Spring MVC: Designing Real-World Web Applications

Handling file uploads

Most web applications require multipart file upload functionality. Spring MVC makes it extremely easy to handle this otherwise cumbersome feature. It provides two built-in implementations of MultiPartResolvers: CommonsMulipartResolver for Apache Commons FileUpload and StandardServletMultipartResolver for the Servlet 3.0 API.

Since most modern web applications use a Servlet 3.0 container, let's see how the FileUpload functionality can be handled using StandardServletMultipartResolver with the help of following example:

1. Register your MultipartResolver in your servlet-context.xml file (or add it programmatically if you are using a Java configuration):

   <beans:bean id="multipartResolver" class="org.springframework.web.multipart.support.StandardServletMultipartResolver"> ...