Uploading of images

One: Required jar package

Commons-io.jar

Commons-fileupload.jar This package is dependent on Io

Second: Uploading the trilogy

Related classes:

Factory: Diskfileitemfactory

Parser: Servletfileupload

Form Item: Fileitem

1) Create a factory

New Diskfileitemfactory ();

2) Create parser

Servletfileupload  New servletfileupload (factory);

3) Use parser to parse request, get Fileitem collection

list<fileitem> Fileitem = servletfileupload.parserequest (request);

Three: Source code

　　
1.jsp

 <%-- Created by IntelliJ. User:yuwenhui Date:  2017/4/12 0012 time:  14:00  this  template Use File | Settings |  File Templates.  --%><%@ page contenttype= "Text/html;charset=utf-8" language= "java"%><% @taglib prefix= "C" uri= "/http Java.sun.com/jsp/jstl/core "%> username;  <input type=" text "name=" username "/><br /> Photo:  <input type= "file" Name= "Zhaopian"/><br/> <input type= " Submit "value=" upload "/></FORM></BODY></HTML> 

2: Configuration file

servlet>        <servlet-name>FileUploadServlet</servlet-name>        <servlet-class> Servlet. fileuploadservlet</servlet-class>    </servlet>    <servlet-mapping>        < Servlet-name>fileuploadservlet</servlet-name>        <url-pattern>/fileuploadservlet</ Url-pattern>    </servlet-mapping>

3:servlet

 Packageservlet;ImportOrg.apache.commons.fileupload.FileItem;Importorg.apache.commons.fileupload.FileUploadException;Importorg.apache.commons.fileupload.disk.DiskFileItemFactory;ImportOrg.apache.commons.fileupload.servlet.ServletFileUpload;ImportJava.io.File;Importjava.io.IOException;Importjava.util.List;/*** Created by Yuwenhui on 2017/4/12 0012.*/ Public classFileuploadservletextendsJavax.servlet.http.HttpServlet {protected voidDoPost (javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)throwsjavax.servlet.ServletException, IOException {request.setcharacterencoding ("Utf-8"); Response.setcontenttype ("Text/html;charset=utf-8");//Get the FactoryDiskfileitemfactory diskfileitemfactory=Newdiskfileitemfactory ();//Creating a parserServletfileupload servletfileupload =Newservletfileupload (diskfileitemfactory);//Get Fileitem Collection        Try{List<FileItem> fileitemlist =servletfileupload.parserequest (Request); Fileitem fileItem1= Fileitemlist.get (0); Fileitem fileItem2= Fileitemlist.get (1);//Show normal form itemsSystem.out.println ("normal form item:" +fileitem1.getfieldname () + ":" +fileitem1.getstring ("Utf-8"));//presentation file Form itemsSystem.out.println ("File Form Project Demo:"); System.out.println ("ContentType:" +Fileitem2.getcontenttype ()); System.out.println ("Name:" +fileitem2.getname ()); System.out.println ("Size:" +fileitem2.getsize ());//Create a file where the file directory is the true path to the uploaded fileFile Distfile =NewFile ("E:/javawebsrc/fileupload/destfile.jpg");//Save FileFileitem2.write (Distfile); } Catch(fileuploadexception e) {Throw  NewRuntimeException (e); } Catch(Exception e) {Throw NewRuntimeException (e); }    }    protected voidDoget (javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response)throwsjavax.servlet.ServletException, IOException {}}

Uploading of images