java 支持 超大上G , 多附件上传

首先 确定要上传的目录

WEB.XML 文件

Java代码  

1. <listener>
2. <listener-class><!-- 临时文件收集器 , 支持超大附件必须项 -->
3. org.apache.commons.fileupload.servlet.FileCleanerCleanup
4. </listener-class>
5. </listener>
6. <context-param>
7. <param-name>tempXlsPath</param-name><!-- 要上传的目录 -->
8. <param-value>/WEB-INF/temp/</param-value>
9. </context-param>
10. <servlet>
11. <servlet-name>UploadServlet</servlet-name>
12. <servlet-class>
13. com.thams.web.fileServlet.UploadServlet
14. </servlet-class>
15. </servlet>
16. <servlet-mapping>
17. <servlet-name>UploadServlet</servlet-name>
18. <url-pattern>/servlet/UploadServlet</url-pattern>
19. </servlet-mapping>

servlet

Java代码  

1. package com.thams.web.fileServlet;
2. import java.io.File;
3. import java.io.IOException;
4. import java.util.List;
5. import javax.servlet.ServletContext;
6. import javax.servlet.ServletException;
7. import javax.servlet.http.HttpServlet;
8. import javax.servlet.http.HttpServletRequest;
9. import javax.servlet.http.HttpServletResponse;
10. import org.apache.commons.fileupload.FileItem;
11. import org.apache.commons.fileupload.FileItemFactory;
12. import org.apache.commons.fileupload.FileUploadException;
13. import org.apache.commons.fileupload.disk.DiskFileItemFactory;
14. import org.apache.commons.fileupload.servlet.FileCleanerCleanup;
15. import org.apache.commons.fileupload.servlet.ServletFileUpload;
16. import org.apache.commons.io.FileCleaningTracker;
17. import org.apache.commons.io.FilenameUtils;
18. import org.apache.log4j.Logger;
19. /**
20. * @author serv
21. */
22. public class UploadServlet extends HttpServlet {
23. private static Logger log = Logger.getLogger(UploadServlet.class);
24. protected void service(HttpServletRequest request,
25. HttpServletResponse response) throws ServletException, IOException {
26. response.setContentType("text/html;charset=UTF-8");
27. // Check that we have a file upload request
28. boolean isMultipart = ServletFileUpload.isMultipartContent(request);
29. if (!isMultipart) {
30. log.debug("没有可上传的文件, 你想干什么 !");
31. return;
32. }
33. // Create a factory for disk-based file items
34. String tempFilePath = getServletContext().getRealPath("/")+getServletContext().getInitParameter("tempXlsPath");
35. FileItemFactory factory = newDiskFileItemFactory(getServletContext(), new File(tempFilePath));
36. // Create a new file upload handler
37. ServletFileUpload upload = new ServletFileUpload(factory);
38. upload.setHeaderEncoding("UTF-8");
39. /* FileItem */
40. List<FileItem> items = null;
41. try {
42. // Parse the request
43. items = (List<FileItem>) upload.parseRequest(request);
44. String filename = null;
45. for (FileItem fileItem : items) {
46. if (!fileItem.isFormField()){//file
47. filename = FilenameUtils.getName(fileItem.getName());
48. fileItem.write(new File(tempFilePath+filename));
49. response.getWriter().write(tempFilePath+filename+"<br>");
50. }
51. }
52. } catch (FileUploadException e) {
53. log.error(e.getMessage());
54. } catch (Exception e) {
55. log.error(e.getMessage());
56. }
57. }
58. /**
59. * The FileCleanerCleanup provides an instance of org.apache.commons.io.FileCleaningTracker.
60. * This instance must be used when creating a org.apache.commons.fileupload.disk.DiskFileItemFactory.
61. */
62. public static DiskFileItemFactory newDiskFileItemFactory(
63. ServletContext context, File repository) {
64. FileCleaningTracker fileCleaningTracker = FileCleanerCleanup
65. .getFileCleaningTracker(context);
66. DiskFileItemFactory factory = new DiskFileItemFactory(
67. DiskFileItemFactory.DEFAULT_SIZE_THRESHOLD, repository);
68. factory.setFileCleaningTracker(fileCleaningTracker);
69. return factory;
70. }
71. }

测试页面

Java代码  

1. <form action="servlet/UploadServlet" method="post" enctype="multipart/form-data">
2. <input id="file1" name="file1" type="file" class="input400"><br>
3. <input id="file2" name="file2" type="file" class="input400"><br>
4. <input id="file3" name="file3" type="file" class="input400"><br>
5. <input id="file4" name="file4" type="file" class="input400"><br>
6. <input type="submit" id="submit" value="提交" />
7. </form>

测试结果

页面输出:

文件上传完成。

DEMO下载地址：https://dwz.cn/fgXtRtnu