Spring MVC - Using javax.servlet.http.Part as handler method argument to handle file upload

This example shows how to use javax.servlet.http.Part as controller method parameter for uploading a file.

@Controller
@RequestMapping("/upload")
public class FileUploadController {
    public static final String TargetFolder = "d:/filesUploaded/";
    .............
    @PostMapping
    public String handlePostRequest(@RequestPart("user-file") Part part,
                                    Model model) throws IOException {

        String name = extractFileName(part);
        InputStream inputStream = part.getInputStream();
        Files.copy(inputStream, Paths.get(TargetFolder + name), StandardCopyOption.REPLACE_EXISTING);
        model.addAttribute("msg", "File has been uploaded:  " + name);
        return "response";
    }

    private String extractFileName(Part part) {
        String disposition = part.getHeader("Content-Disposition");
        String fileName = disposition
                .replaceFirst("(?i)^.*filename=\"?([^\"]+)\"?.*$", "$1");
        return fileName;
    }
}

Running example

mvn tomcat7:run-war

From browser access 'http://localhost:8080/upload', choose file to upload and submit. Your selected file will be saved under 'd:/filesUploaded/' directory.

Example Project

Dependencies and Technologies Used:

• spring-webmvc 5.0.3.RELEASE: Spring Web MVC.
• javax.servlet-api 3.0.1 Java Servlet API
• jstl 1.2 javax.servlet:jstl
• JDK 1.8
• Maven 3.3.9