struts2 上傳文件 FtpClient ftp操作

網上很多介紹struts2 上傳文件的例子，但很多都忘記了說明要加上攔截器fileUploadStack,否則得到的file將會是空的，以下是項目中用到的代碼，同時涉及到ftp操作

Action類

/**
 * 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
 */
publicclass ViewAction extends ActionSupport{
privateint validateNum;
private File attachment;
private String attachmentFileName;
private String attachmentContentType;
@Action(interceptorRefs=@InterceptorRef("fileUploadStack"))
public String execute(){
        SingleMap map = SingleMap.getInstance();
int num_int=((Integer)map.map.get("login")).intValue();
        System.out.println("num_int:"+num_int+",validateNum:"+validateNum+"->"+(num_int==validateNum));
        System.out.println("size：" + map.map.size());
        map.map.remove("login");
if(num_int==validateNum){
            System.out.println(attachment == null);
            String targetDirectory = ServletActionContext.getServletContext()
                    .getRealPath("/temp");
            String targetFileName = generateFileName(attachmentFileName);
            File target = new File(targetDirectory, targetFileName);
            targetDirectory+="/"+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("192.168.32.130", "lidl", "aall", "/ftp");
                    System.out.println("filesize:"
                            + ftp.upload(targetDirectory) + "字節");
                } 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"success";
        }else{
return"error";
        }
    }
private String generateFileName(String fileName) {
             DateFormat format = new SimpleDateFormat("yyMMddHHmmss");
             String formatDate = format.format(new Date());

int random = new Random().nextInt(10000);

int position = fileName.lastIndexOf(".");
             String extension = fileName.substring(position);

return formatDate + random + extension;
         }
publicint getValidateNum() {
return validateNum;
    }
publicvoid setValidateNum(int validateNum) {
this.validateNum = validateNum;
    }
public File getAttachment() {
return attachment;
    }
publicvoid setAttachment(File attachment) {
this.attachment = attachment;
    }
public String getAttachmentFileName() {
return attachmentFileName;
    }
publicvoid setAttachmentFileName(String attachmentFileName) {
this.attachmentFileName = attachmentFileName;
    }
public String getAttachmentContentType() {
return attachmentContentType;
    }
publicvoid setAttachmentContentType(String attachmentContentType) {
this.attachmentContentType = attachmentContentType;
    }

}

（文件上傳 ，請在struts.xml裏配上  <constant name="struts.multipart.saveDir" value="/tmp"/> 用來保存臨時文件，同時爲了 讓系統清除臨時文件 請在web.xml裏配上 ）

web.xml

 <filter>
       <filter-name>struts-cleanup</filter-name>
       <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
   </filter>
<filter>
  <filter-name>struts2</filter-name>
  <filter-class>
           com.sword.actions.FilterDispetor
  </filter-class>
</filter>
    <filter-mapping>
       <filter-name>struts-cleanup</filter-name>
       <url-pattern>/*</url-pattern>
   </filter-mapping>
<filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

ftp 操作類

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;
publicclass FtpUtil {

private FtpClient ftpClient;
/**
     * connectServer 連接ftp服務器
     *
     * @throws java.io.IOException
     * @param path
     *            文件夾，空代表根目錄
     * @param password
     *            密碼
     * @param user
     *            登陸用戶
     * @param server
     *            服務器地址
     */
publicvoid connectServer(String server, String user, String password,
            String path) throws IOException {
// server：FTP服務器的IP地址；user:登錄FTP服務器的用戶名
// password：登錄FTP服務器的用戶名的口令；path：FTP服務器上的路徑
        ftpClient = new FtpClient();
        ftpClient.openServer(server);
        ftpClient.login(user, password);
// path是ftp服務下主目錄的子目錄
if (path.length() != 0)
            ftpClient.cd(path);
// 用2進制上傳、下載
        ftpClient.binary();
    }
/**
     * upload 上傳文件
     *
     * @throws java.lang.Exception
     * @return -1 文件不存在 -2 文件內容爲空 >0 成功上傳，返回文件的大小
     * @param newname
     *            上傳後的新文件名
     * @param filename
     *            上傳的文件
     */
publiclong 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 = newbyte[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
     */
publiclong upload(String filename) throws Exception {
        String newname = "";
if (filename.indexOf("/") > -1) {
            newname = filename.substring(filename.lastIndexOf("/") + 1);
        } else {
            newname = filename;
        }
return upload(filename, newname);
    }
/**
     * download 從ftp下載文件到本地
     *
     * @throws java.lang.Exception
     * @return
     * @param newfilename
     *            本地生成的文件名
     * @param filename
     *            服務器上的文件名
     */
publiclong 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 = newbyte[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;
    }
/**
     * 取得某個目錄下的所有文件列表
     *
     */
public List getFileList(String path) {
        List list = new ArrayList();
try {
            DataInputStream dis = new DataInputStream(ftpClient.nameList(path));
            String filename = "";
while ((filename = dis.readLine()) != null) {
                list.add(filename);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
return list;
    }
/**
     * closeServer 斷開與ftp服務器的鏈接
     *
     * @throws java.io.IOException
     */
publicvoid closeServer() throws IOException {
if (ftpClient != null) {
                ftpClient.closeServer();
            }
    }
}