Spring MVC File Upload Tutorial

1-Introduction This tutorial article is based on Spring MVC to implement the file upload function, here is the main implementation of two functions: 1, upload a single file and move it to the corresponding upload directory, 2, upload multiple files at once and store them in the specified folder, next we step by step implementation. 2-Create a project

• File/new/other.

Input:

• Group ID:com.yiibai
• Artifact Id:springmvcfileupload
• Package:com.yiibai.springmvcfileupload

In this way, the project is created, as shown in:

Do not worry about an error message when the project is created. The reason is that you have not yet declared the servlet library.

Attention:

Eclipse 4.4 (Luna) may have an error creating a Maven project structure and need to fix it.
3-Configuring MAVEN

• Pom.xml

<project xmlns= "http://maven.apache.org/POM/4.0.0" xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xsi: schemalocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd" > <modelversion >4.0.0</modelVersion> <groupId>com.yiibai</groupId> <artifactid>springmvcfileupload </artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name >springmvcfileupload Maven webapp</name> <url>http://maven.apache.org</url> <dependencies&        Gt            <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId>          <version>3.8.1</version> <scope>test</scope> </dependency>        <!--Servlet API--<!--HTTP://MVNREPOSITORY.COM/ARTIFACT/JAVAX.SERVLET/JAVAX.SERVLET-API--          <dependency>  <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> & lt;! --Jstl for JSP page--<!--Http://mvnrepository.com/artifact/javax.servlet/jstl--<dependen            Cy> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!--JSP API--<!--http://m Vnrepository.com/artifact/javax.servlet.jsp/jsp-api-<dependency> &LT;GROUPID&GT;JAVAX.SERVL Et.jsp</groupid> <artifactId>jsp-api</artifactId> &LT;VERSION&GT;2.2&LT;/VERSION&G            T <scope>provided</scope> </dependency> <!--Spring Dependencies--<!-- http://mvnrepository.com/artifact/org.springframework/spring-core-<dependency> <groupid>org .springframework</groupid> <artifactId>spring-core</artifactId> <version>4.1 .4.release</version> </dependency> <!--http://mvnrepository.com/artifact/org.springframewor K/spring-web-<dependency> <groupId>org.springframework</groupId> &lt ;artifactid>spring-web</artifactid> <version>4.1.4.RELEASE</version> </dependenc             Y> <!--HTTP://MVNREPOSITORY.COM/ARTIFACT/ORG.SPRINGFRAMEWORK/SPRING-WEBMVC-<dependency> <groupId>org.springframework</groupId> &LT;ARTIFACTID&GT;SPRING-WEBMVC&LT;/ARTIFACTID&G            T        <version>4.1.4.RELEASE</version> </dependency> <!--Apache Commons FileUpload-- <! --Http://mvnrepository.com/artifact/commons-fileupload/commons-fileupload <dependency> &lt            ;groupid>commons-fileupload</groupid> <artifactId>commons-fileupload</artifactId>  <version>1.3.1</version> </dependency> <!--Apache Commons IO---<!-- Http://mvnrepository.com/artifact/commons-io/commons-io-<dependency> <groupid>common S-io</groupid> <artifactId>commons-io</artifactId> <version>2.4</version&        Gt </dependency> </dependencies> <build> <finalname>springmvcfileupload</finalname&gt        ; <plugins> <!--config:maven Tomcat Plugin--<!--HTTP://MVNREPOSITORY.COM/ARTIFAC T/org.apache.tomcat.maven/tomcat7-maven-plugin-<plugin> <groupid>org.apache.t OmCat.maven</groupid> <artifactId>tomcat7-maven-plugin</artifactId> <vers Ion>2.2</version> <!--Config:contextpath and Port (Default-/springmvcfileu pload:8080)-<!--<configuration> <p                Ath>/</path> <port>8899</port> </configuration> -</plugin> </plugins> </build> </project>

4-Configure Spring

Configure Web. Xml.

Springcontextlistener will read the parameters contextconfiglocation in the configuration file:

• Web-inf/web.xml

<web-app xmlns= "Http://java.sun.com/xml/ns/javaee" xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xsi: schemalocation= "Http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version= "3. 0 "> <display-name>archetype Created Web application</display-name> <servlet> <servlet-n Ame>spring-mvc</servlet-name> <servlet-class> Org.springframework.web.servlet.DispatcherSer Vlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet -mapping> <servlet-name>spring-mvc</servlet-name> <url-pattern>/</url-pattern> &L T;/servlet-mapping> <!--other XML Configuration--<!--Load by Spring Contextloaderlistener--& Lt;context-param> <param-name>contextConfigLocation</param-name> <param-value>/      Web-inf/root-context.xml  </param-value> </context-param> <!--Spring Contextloaderlistener---<listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </ Listener> </web-app>

To configure Spring MVC:

