      ftp.connect(host, port);      // 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器      ftp.login(username, password);// 登录      reply = ftp.getReplyCode();      if (!FTPReply.isPositiveCompletion(reply)) {        ftp.disconnect();        return result;      }      ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录      FTPFile[] fs = ftp.listFiles();      for (FTPFile ff : fs) {        if (ff.getName().equals(fileName)) {          File localFile = new File(localPath + "/" + ff.getName());          OutputStream is = new FileOutputStream(localFile);          ftp.retrieveFile(ff.getName(), is);          is.close();        }      }      ftp.logout();      result = true;    } catch (IOException e) {      e.printStackTrace();    } finally {      if (ftp.isConnected()) {        try {          ftp.disconnect();        } catch (IOException ioe) {        }      }    }    return result;  }    public static void main(String[] args) {    try {       FileInputStream in=new FileInputStream(new File("D:\\temp\\image\\gaigeming.jpg"));       boolean flag = uploadFile("192.168.25.133", 21, "ftpuser", "ftpuser", "/home/ftpuser/www/images","/2015/01/21", "gaigeming.jpg", in);       System.out.println(flag);     } catch (FileNotFoundException e) {       e.printStackTrace();     }   }}