FTP远程上传下载文件
最近工作中用到FTP知识，感觉比较好用，代码贴在下面/** * 这个是真正执行FTPUtils任务的 ** @author Administrator **/public class FtpUtils {private String ip = "";private String username = "";private String password = "";private int port = -1;private String path = "";FtpClient ftpClient = null;OutputStream os = null;FileInputStream is = null;public FtpUtils(String serverIP, String username, String password) {this.ip = serverIP;this.username = username;this.password = password;}public FtpUtils(String serverIP, int port, String username, String password) {this.ip = serverIP;this.username = username;this.password = password;this.port = port;}/** * 连接ftp服务器 ** @throws IOException */public boolean connectServer() {ftpClient = new FtpClient();try {if (this.port != -1) {ftpClient.openServer(this.ip, this.port);} else {ftpClient.openServer(this.ip);}ftpClient.login(this.username, this.password);if (this.path.length() != 0) {ftpClient.cd(this.path);// path是ftp服务下主目录的子目录}ftpClient.binary();// 用2进制上传、下载System.out.println("已登录到\"" + ftpClient.pwd() + "\"目录");return true;} catch (IOException e) {e.printStackTrace();return false;}}/** * 断开与ftp服务器连接 ** @throws IOException */public boolean closeServer() {try {if (is != null) {is.close();}if (os != null) {os.close();}if (ftpClient != null) {ftpClient.closeServer();}System.out.println("已从服务器断开");return true;} catch (IOException e) {e.printStackTrace();return false;}}/** * 检查文件夹在当前目录下是否存在 ** @param dir * @return */private boolean isDirExist(String dir) {String pwd = "";try {pwd = ftpClient.pwd();ftpClient.cd(dir);ftpClient.cd(pwd);} catch (Exception e) {return false;}return true;}/** * 在当前目录下创建文件夹 ** @param dir * @return * @throws Exception */private boolean createDir(String dir) {try {ftpClient.ascii();StringTokenizer s = new StringTokenizer(dir, "/"); // signs.countTokens();String pathName = ftpClient.pwd();while (s.hasMoreElements()) {pathName = pathName + "/" + (String) s.nextElement();try {ftpClient.sendServer("MKD " + pathName + "\r\n");} catch (Exception e) {e = null;return false;}ftpClient.readServerResponse();}ftpClient.binary();return true;} catch (IOException e1) {e1.printStackTrace();return false;}}/** * ftp上传 如果服务器段已存在名为filename的文件夹，该文件夹中与要上传的文件夹中同名的文件将被替换 ** @param filename * 要上传的文件（或文件夹）名 * @return * @throws Exception */public boolean upload(String filename) {String newname = "";if (filename.indexOf("/") > -1) {newname = filename.substring(filename.lastIndexOf("/") + 1);} else {newname = filename;}return upload(filename, newname);}/** * ftp上传 如果服务器段已存在名为newName的文件夹，该文件夹中与要上传的文件夹中同名的文件将被替换 ** @param fileName * 要上传的文件（或文件夹）名 * @param newName * 服务器段要生成的文件（或文件夹）名 * @return */public boolean upload(String fileName, String newName) {try {String savefilename = new String(fileName.getBytes("ISO-8859-1"),"GBK");File file_in = new File(savefilename);// 打开本地待长传的文件if (!file_in.exists()) {throw new Exception("此文件或文件夹[" + file_in.getName() + "]有误或不存在!");}if (file_in.isDirectory()) {upload(file_in.getPath(), newName, ftpClient.pwd());} else {uploadFile(file_in.getPath(), newName);}if (is != null) {is.close();}if (os != null) {os.close();}return true;} catch (Exception e) {e.printStackTrace();System.err.println("Exception e in Ftp upload(): " + e.toString());return false;} finally {try {if (is != null) {is.close();}if (os != null) {os.close();}} catch (IOException e) {e.printStackTrace();}}}/** * 真正用于上传的方法 ** @param fileName * @param newName * @param path * @throws Exception */private void upload(String fileName, String