This is another complete Spring MVC tutorial which accepts file on Upload form and copy it to specificfolder on “Submit” event. As usual we have a dependency on Hello World Spring MVC Example.

So, these are the additions / changes we need to perform in this example:

• New file: CrunchifyFileUploadController.java
• New file: CrunchifyFileUpload.java
• New file: uploadfile.jsp
• New file: uploadfilesuccess.jsp
• Modified file: crunchify-servlet.xml
• 2 new jar files: commons-io-2.4.jar and commons-fileupload-1.3.jar

Here is a final project structure so you will get some idea on where to add files.

Now let’s get started:

Step1: Pre-Requisite:

http://crunchify.com/hello-world-example-spring-mvc-3-2-1/ (Deploy this project successfully onTomcat)

Maven Dependencies:

Add below new dependencies to your project’s pom.xml file.

Step2: SpringController

Create a Spring 3 MVC based controller which handles file upload. There are two methods in thiscontroller:

1. crunchifyDisplayForm – It simply forwards request to the pageuploadfile.jsp
2. crunchifySave – Fetches the form using @ModelAttribute annotation and get the File content from it. It creates a list of filenames of files being uploaded and pass this list to success page.

Step3: Model – Form Object

Create a Java bean which acts as Model/Form object for our Spring application. This bean contains a List of org.springframework.web.multipart.MultipartFile objects. Spring framework provides a useful class MultipartFile which can be used to fetch the file content of uploaded file. Apart from its content, the MultipartFile object also gives you other useful information such as filename, file size etc.

Step4: JSP Views

Now create the view pages for this application. We will need two JSPs, one to display file upload form and another to show result on successful upload.

The uploadfile.jsp displays a form with file input. Apart from this we have added small jquery snippetonclick of Add button. This will add a new file input component at the end of form. This allows user toupload as many files as they want.

Note that we have set enctype=”multipart/form-data” attribute of our <form> tag.

Step5: Update Spring Configuration

Add below bean to crunchify-servlet.xml  file, just above  <beanid="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">  line.

Step6: Checkout Result

Start tomcat and point your browser to this URL: http://localhost:8080/CrunchifySpringMVC3.2.1/upload.html and you should see screen similar tothis.

After file upload you will see success message like this. You can always beautify your .jsp file the wayyou want.

List of all Spring MVC Examples, Java Examples.