Java Batch file package download

Often encountered the choice of multiple files for bulk download, you can first select all the files to generate a zip file, and then download, the zip file, you can achieve bulk download, but in the packaging process, often also appear in the downloaded ZIP file contains garbled file name, The encoding is implemented by using the Zipoutputstream in the Org.apache.tools.zip in Ant.jar.
The code is as follows:

Ant Package Reference

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2. <span style="font-size:14px">xml code
4. <dependency>
6. <groupId>ant</groupId>
8. <artifactid>ant</artifactid>
10. <version>1.6.5</version>
12. </Dependency> </span>

Compress the downloaded Action code

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2. <span style="font-size:14px">package demo.action;
6. Import Java.io.BufferedInputStream;
8. Import Java.io.BufferedOutputStream;
10. Import Java.io.File;
12. Import Java.io.FileInputStream;
14. Import Java.io.FileOutputStream;
16. Import java.io.IOException;
18. Import Java.io.InputStream;
20. Import Java.io.OutputStream;
22. Import Java.net.URLEncoder;
26. Import Javax.servlet.http.HttpServletResponse;
30. Import Org.apache.log4j.Logger;
32. Import Org.apache.struts2.ServletActionContext;
34. Import Org.apache.tools.zip.ZipEntry;
36. Import Org.apache.tools.zip.ZipOutputStream;
40. Import Com.opensymphony.xwork2.ActionSupport;
44. /**
46. * Bulk Download files:
48. * Use the org.apache.tools.zip.* in the Ant.jar package to complete the compression,
50. * Java native also has java.util.zip.* but the test does not take care of the compression
52. * Chinese problem with file name in document
54. * @author Yangcong
56. *
58. */
60. public class Batchdownloadaction extends Actionsupport {
64. Private Logger Log = Logger.getlogger (batchdownloadaction.class);
66. private static final String FilePath = "d:\\";
70. Private static final long serialversionuid = -8694640030455344419l;
74. Public String execute () {
76. The generated zip file is named Demo.zip
78. String tmpfilename = "Demo.zip";
80. byte[] buffer = new byte[1024];
82. String Strzippath = FilePath + tmpfilename;
84. try {
86. Zipoutputstream out = new Zipoutputstream (New FileOutputStream (
88. Strzippath));
90. Two files that need to be downloaded simultaneously result.txt, source.txt
92. file[] file1 = {new File (filepath+ "Test1.txt"),
94. New File (filepath+ "Test 2.docx")};
96. for (int i = 0; I < file1.length; i++) {
98. FileInputStream fis = new FileInputStream (File1[i]);
100. Out.putnextentry (New ZipEntry (File1[i].getname ()));
102. Set the character encoding within the compressed file, or it will become garbled
104. Out.setencoding ("GBK");
106. int Len;
108. Read the contents of the file to be downloaded and package it into a zip file
110. while (len = fis.read (buffer)) > 0) {
112. Out.write (buffer, 0, Len);
114. }
116. Out.closeentry ();
118. Fis.close ();
120. }
122. Out.close ();
124. This.downfile (GetResponse (), tmpfilename);
126. } catch (Exception e) {
128. Log.error ("File download Error", E);
130. }
132. return null;
134. }
138. /**
140. * Get response
142. * @return
144. */
146. Private HttpServletResponse GetResponse () {
148. return Servletactioncontext.getresponse ();
150. }
154. /**
156. * File Download
158. * @param response
160. * @param str
162. */
164. private void Downfile (httpservletresponse response, String str) {
166. try {
168. String Path = FilePath + str;
170. File file = new file (path);
172. if (file.exists ()) {
174. InputStream ins = new FileInputStream (path);
176. Bufferedinputstream bins = new Bufferedinputstream (INS);//put in the buffer stream
178. OutputStream outs = response.getoutputstream ();//Get file output IO stream
180. Bufferedoutputstream bouts = new Bufferedoutputstream (outs);
182. Response.setcontenttype ("Application/x-download");//Set the type of response content
184. Response.setheader (
186. "Content-disposition",
188. "Attachment; filename= "
190. + Urlencoder.encode (str, "UTF-8"));//Set Header information
192. int bytesread = 0;
194. byte[] buffer = new byte[8192];
196. Start transferring file streams to the network
198. while ((bytesread = bins.read (buffer, 0, 8192))! =-1) {
200. Bouts.write (buffer, 0, bytesread);
202. }
204. Bouts.flush ();//The Flush () method must be called here
206. Ins.close ();
208. Bins.close ();
210. Outs.close ();
212. Bouts.close ();
214. } else {
216. Response.sendredirect (".. /error.jsp ");
218. }
220. } catch (IOException e) {
222. Log.error ("File download Error", E);
224. }
226. }
228. }
232. After testing in a Windows environment, use STRUTS2</span>

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1. <span style="font-size:14px"> Resource Ant.jar:<a target="_blank" href= "http://blog.csdn.net/clare504/article/details/11962263">http://blog.csdn.net/clare504/article/ details/11962263</a></span>

http://blog.csdn.net/clare504/article/details/11962263/

Java Batch file package download