Implementing file uploads using the Commons-fileupload component

1. Get the Commons-fileupload component

Download this component in Http://jakarta.apache.org/site/downloads, unzip the file and copy Commoms-fileupload-1.2.jar to the Web-inf/lib directory

2. When using the Commons-fileupload component, another build Commoms-io support is required, which can be found on the http://jakarta.apache.org/site/downloads. Commoms-io.jar copy after download complete

To the Web-inf/lib file directory

You can use this component to complete file uploads through the above configuration:

jsp page for file upload

<%@ page contenttype= "text/html; charset=gb2312 "%>  
 


Servlet that accepts form implementation file uploads


Package servlets;
Import Java.io.File;
Import java.io.IOException;
Import Java.io.PrintWriter;

Import Java.util.Iterator;
Import javax.servlet.ServletException;
Import Javax.servlet.http.HttpServlet;
Import Javax.servlet.http.HttpServletRequest;

Import Javax.servlet.http.HttpServletResponse;
Import Org.apache.commons.fileupload.FileItem;
Import Org.apache.commons.fileupload.FileItemFactory;
Import org.apache.commons.fileupload.FileUploadException;
Import Org.apache.commons.fileupload.disk.DiskFileItemFactory;

Import Org.apache.commons.fileupload.servlet.ServletFileUpload; public class FileUpload extends HttpServlet {public void DoPost (HttpServletRequest request, HttpServletResponse respons E) throws IOException, Servletexception//Judging whether the submitted form Boolean ismultipart for file upload = Servletfileupload.ismultipart
		Content (Request);
			if (Ismultipart) {//Create a File Upload object Fileitemfactory factory = new Diskfileitemfactory (); Servletfileupload upload = new Servletfileupload (factory);
			Iterator items;
				try {//Resolve all file contents submitted by the form items = upload.parserequest (request). iterator ();
					while (Items.hasnext ()) {Fileitem item = (Fileitem) items.next ();    
					    if (!item.isformfield ()) {//Remove file name of uploaded file String name = Item.getname ();
					    String fileName = name.substring (name.lastindexof (' \ \ ') +1,name.length ());
					    String Path = Request.getrealpath ("file") +file.separatorchar+filename;
					    Upload file UploadedFile = new files (path);
					    
					    Item.write (UploadedFile);
						Print Upload success Information Response.setcontenttype ("text/html");
					    Response.setcharacterencoding ("gb2312");
					    PrintWriter out = Response.getwriter ();
					    Out.print ("<font size= ' 2 ' > uploaded file as:" +name+ "<br>");
					Out.print ("Saved address is:" +path+ "</font>");
			(Exception e) {//TODO auto-generated catch block E.printstacktrace ();
 }			
		}		
	}
}
 

 


Note: Create a new file folder in the Webroot directory of your project to store the location of your uploaded files.