Important things in File Upload in Spring MVC

File Upload in Spring MVC

Different & important pieces of codes for File Upload in Spring MVC

/** Form Coding in JSP **/
<form action="upload" method="post" enctype="multipart/form-data">
		<input type="file" name="file" /> <input type="submit" value="submit" />
</form>

/** Code to handle file upload **/
@RequestMapping(value="/upload")
	public ModelAndView upload(@RequestParam("file") MultipartFile file,
            RedirectAttributes redirectAttributes) throws IOException{
		System.out.println(file.getOriginalFilename());\
		return new ModelAndView("uploadSuccess");
}

/** pom.xml **/
<!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
<dependency>
  <groupId>commons-fileupload</groupId>
	<artifactId>commons-fileupload</artifactId>
	<version>1.3</version>
</dependency>
    
/** MvcConfiguration if Config done using annotation**/

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@ComponentScan(basePackages="com.digitalnative.attempts.SpringMVC")
@EnableWebMvc
public class MvcConfiguration extends WebMvcConfigurerAdapter{

	@Bean
	public ViewResolver getViewResolver(){
		InternalResourceViewResolver resolver = new InternalResourceViewResolver();
		resolver.setPrefix("/WEB-INF/views/");
		resolver.setSuffix(".jsp");
		return resolver;
	}
	
	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
	}

	@Bean
	public CommonsMultipartResolver multipartResolver() {
	    CommonsMultipartResolver resolver=new CommonsMultipartResolver();
	    resolver.setDefaultEncoding("utf-8");
	    return resolver;
	}	
}

/** If config is XML based **/
 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
 
/** JSTL required **/

/** pom.xml **/
<dependency>
  <groupId>jstl</groupId>
	<artifactId>jstl</artifactId>
	<version>1.2</version>
</dependency>

/** In JSP file **/
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>