Java code implementation FTP single file download (ii)

One: Download the Commons-net-1.4.1.jar package, put it under LIB, and load it into the. classpath file

Two: Write Tool class Ftputil.java as follows

2. Package common;
6. Import Java.io.File;
8. Import java.io.FileNotFoundException;
10. Import Java.io.FileOutputStream;
12. Import java.io.IOException;
14. Import Java.io.OutputStream;
16. Import java.net.SocketException;
18. Import java.util.Properties;
20. Import Org.apache.log4j.Logger;
22. Import Org.apache.commons.logging.Log;
24. Import Org.apache.commons.logging.LogFactory;
26. Import org.apache.commons.net.ftp.*;
32. Public class Ftputil {
36. Private final static Log logger = Logfactory.getlog (ftputil.   Class);
40. /** 
42. * Get FtpClient Object
44. *
46. * @param ftphost
48. * FTP Host Server
50. * @param FTPPassword
52. * FTP Login Password
54. * @param ftpusername
56. * FTP Login user name
58. * @param ftpport
60. * FTP port defaults to 21
62. * @return
64. */
66. public static FtpClient getftpclient (String ftphost, String ftpusername,
68. String FTPPassword, int ftpport) {
70. FtpClient ftpclient = new FtpClient ();
72. try {
74. FtpClient = new FtpClient ();
76. Ftpclient.connect (Ftphost, FtpPort); //Connect FTP server
78. Ftpclient.login (FtpUserName, FTPPassword); //Login FTP server
80. if (! Ftpreply.ispositivecompletion (Ftpclient.getreplycode ())) {
82. Logger.info ("Not connected to FTP, user name or password is incorrect.  ");
84. Ftpclient.disconnect ();
86. } Else {
88. Logger.info ("FTP connection succeeded.  ");
90. }
92. } catch (SocketException e) {
94. E.printstacktrace ();
96. Logger.info ("FTP IP address may be wrong, please configure it correctly.")  ");
98. } catch (IOException e) {
100. E.printstacktrace ();
102. Logger.info ("FTP port error, please configure it correctly.")  ");
104. }
106. return ftpclient;
108. }
112. /* 
114. * Download files from FTP server
116. *
118. * @param ftphost FTP IP Address
120. *
122. * @param ftpusername FTP user name
124. *
126. * @param ftppassword FTP user name password
128. *
130. * @param ftpport FTP port
132. *
134. * @param the path format of files in Ftppath FTP server: FTPTEST/AA
136. *
138. * @param localPath Download to local location format: h:/download
140. *
142. * @param filename File name
144. */
146. public static void Downloadftpfile (String ftphost, String ftpusername,
148. String FTPPassword, int ftpport, string ftppath, String LocalPath,
150. String fileName) {
154. FtpClient ftpclient = null;
158. try {
160. FtpClient = Getftpclient (Ftphost, FtpUserName, FTPPassword, FtpPort);
162. Ftpclient.setcontrolencoding ("UTF-8"); //Chinese support
164. Ftpclient.setfiletype (Ftpclient.binary_file_type);
166. Ftpclient.enterlocalpassivemode ();
168. Ftpclient.changeworkingdirectory (Ftppath);
172. File LocalFile = new File (LocalPath + File.separatorchar + fileName);
174. OutputStream OS = new FileOutputStream (LocalFile);
176. Ftpclient.retrievefile (fileName, OS);
178. Os.close ();
180. Ftpclient.logout ();
184. } catch (FileNotFoundException e) {
186. Logger.error ("not found" + Ftppath + "file");
188. E.printstacktrace ();
190. } catch (SocketException e) {
192. Logger.error ("Connection to FTP failed.");
194. E.printstacktrace ();
196. } catch (IOException e) {
198. E.printstacktrace ();
200. Logger.error ("file read error.  ");
202. E.printstacktrace ();
204. }
208. }
216. }

Third, the test code

Suppose there is already an FTP server, login username and password for ZYF, Port 22, log into the FTPDir directory under the home directory, there is a 11.txt file for download test

2. Package scripts.testscript;
6. Import Org.testng.annotations.Test;
10. Import common. Ftputil;
14. Public class Ftpdownloadtestscript {
16. @Test
18. public Void Run () {
22. String ftphost = "192.168.26.132";
24. String ftpusername = "ZYF";
26. String FTPPassword = "ZYF";
28. int ftpport = 21;
30. String Ftppath = "ftpdir/";
32. String LocalPath = "H:/download";
34. String fileName = "11.txt";
36. Ftputil.downloadftpfile (Ftphost, FtpUserName, FTPPassword, FtpPort, Ftppath, LocalPath, fileName);
38. }
40. }

Java code implementation FTP single file download (ii)