1 package cn.servlet;
2
3 import java.io.File;
4 import java.io.IOException;
5 import java.util.List;
6 import java.util.UUID;
7
8 import javax.servlet.ServletException;
9 import javax.servlet.annotation.WebServlet;
10 import javax.servlet.http.HttpServlet;
11 import javax.servlet.http.HttpServletRequest;
12 import javax.servlet.http.HttpServletResponse;
13
14 import org.apache.commons.fileupload.FileItem;
15 import org.apache.commons.fileupload.disk.DiskFileItemFactory;
16 import org.apache.commons.fileupload.servlet.ServletFileUpload;
17
18 @WebServlet(urlPatterns = "/up2")
19 public class Up2Servlet extends HttpServlet {
20 @Override
21 protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
22 req.setCharacterEncoding("UTF-8");
23
24 DiskFileItemFactory disk = new DiskFileItemFactory();
25 ServletFileUpload up = new ServletFileUpload(disk);
26 // 如果你不知道用户上传多少个文件，则应该遍历
27 try {
28 List<FileItem> list = up.parseRequest(req);
29 FileItem item1 = list.get(0);
30 String name = item1.getString("UTF-8");// 对于非文件，用于这种方式来获取用户提交的
31 FileItem item2 = list.get(1);
32 String age = item2.getString("UTF-8");
33 FileItem item3 = list.get(2);
34 String fileName = item3.getName();
35 fileName = fileName.substring(fileName.lastIndexOf("\\") + 1);
36 // 对文件重名称
37 String extName = fileName.substring(fileName.lastIndexOf(".") + 1);// abc.jpg
38 // -=>
39 // jpg
40 String uuid = UUID.randomUUID().toString().replace("-", "");
41 String newFileName = uuid + "." + extName;
42 // 获取文件上传的真实的目录
43 String realPath = getServletContext().getRealPath("/files");
44 // 实现文件上传
45 item3.write(new File(realPath, newFileName));
46 // 将转发到show.jsp显示
47 req.setAttribute("name", name);
48 req.setAttribute("age", age);
49 req.setAttribute("oldFileName", fileName);
50 req.setAttribute("newFileName", newFileName);
51 req.getRequestDispatcher("/jsps/show.jsp").forward(req, resp);
52 } catch (Exception e) {
53 e.printStackTrace();
54 }
55
56 }
57 }