• Web-inf/spring-mvc-servlet.xml

<?xml version= "1.0" encoding= "UTF-8"? ><beans xmlns= "Http://www.springframework.org/schema/beans" xmlns: Xsi= "Http://www.w3.org/2001/XMLSchema-instance" xmlns:p= "http://www.springframework.org/schema/p" xmlns:context= "Http://www.springframework.org/schema/context" xmlns:mvc= "Http://www.springframework.org/schema/mvc" xsi: schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/ Spring-beans-4.1.xsd Http://www.springframework.org/schema/context Http://www.springframework.org/schema/context /spring-context-4.1.xsd Http://www.springframework.org/schema/mvc Http://www.springframework.org/schema/mvc/spri Ng-mvc-4.1.xsd "> <!--Package Scan--<context:component-scan base-package=" COM.YIIBAI.SPRINGMVCFILEUPL Oad "/> <!--enables the Spring MVC Annotation Configuration--<context:annotation-config/> &L T;bean class= "org.springframework.web.servlet.view.InternalResourceviewresolver "> <property name=" prefix "> <value>/WEB-INF/pages/</value>    </property> <property name= "suffix" > <value>.jsp</value> </property> </bean> <bean id= "Multipartresolver" class= "Org.springframework.web.multipart.commons.CommonsMulti  Partresolver > <!--Maximum file SIZE:1MB-and <!--1MB = 125000 Byte-to-<property Name= "Maxuploadsize" value= "125000"/> </bean> </beans>

• Web-inf/root-context.xml

<?xml version= "1.0" encoding= "UTF-8"? ><beans xmlns= "Http://www.springframework.org/schema/beans"    Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"    xsi:schemalocation= "http://www.springframework.org/ Schema/beans    http://www.springframework.org/schema/beans/spring-beans.xsd ">    <!--Empty--</ Beans>

5-java class

• Myfileuploadcontroller.java

Package com.yiibai.springmvcfileupload; Import Java.io.bufferedoutputstream;import java.io.file;import Java.io.fileoutputstream;import java.util.ArrayList ; Import java.util.List; Import Javax.servlet.http.HttpServletRequest; Import Org.springframework.stereotype.controller;import Org.springframework.ui.model;import Org.springframework.web.bind.annotation.requestmapping;import Org.springframework.web.bind.annotation.requestmethod;import Org.springframework.web.bind.annotation.requestparam;import Org.springframework.web.multipart.MultipartFile;    @Controllerpublic class Myfileuploadcontroller {//Upload one File. @RequestMapping (value = "/uploadonefile") public String Uploadonefilehandler () {//Forward to "/web-inf/pages/u        Ploadonefile.jsp ".    return "Uploadonefile";    }//Upload Multi File. @RequestMapping (value = "/uploadmultifile") public String Uploadmultifilehandler () {//Forward to "/web-inf/pag        Es/uploadmultifile.jsp ". Return "UPLOADMULtifile ";    }//uploadonefile.jsp, uploadmultifile.jsp submit to. @RequestMapping (value = "/doupload", method = requestmethod.post) public String Uploadfilehandler (HttpServletRequest re        Quest, Model Model, @RequestParam ("file") multipartfile[] files) {//Root Directory.        String Uploadrootpath = Request.getservletcontext (). Getrealpath ("Upload");         System.out.println ("uploadrootpath=" + Uploadrootpath);        File Uploadrootdir = new file (Uploadrootpath);        Create directory If it is not exists.        if (!uploadrootdir.exists ()) {uploadrootdir.mkdirs ();        }//List<file> uploadedfiles = new arraylist<file> ();             for (int i = 0; i < files.length; i++) {Multipartfile file = Files[i];            Client File name String name = File.getoriginalfilename ();             System.out.println ("Client File Name =" + name); if (name! = nulL && name.length () > 0) {try {byte[] bytes = File.getbytes ();                            Create the file on server file Serverfile = new file (Uploadrootdir.getabsolutepath ()                     + file.separator + name);                    Stream to the write data to file in server.                    Bufferedoutputstream stream = new Bufferedoutputstream (new FileOutputStream (Serverfile));                    Stream.Write (bytes);                    Stream.Close ();                    Uploadedfiles.add (Serverfile);                System.out.println ("Write file:" + serverfile);                } catch (Exception e) {System.out.println ("Error Write file:" + name);        }}} model.addattribute ("Uploadedfiles", uploadedfiles);    return "Uploadresult"; } }

6-View (JSP)

• uploadonefile.jsp

<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "    pageencoding=" UTF-8 "%>
 
 

  
  
 
   
uploadmultifile.jsp
 
  
 
 
<%@ page language= "java" contenttype= "text/html; Charset=utf-8" pageEncoding= "UTF-8"%>
 
  

  
   
 
    
uploadresult.jsp
 
   
 
  
<%@ page language= "java" contenttype= "text/html; Charset=utf-8 "    pageencoding=" UTF-8 "%> <% @taglib uri=" Http://java.sun.com/jsp/jstl/core "prefix=" C "%>     
7-Run the application first, before you run the application, you need to build the entire project. Right-click the project and select:

Run Configuration:
Input:
 
   

  
    
 
     
Name:run Springmvcfileupload
 
     
Base directory: ${workspace_loc:/springmvcfileupload}
 
     
Goals:tomcat7:run
 
    
 
   




Click Run:

 
   

  
    
 
     
Http://localhost:8080/SpringMVCFileUpload/uploadOneFile


 
    
 
   
 
   

  
    
 
     
Http://localhost:8080/SpringMVCFileUpload/uploadMultiFile

A
 
    
 
   
Spring MVC File Upload Tutorial