anchor.diff:  <%@ page import="org.apache.commons.fileupload.disk.DiskFileItemFactory" %>
   <%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload" %>
   <%@ page import="java.util.List" %>
  +<%@ page import="java.io.*" %>
   <%@ page contentType="text/html; charset=UTF-8" %>
   <html>
   <head>
  
positive.code: 			DiskFileItemFactory factory = new DiskFileItemFactory();
  			ServletFileUpload upload = new ServletFileUpload(factory);
  			List<FileItem> items = upload.parseRequest(request);
  			for (FileItem item: items) { 
  				String content = new String(item.get());
  			%>
  				<div>
  					<p>file name: <%= item.getName() %></p>
  					<div><%= content %></div>
  				</div>
  			<%}
  		}
  	} catch (Exception e) {
  	    out.print(e);
  
negative.code: %>
  </body>
  </html>
  
  