【本文简介】
一个servlet 多文件上传的简单例子。
【依赖包】
- commons-fileupload-1.3.1.jar
- commons-io-2.2.jar
【依赖包下载】
- commons-fileupload-1.3.1.jar：http://commons.apache.org/proper/commons-fileupload/download_fileupload.cgi
- commons-io-2.2.jar：http://commons.apache.org/proper/commons-io/download_io.cgi
【文件夹结构】
【HTML表单】
1 <body> 2 <form action="UploadServlet" method="post" enctype="multipart/form-data"> 3 <input name="file" type="file" /> 4 <input name="file" type="file" /> 5 <input type="submit" value="上传"/> 6 </form> 7 </body>
【java代码】
1 package com.zjm.www.servlet;
2
3 import java.io.File;
4 import java.io.IOException;
5 import java.io.PrintWriter;
6 import java.util.Iterator;
7
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.disk.DiskFileItemFactory;
16 import org.apache.commons.fileupload.servlet.ServletFileUpload;
17
18 /**
19 * @描述 servlet 通过 FileItem 实现多文件上传
20 * @作者 小M
21 * @博客 http://www.cnblogs.com/xiaoMzjm/
22 * @时间 2014/07/30
23 */
24 public class UploadServlet extends HttpServlet {
25
26 private static final long serialVersionUID = 1L;
27
28 public void doGet(HttpServletRequest request, HttpServletResponse response)
29 throws ServletException, IOException {
30 doPost(request, response);
31 }
32
33 @SuppressWarnings("unchecked")
34 public void doPost(HttpServletRequest request, HttpServletResponse response)
35 throws ServletException, IOException {
36
37 // 转码，建议使用过滤器转码
38 request.setCharacterEncoding("utf-8");
39 response.setCharacterEncoding("utf-8");
40 response.setContentType("text/html;charset=utf-8");
41
42 // 判断提交过来的表单是否为文件上传菜单，只适用于servlet
43 boolean isMultipart = ServletFileUpload.isMultipartContent(request);
44
45 if (isMultipart) {
46 // 构造一个文件上传处理对象
47 FileItemFactory factory = new DiskFileItemFactory();
48 ServletFileUpload upload = new ServletFileUpload(factory);
49
50 Iterator<FileItem> items;
51
52 try {
53 // 解析表单中提交的所有文件内容
54 items = upload.parseRequest(request).iterator();
55
56 while (items.hasNext()) {
57
58 FileItem item = (FileItem) items.next();
59
60 if (!item.isFormField()) {
61
62 // 取出上传文件的文件名称
63 String name = item.getName();
64
65 // 取得上传文件以后的存储路径
66 String fileName = name.substring(
67 name.lastIndexOf(‘\\‘) + 1, name.length());
68
69 // 上传文件以后的存储路径 ， 有关路径问题，请参考另一篇博文：http://www.cnblogs.com/xiaoMzjm/p/3878758.html
70 String path = request.getServletContext().getRealPath("/")+"\\UpLoadFile"
71 + File.separatorChar + fileName;
72
73 // 上传文件
74 File uploaderFile = new File(path);
75 item.write(uploaderFile);
76
77 // 打印上传成功信息
78 PrintWriter out = response.getWriter();
79 out.print("success");
80 }
81 }
82 } catch (Exception e) {
83 e.printStackTrace();
84 }
85 }
86 }
87 }
servlet 通过 FileItem 实现多文件上传,布布扣,bubuko.com
时间： 2024-10-14 21:51:55