struts2 上传文件 FtpClient ftp操作

网上很多介绍struts2 上传文件的例子，但很多都忘记了说明要加上拦截器fileUploadStack,否则得到的file将会是空的，以下是项目中用到的代码，同时涉及到ftp操作

Action类

<textarea cols="50" rows="15" name="code" class="java">/** * ViewAction.java * com.sword.actions * * Function： TODO * * ver date author * ────────────────────────────────── * 2010-7-1 lidl * * Copyright (c) 2010, TNT All Rights Reserved. */ package com.sword.actions; import java.io.File; import java.io.IOException; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Random; import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext; import org.apache.struts2.convention.annotation.Action; import org.apache.struts2.convention.annotation.InterceptorRef; import com.opensymphony.xwork2.ActionSupport; import com.sword.util.FtpUtil; import com.webservice.SingleMap; /** * ClassName:ViewAction * Function: TODO ADD FUNCTION * Reason: TODO ADD REASON * * @author lidl * @version * @since Ver 1.1 * @Date 2010-7-1 下午05:54:31 * * @see */ public class ViewAction extends ActionSupport{ private int validateNum; private File attachment; private String attachmentFileName; private String attachmentContentType; @Action(interceptorRefs=@InterceptorRef(&quot;fileUploadStack&quot;)) public String execute(){ SingleMap map = SingleMap.getInstance(); int num_int=((Integer)map.map.get(&quot;login&quot;)).intValue(); System.out.println(&quot;num_int:&quot;+num_int+&quot;,validateNum:&quot;+validateNum+&quot;-&gt;&quot;+(num_int==validateNum)); System.out.println(&quot;size：&quot; + map.map.size()); map.map.remove(&quot;login&quot;); if(num_int==validateNum){ System.out.println(attachment == null); String targetDirectory = ServletActionContext.getServletContext() .getRealPath(&quot;/temp&quot;); String targetFileName = generateFileName(attachmentFileName); File target = new File(targetDirectory, targetFileName); targetDirectory+=&quot;/&quot;+targetFileName; try { FileUtils.copyFile(attachment, target); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ System.out.println(targetDirectory); FtpUtil ftp=new FtpUtil(); try { ftp.connectServer(&quot;192.168.32.130&quot;, &quot;lidl&quot;, &quot;aall&quot;, &quot;/ftp&quot;); System.out.println(&quot;filesize:&quot; + ftp.upload(targetDirectory) + &quot;字节&quot;); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ try { ftp.closeServer(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } return &quot;success&quot;; }else{ return &quot;error&quot;; } } private String generateFileName(String fileName) { DateFormat format = new SimpleDateFormat(&quot;yyMMddHHmmss&quot;); String formatDate = format.format(new Date()); int random = new Random().nextInt(10000); int position = fileName.lastIndexOf(&quot;.&quot;); String extension = fileName.substring(position); return formatDate + random + extension; } public int getValidateNum() { return validateNum; } public void setValidateNum(int validateNum) { this.validateNum = validateNum; } public File getAttachment() { return attachment; } public void setAttachment(File attachment) { this.attachment = attachment; } public String getAttachmentFileName() { return attachmentFileName; } public void setAttachmentFileName(String attachmentFileName) { this.attachmentFileName = attachmentFileName; } public String getAttachmentContentType() { return attachmentContentType; } public void setAttachmentContentType(String attachmentContentType) { this.attachmentContentType = attachmentContentType; } } </textarea>

（文件上传 ，请在struts.xml里配上  <constant name="struts.multipart.saveDir" value="/tmp"/> 用来保存临时文件，同时为了 让系统清除临时文件 请在web.xml里配上 ）

web.xml

<textarea cols="50" rows="15" name="code" class="java"> &lt;filter&gt; &lt;filter-name&gt;struts-cleanup&lt;/filter-name&gt; &lt;filter-class&gt;org.apache.struts2.dispatcher.ActionContextCleanUp&lt;/filter-class&gt; &lt;/filter&gt; &lt;filter&gt; &lt;filter-name&gt;struts2&lt;/filter-name&gt; &lt;filter-class&gt; com.sword.actions.FilterDispetor &lt;/filter-class&gt; &lt;/filter&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;struts-cleanup&lt;/filter-name&gt; &lt;url-pattern&gt;/*&lt;/url-pattern&gt; &lt;/filter-mapping&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;struts2&lt;/filter-name&gt; &lt;url-pattern&gt;/*&lt;/url-pattern&gt; &lt;/filter-mapping&gt;</textarea>

 

ftp 操作类

<textarea cols="50" rows="15" name="code" class="java">package com.sword.util; import java.io.DataInputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import java.util.List; import sun.net.TelnetInputStream; import sun.net.TelnetOutputStream; import sun.net.ftp.FtpClient; public class FtpUtil { private FtpClient ftpClient; /** * connectServer 连接ftp服务器 * * @throws java.io.IOException * @param path * 文件夹，空代表根目录 * @param password * 密码 * @param user * 登陆用户 * @param server * 服务器地址 */ public void connectServer(String server, String user, String password, String path) throws IOException { // server：FTP服务器的IP地址；user:登录FTP服务器的用户名 // password：登录FTP服务器的用户名的口令；path：FTP服务器上的路径 ftpClient = new FtpClient(); ftpClient.openServer(server); ftpClient.login(user, password); // path是ftp服务下主目录的子目录 if (path.length() != 0) ftpClient.cd(path); // 用2进制上传、下载 ftpClient.binary(); } /** * upload 上传文件 * * @throws java.lang.Exception * @return -1 文件不存在 -2 文件内容为空 &gt;0 成功上传，返回文件的大小 * @param newname * 上传后的新文件名 * @param filename * 上传的文件 */ public long upload(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; if (file_in.length() == 0) return -2; 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); } } finally { if (is != null) { is.close(); } if (os != null) { os.close(); } } return result; } /** * upload * * @throws java.lang.Exception * @return * @param filename */ public long upload(String filename) throws Exception { String newname = &quot;&quot;; if (filename.indexOf(&quot;/&quot;) &gt; -1) { newname = filename.substring(filename.lastIndexOf(&quot;/&quot;) + 1); } else { newname = filename; } return upload(filename, newname); } /** * download 从ftp下载文件到本地 * * @throws java.lang.Exception * @return * @param newfilename * 本地生成的文件名 * @param filename * 服务器上的文件名 */ public long download(String filename, String newfilename) throws Exception { 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 { if (is != null) { is.close(); } if (os != null) { os.close(); } } return result; } /** * 取得某个目录下的所有文件列表 * */ public List getFileList(String path) { List list = new ArrayList(); try { DataInputStream dis = new DataInputStream(ftpClient.nameList(path)); String filename = &quot;&quot;; while ((filename = dis.readLine()) != null) { list.add(filename); } } catch (Exception e) { e.printStackTrace(); } return list; } /** * closeServer 断开与ftp服务器的链接 * * @throws java.io.IOException */ public void closeServer() throws IOException { if (ftpClient != null) { ftpClient.closeServer(); } } }</textarea>