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.   
7.     <context-param>  
8.         <param-name>tempXlsPath</param-name><!-- 要上传的目录 -->  
9.         <param-value>/WEB-INF/temp/</param-value>  
10.     </context-param>  
11.   
12.   
13. <servlet>  
14.  <servlet-name>UploadServlet</servlet-name>  
15.         <servlet-class>  
16.             com.thams.web.fileServlet.UploadServlet  
17.         </servlet-class>  
18.     </servlet>  
19.     <servlet-mapping>  
20.         <servlet-name>UploadServlet</servlet-name>  
21.         <url-pattern>/servlet/UploadServlet</url-pattern>  
22.     </servlet-mapping>  

 

 

servlet

 

Java代码  

1. package com.thams.web.fileServlet;  
2.   
3. import java.io.File;  
4. import java.io.IOException;  
5. import java.util.List;  
6.   
7. import javax.servlet.ServletContext;  
8. import javax.servlet.ServletException;  
9. import javax.servlet.http.HttpServlet;  
10. import javax.servlet.http.HttpServletRequest;  
11. import javax.servlet.http.HttpServletResponse;  
12.   
13. import org.apache.commons.fileupload.FileItem;  
14. import org.apache.commons.fileupload.FileItemFactory;  
15. import org.apache.commons.fileupload.FileUploadException;  
16. import org.apache.commons.fileupload.disk.DiskFileItemFactory;  
17. import org.apache.commons.fileupload.servlet.FileCleanerCleanup;  
18. import org.apache.commons.fileupload.servlet.ServletFileUpload;  
19. import org.apache.commons.io.FileCleaningTracker;  
20. import org.apache.commons.io.FilenameUtils;  
21. import org.apache.log4j.Logger;  
22.   
23. /** 
24.  * @author serv 
25.  */  
26. public class UploadServlet extends HttpServlet {  
27.   
28.     private static Logger log = Logger.getLogger(UploadServlet.class);  
29.       
30.     protected void service(HttpServletRequest request,  
31.             HttpServletResponse response) throws ServletException, IOException {  
32.         response.setContentType("text/html;charset=UTF-8");  
33.         // Check that we have a file upload request  
34.         boolean isMultipart = ServletFileUpload.isMultipartContent(request);  
35.         if (!isMultipart) {  
36.             log.debug("没有可上传的文件, 你想干什么 !");  
37.             return;  
38.         }  
39.         // Create a factory for disk-based file items  
40.         String tempFilePath = getServletContext().getRealPath("/")+getServletContext().getInitParameter("tempXlsPath");  
41.         FileItemFactory factory = newDiskFileItemFactory(getServletContext(), new File(tempFilePath));  
42.         // Create a new file upload handler  
43.         ServletFileUpload upload = new ServletFileUpload(factory);  
44.         upload.setHeaderEncoding("UTF-8");  
45.         /* FileItem */  
46.         List<FileItem> items = null;  
47.         try {  
48.             // Parse the request  
49.             items = (List<FileItem>) upload.parseRequest(request);  
50.             String filename = null;  
51.             for (FileItem fileItem : items) {  
52.                 if (!fileItem.isFormField()){//file  
53.                     filename = FilenameUtils.getName(fileItem.getName());  
54.                     fileItem.write(new File(tempFilePath+filename));  
55.                     response.getWriter().write(tempFilePath+filename+"<br>");  
56.                 }  
57.             }  
58.         } catch (FileUploadException e) {  
59.             log.error(e.getMessage());  
60.         } catch (Exception e) {  
61.             log.error(e.getMessage());  
62.         }  
63.     }  
64.     /** 
65.      * The FileCleanerCleanup provides an instance of org.apache.commons.io.FileCleaningTracker.  
66.      * This instance must be used when creating a org.apache.commons.fileupload.disk.DiskFileItemFactory. 
67.      */  
68.     public static DiskFileItemFactory newDiskFileItemFactory(  
69.             ServletContext context, File repository) {  
70.         FileCleaningTracker fileCleaningTracker = FileCleanerCleanup  
71.                 .getFileCleaningTracker(context);  
72.         DiskFileItemFactory factory = new DiskFileItemFactory(  
73.                 DiskFileItemFactory.DEFAULT_SIZE_THRESHOLD, repository);  
74.         factory.setFileCleaningTracker(fileCleaningTracker);  
75.         return factory;  
76.     }  
77.   
78. }  

 

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