newName, String path)throws Exception {String savefilename = new String(fileName.getBytes(), "gbk");File file_in = new File(savefilename);// 打开本地待长传的文件if (!file_in.exists()) {throw new Exception("此文件或文件夹[" + file_in.getName() + "]有误或不存在!");}if (file_in.isDirectory()) {if (!isDirExist(newName)) {createDir(newName);}ftpClient.cd(newName);File sourceFile[] = file_in.listFiles();for (int i = 0; i < sourceFile.length; i++) {if (!sourceFile.exists()) {continue;}if (sourceFile.isDirectory()) {this.upload(sourceFile.getPath(), sourceFile.getName(), path + "/" + newName);} else {this.uploadFile(sourceFile.getPath(), sourceFile.getName());}}} else {uploadFile(file_in.getPath(), newName);}ftpClient.cd(path);}/** * upload 上传文件 ** @param filename * 要上传的文件名 * @param newname * 上传后的新文件名 * @return -1 文件不存在 >=0 成功上传，返回文件的大小 * @throws Exception */public long uploadFile(String filename, String newname) throws Exception {long result = 0;TelnetOutputStream os = null;FileInputStream is = null;try {java.io.File file_in = new java.io.File(filename);if (!file_in.exists())return -1;os = ftpClient.put(newname);result = file_in.length();is = new FileInputStream(file_in);byte[] bytes = new byte;int c;while ((c = is.read(bytes)) != -1) {os.write(bytes, 0, c);}} finally {if (is != null) {is.close();}if (os != null) {os.close();}}return result;}/** * 从ftp下载文件到本地 ** @param filename * 服务器上的文件名 * @param newfilename * 本地生成的文件名 * @return * @throws Exception */public long downloadFile(String filename, String newfilename) {long result = 0;TelnetInputStream is = null;FileOutputStream os = null;try {is = ftpClient.get(filename);java.io.File outfile = new java.io.File(newfilename);os = new FileOutputStream(outfile);byte[] bytes = new byte;int c;while ((c = is.read(bytes)) != -1) {os.write(bytes, 0, c);result = result + c;}} catch (IOException e) {e.printStackTrace();} finally {try {if (is != null) {is.close();}if (os != null) {os.close();}} catch (IOException e) {e.printStackTrace();}}return result;}/** * 取得相对于当前连接目录的某个目录下所有文件列表 ** @param path * @return */public List getFileList(String path) {List list = new ArrayList();DataInputStream dis;try {dis = new DataInputStream(ftpClient.nameList(this.path + path));String filename = "";while ((filename = dis.readLine()) != null) {list.add(filename);}} catch (IOException e) {e.printStackTrace();}return list;}public static void main(String[] args) {FtpUtils ftp = new FtpUtils("144.64.131.304", 21, "user", "user");ftp.connectServer();// 只能上传整个目录中的东西到虚拟目录下的目录try {// ftp.upload("e:/aa.txt", "ftptargetdir/aa.txt","test");// //上传单个文件到单个文件ftp.upload("d:/crmtest", "ftptargetdir", ".");// 上传整个文件夹的内容,中文的好像都传不了，DOS命令下可以} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}// System.out.println(result?"上传成功！":"上传失败！");//// List<File> list = ftp.getFileList("vir_dir");//// for(int i=0;i<list.size();i++){//// System.out.println(list.get(i).getName());//// }ftp.closeServer();/** * FTP远程命令列表 ** USER PORT RETR ALLO DELE SITE XMKD CDUP FEAT ** PASS PASV STOR REST CWD STAT RMD XCUP OPTS ** ACCT TYPE APPE RNFR XCWD HELP XRMD STOU AUTH ** REIN STRU SMNT RNTO LIST NOOP PWD SIZE PBSZ ** QUIT MODE SYST ABOR NLST MKD XPWD MDTM PROT ** 在服务器上执行命令,如果用sendServer来执行远程命令(不能执行本地FTP命令)的话，所有FTP命令都要加上\r\n ** ftpclient.sendServer("XMKD /test/bb\r\n"); //执行服务器上的FTP命令 ** ftpclient.readServerResponse一定要在sendServer后调用 ** nameList("/test")获取指目录下的文件列表 ** XMKD建立目录，当目录存在的情况下再次创建目录时报错 ** XRMD删除目录 ** DELE删除文件 */}}
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