I want to upload a image to the file system. So I am using Multi-part file upload with spring boot. And also I am using Advance Rest Client(Chrome) tool to POST Multi part file. But I am facing an error even I do not specify any content type org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found.

Here my rest controller code,

@RestController
public class StringController {
@RequestMapping(value="/upload", method=RequestMethod.POST)
public @ResponseBody String singleSave(@RequestParam("file") MultipartFile file){

    String fileName = null;
    if (!file.isEmpty()) {
        try {
            fileName = file.getOriginalFilename();
            byte[] bytes = file.getBytes();
            BufferedOutputStream buffStream = 
                    new BufferedOutputStream(new FileOutputStream(new File("F:/" + fileName)));
            buffStream.write(bytes);
            buffStream.close();
            return "You have successfully uploaded " + fileName;
        } catch (Exception e) {
            return "You failed to upload " + fileName + ": " + e.getMessage();
        }
    } else {
        return "Unable to upload. File is empty.";
    }
  }
}

Screenshot (Advance rest client tool)

Error

{ "timestamp": 1490678908517, "status": 500, "error": "Internal Server Error", "exception": "org.springframework.web.multipart.MultipartException", "message": "Could not parse multipart servlet request; nested exception is java.io.IOException: org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found", "path": "/upload" }