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Spring Framework example source code file (PetDescriptionUploadController.java)

This example Spring Framework source code file (PetDescriptionUploadController.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

bytearraymultipartfileeditor, controller, modelattribute, pet, petdescriptionuploadcontroller, petservice, petservice, requestmapping, requestmapping, requestparam, sortedset, string, string, util, view

The Spring Framework PetDescriptionUploadController.java source code

package org.springframework.samples.petportal.portlet;

import java.util.SortedSet;

import org.springframework.samples.petportal.domain.Pet;
import org.springframework.samples.petportal.domain.PetDescription;
import org.springframework.samples.petportal.service.PetService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.support.ByteArrayMultipartFileEditor;

/**
 * This Controller demonstrates multipart file uploads. In this case, 
 * an uploaded text file will be used as the description for a Pet.
 * 
 * @author John A. Lewis
 * @author Mark Fisher
 * @author Juergen Hoeller
 */
@Controller
@RequestMapping("VIEW")
public class PetDescriptionUploadController {
	
	private PetService petService;
	
	public void setPetService(PetService petService) {
		this.petService = petService;
	}

	@ModelAttribute("pets")
	public SortedSet getPets() {
		return this.petService.getAllPets();
	}
	
	/**
	 * Register the PropertyEditor for converting from a MultipartFile to an array of bytes.
	 */
	@InitBinder
	public void registerMultipartEditor(WebDataBinder binder) {
		binder.registerCustomEditor(byte[].class, new ByteArrayMultipartFileEditor());
	}

	/**
	 * If there are no Pets, display the 'noPetsForUpload' view. 
	 * Otherwise show the upload form.
	 */
	@RequestMapping  // default render
	public String showUploadForm() {
		if (this.petService.getPetCount() > 0) {
			return "upload";
		}
		else {
			return "noPetsForUpload";
		}
	}

	/**
	 * On submit, set the description property for the selected Pet as a String.
	 */
	@RequestMapping  // default action
	public void processUpload(PetDescription upload, @RequestParam("selectedPet") int petKey) {
		byte[] file = upload.getFile();
		String description = new String(file);
		Pet pet = this.petService.getPet(petKey);
		pet.setDescription(description);
		this.petService.savePet(pet);
	}

}

Other Spring Framework examples (source code examples)

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