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     @Override21     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
     
       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.jpg38                                                                                 // -=>39                                                                                 // jpg40             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 }