利用commons-net包实现ftp上传下载例子

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下载文件的时候注意一下，第一个参数要用iso-8859_1编码的，否则文件大小等于0！

直接贴图代码了：

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package ftp2;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.net.SocketException;import org.apache.commons.io.FileUtils;import org.apache.commons.io.IOUtils;import org.apache.commons.net.ftp.FTPClient;import org.apache.commons.net.ftp.FTPClientConfig;import org.apache.commons.net.ftp.FTPFile;import org.apache.commons.net.ftp.FTPReply;/** * 使用commons的net包进行ftp链接. 相关包：commons-net-1.4.1.jar ; * commons-io-1.2.jar;jakarta-oro-2.0.8.jar测试通过.可以列出ftp上的文件 * 通过把ftp服务器上的文件流连接到outSteam及可以把文件下载到本机的目录..限制如果目录为中文则需要处理.最好使用英文文件名 *  */public class ListFtpFile {private FTPClient ftpClient = new FTPClient();private OutputStream outSteam = null;/** * ftp服务器地址 */private String hostName = "192.168.0.2";private int port = 212;/** * 登录名 */private String userName = "anonymous";//匿名登录/** * 登录密码 */private String password = "121@hotmail.com";//随便一个地址/** * 需要访问的远程目录 */private String remoteDir = "/software/dreamweaver/";/** * 下载 */private void download() {try {// 链接到ftp服务器ftpClient.connect(hostName,port);System.out.println("连接到ftp服务器：" + hostName + " 成功..开始登录");// 登录.用户名 密码boolean b = ftpClient.login(userName, password);System.out.println("登录成功." + b);//检测连接是否成功int reply = ftpClient.getReplyCode();if(!FTPReply.isPositiveCompletion(reply)) {ftpClient.disconnect();System.err.println("FTP server refused connection.");System.exit(1);}ftpClient.setControlEncoding("GBK");FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);  conf.setServerLanguageCode("zh"); FTPFile[] remoteFiles = ftpClient.listFiles(remoteDir);if (remoteFiles != null) {for (int i = 0; i < remoteFiles.length; i++) {String name = remoteFiles[i].getName();//下载File localFile = new File("c:/001/ftp/" + name);OutputStream is = new FileOutputStream(localFile);//retrieveFile的第一个参数需要是 ISO-8859-1 编码,并且必须是完整路径！String fileName = remoteDir + name;ftpClient.retrieveFile(new String(fileName.getBytes("GBK"),"ISO-8859-1"), is);is.close();//打印long length = remoteFiles[i].getSize();String readableLength = FileUtils.byteCountToDisplaySize(length);System.out.println(name + ":\t"+remoteFiles[i].isFile()+"\t" + readableLength);}}ftpClient.logout();} catch (Exception e) {e.printStackTrace();} finally {IOUtils.closeQuietly(outSteam);try {ftpClient.disconnect();} catch (IOException ioe) {ioe.printStackTrace();}}}/** * 上传 * */public void upload(){String srcUrl = "C:/001/菜单权限设计.doc";String targetFileName = "菜单权限设计.doc";try {ftpClient.connect(hostName,port);boolean b = ftpClient.login(userName, password);// 检测连接是否成功int reply = ftpClient.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftpClient.disconnect();System.err.println("FTP server refused connection.");System.exit(1);}ftpClient.setControlEncoding("GBK");FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);  conf.setServerLanguageCode("zh"); File srcFile = new File(srcUrl);FileInputStream fis = null;fis = new FileInputStream(srcFile);// 设置上传目录ftpClient.changeWorkingDirectory(remoteDir);ftpClient.setBufferSize(1024);ftpClient.setControlEncoding("GBK");// 设置文件类型（二进制）ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);// 上传b = ftpClient.storeFile(targetFileName, fis);IOUtils.closeQuietly(fis);/*boolean bool = ftpClient.changeWorkingDirectory("/NC");System.out.println("changeWorkingDirectory="+bool);bool = ftpClient.makeDirectory("/NC");System.out.println("makeDirectory="+bool);*/ftpClient.logout();} catch (SocketException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally{try {ftpClient.disconnect();} catch (IOException e) {e.printStackTrace();}}}/** * 测试 * */public static void main(String[] args) {ListFtpFile listFtpfiles = new ListFtpFile();listFtpfiles.download();listFtpfiles.upload();}}

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