java FTP上传文件（进度条显示进度）

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">java实现FTP上传有2种方式，一种是org.apache.commons.net.ftp.FTPClient这个jar包，一种是sun.net.ftp.FtpClient。不知道为什么，在使用前一种方式时，在遇到大批量的上传文件时总会抛出异常，我却找不出原因，所以使用的是后者。</span>

sun的FtpClient就在自带的system library中，如果程序找不到，Remove一下system library，再重新添加一次就好。
这边我套用的是别人封装好的方法进行上传的，只不过稍加修改，再上传之前计算了一下所选文件（夹）的总大小，然后单独开了一个线程每隔一段时间计算总的上传量，然后刷新swing界面UI。这边直接贴上FtpClient封装好后的类的代码:
java实现FTP上传有2种方式，一种是org.apache.commons.net.ftp.FTPClient这个jar包，一种是sun.net.ftp.FtpClient。不知道为什么，在使用前一种方式时，在遇到大批量的上传文件时总会抛出异常，我却找不出原因，所以使用的是后者。

sun的FtpClient就在自带的system library中，如果程序找不到，Remove一下system，再重新添加一遍就好。

下面主要贴上封装好的FtpUtils类的代码：

package com.fisee.ftp;import java.io.DataInputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.ArrayList;import java.util.List;import java.util.StringTokenizer;import sun.net.TelnetInputStream;import sun.net.TelnetOutputStream;import sun.net.ftp.FtpClient;/** * ftp上传，下载 *  * @author why 2009-07-30 *  */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 static long trans = 0;//已传输文件大小public static long totalSize = 0;//文件总大小public FtpUtils(String serverIP, int port, String username, String password) {this.ip = serverIP;this.username = username;this.password = password;this.port = port;trans = 0;}/** * 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");*/String savefilename = fileName;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("ISO-8859-1"), "GBK");String savefilename = fileName;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[i].exists()) {continue;}if (sourceFile[i].isDirectory()) {this.upload(sourceFile[i].getPath(),sourceFile[i].getName(), path + "/" + newName);} else {this.uploadFile(sourceFile[i].getPath(),sourceFile[i].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[1024];int c;while ((c = is.read(bytes)) != -1) {os.write(bytes, 0, c);trans = trans + 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[1024];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("192.168.1.100", 8833, "ScumVirus","123456");ftp.connectServer();boolean result = ftp.upload("E:/11game", "");System.out.println(result ? "上传成功！" : "上传失败！");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 */}}

刷新进度条线程：

//刷新进度条线程class ProgressThread extends Thread {private JProgressBar progressBar;public ProgressThread(JProgressBar progressBar) {this.progressBar = progressBar;}public void run() {while (flag) {int k = (int) (FtpUtils.trans * 100 / FtpUtils.totalSize);progress.setValue(k);try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}}

界面效果图

附上源码：点击下载