JAVA中使用FTPClient上传下载

 1     /**
 2      * Description: 向FTP服务器上传文件
 3      * @Version1.0 Jul 27, 2008 4:31:09 PM by 崔红保（cuihongbao@d-heaven.com）创建
 4      * @param url FTP服务器hostname
 5      * @param port FTP服务器端口
 6      * @param username FTP登录账号
 7      * @param password FTP登录密码
 8      * @param path FTP服务器保存目录
 9      * @param filename 上传到FTP服务器上的文件名
10      * @param input 输入流
11      * @return 成功返回true，否则返回false
12      */
13     public static boolean uploadFile(String url,int port,String username, String password, String path, String filename, InputStream input) {
14         boolean success = false;
15         FTPClient ftp = new FTPClient();
16         try {
17             int reply;
18             ftp.connect(url, port);//连接FTP服务器
19             //如果采用默认端口，可以使用ftp.connect(url)的方式直接连接FTP服务器
20             ftp.login(username, password);//登录
21             reply = ftp.getReplyCode();
22             if (!FTPReply.isPositiveCompletion(reply)) {
23                 ftp.disconnect();
24                 return success;
25             }
26             ftp.changeWorkingDirectory(path);
27             ftp.storeFile(filename, input);            
28             
29             input.close();
30             ftp.logout();
31             success = true;
32         } catch (IOException e) {
33             e.printStackTrace();
34         } finally {
35             if (ftp.isConnected()) {
36                 try {
37                     ftp.disconnect();
38                 } catch (IOException ioe) {
39                 }
40             }
41         }
42         return success;
43     }<pre></pre>

 1     @Test
 2     public void testUpLoadFromDisk(){
 3         try {
 4             FileInputStream in=new FileInputStream(new File("D:/test.txt"));
 5             boolean flag = uploadFile("127.0.0.1", 21, "test", "test", "D:/ftp", "test.txt", in);
 6             System.out.println(flag);
 7         } catch (FileNotFoundException e) {
 8             e.printStackTrace();
 9         }
10     }<pre></pre>

 1     @Test
 2     public void testUpLoadFromString(){
 3         try {
 4             InputStream input = new ByteArrayInputStream("test ftp".getBytes("utf-8"));
 5             boolean flag = uploadFile("127.0.0.1", 21, "test", "test", "D:/ftp", "test.txt", input);
 6             System.out.println(flag);
 7         } catch (UnsupportedEncodingException e) {
 8             e.printStackTrace();
 9         }
10     }<pre></pre>

 1     /**
 2      * Description: 从FTP服务器下载文件
 3      * @Version1.0 Jul 27, 2008 5:32:36 PM by 崔红保（cuihongbao@d-heaven.com）创建
 4      * @param url FTP服务器hostname
 5      * @param port FTP服务器端口
 6      * @param username FTP登录账号
 7      * @param password FTP登录密码
 8      * @param remotePath FTP服务器上的相对路径
 9      * @param fileName 要下载的文件名
10      * @param localPath 下载后保存到本地的路径
11      * @return
12      */
13     public static boolean downFile(String url, int port,String username, String password, String remotePath,String fileName,String localPath) {
14         boolean success = false;
15         FTPClient ftp = new FTPClient();
16         try {
17             int reply;
18             ftp.connect(url, port);
19             //如果采用默认端口，可以使用ftp.connect(url)的方式直接连接FTP服务器
20             ftp.login(username, password);//登录
21             reply = ftp.getReplyCode();
22             if (!FTPReply.isPositiveCompletion(reply)) {
23                 ftp.disconnect();
24                 return success;
25             }
26             ftp.changeWorkingDirectory(remotePath);//转移到FTP服务器目录
27             FTPFile[] fs = ftp.listFiles();
28             for(FTPFile ff:fs){
29                 if(ff.getName().equals(fileName)){
30                     File localFile = new File(localPath+"/"+ff.getName());
31                     
32                     OutputStream is = new FileOutputStream(localFile); 
33                     ftp.retrieveFile(ff.getName(), is);
34                     is.close();
35                 }
36             }
37             
38             ftp.logout();
39             success = true;
40         } catch (IOException e) {
41             e.printStackTrace();
42         } finally {
43             if (ftp.isConnected()) {
44                 try {
45                     ftp.disconnect();
46                 } catch (IOException ioe) {
47                 }
48             }
49         }
50         return success;
51     }