本文为引用：[url=http://www.cnblogs.com/tt_mc/archive/2010/03/22/1691708.html]http://www.cnblogs.com/tt_mc/archive/2010/03/22/1691708.html[/url] -------------------- 利用org.apache.commons.net.ftp包实现一个简单的ftp客户端实用类。主要实现一下功能 1.支持上传下载。支持断点续传 2.支持进度汇报 3.支持对于中文目录及中文文件创建的支持。 Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.PrintWriter; import java.io.RandomAccessFile; import open.mis.data.DownloadStatus; import open.mis.data.UploadStatus; import org.apache.commons.net.PrintCommandListener; 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; /** *//** * 支持断点续传的FTP实用类 * @author BenZhou [url=http://www.bt285.cn/]http://www.bt285.cn[/url] * @version 0.1 实现基本断点上传下载 * @version 0.2 实现上传下载进度汇报 * @version 0.3 实现中文目录创建及中文文件创建，添加对于中文的支持 */ public class ContinueFTP { public FTPClient ftpClient = new FTPClient(); public ContinueFTP(){ //设置将过程中使用到的命令输出到控制台 this.ftpClient.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out))); } /** *//** * 连接到FTP服务器 * @param hostname 主机名 * @param port 端口 * @param username 用户名 * @param password 密码 * @return 是否连接成功 * @throws IOException */ public boolean connect(String hostname,int port,String username,String password) throws IOException{ ftpClient.connect(hostname, port); ftpClient.setControlEncoding("GBK"); if(FTPReply.isPositiveCompletion(ftpClient.getReplyCode())){ if(ftpClient.login(username, password)){ return true; } } disconnect(); return false; } /** *//** * 从FTP服务器上下载文件,支持断点续传，上传百分比汇报 * @param remote 远程文件路径 * @param local 本地文件路径 * @return 上传的状态 * @throws IOException */ public DownloadStatus download(String remote,String local) throws IOException{ //设置被动模式 ftpClient.enterLocalPassiveMode(); //设置以二进制方式传输 ftpClient.setFileType([url=ftp://ftp.binary_file_type/]FTP.BINARY_FILE_TYPE[/url]); DownloadStatus result; //检查远程文件是否存在 FTPFile[] files = ftpClient.listFiles(new String(remote.getBytes("GBK"),"iso-8859-1")); if(files.length != 1){ System.out.println("远程文件不存在"); return DownloadStatus.Remote_File_Noexist; } long lRemoteSize = files[0].getSize(); File f = new File(local); //本地存在文件，进行断点下载 if(f.exists()){ long localSize = f.length(); //判断本地文件大小是否大于远程文件大小 if(localSize >= lRemoteSize){ System.out.println("本地文件大于远程文件，下载中止"); return DownloadStatus.Local_Bigger_Remote; } //进行断点续传，并记录状态 FileOutputStream out = new FileOutputStream(f,true); ftpClient.setRestartOffset(localSize); InputStream in = ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1")); byte[] bytes = new byte[1024]; long step = lRemoteSize /100; long process=localSize /step; int c; while((c = in.read(bytes))!= -1){ out.write(bytes,0,c); localSize+=c; long nowProcess = localSize /step; if(nowProcess > process){ process = nowProcess; if(process % 10 == 0) System.out.println("下载进度："+process); //TODO 更新文件下载进度,值存放在process变量中 } } in.close(); out.close(); boolean isDo = ftpClient.completePendingCommand(); if(isDo){ result = DownloadStatus.Download_From_Break_Success; }else { result = DownloadStatus.Download_From_Break_Failed; } }else { OutputStream out = new FileOutputStream(f); InputStream in= ftpClient.retrieveFileStream(new String(remote.getBytes("GBK"),"iso-8859-1")); byte[] bytes = new byte[1024]; long step = lRemoteSize /100; long process=0; long localSize = 0L; int c; while((c = in.read(bytes))!= -1){ out.write(bytes, 0, c); localSize+=c; long nowProcess = localSize /step; if(nowProcess > process){ process = nowProcess; if(process % 10 == 0) System.out.println("下载进度："+process); //TODO 更新文件下载进度,值存放在process变量中 } } in.close(); out.close(); boolean upNewStatus = ftpClient.comp