callicoder/spring-boot-file-upload-download-rest-api-example

Spring Boot File Upload / Download Rest API Example

Spring Boot File Upload / Download Rest API Example

Tutorial: Uploading an Downloading files with Spring Boot

Steps to Setup

1. Clone the repository

git clone https://github.com/callicoder/spring-boot-file-upload-download-rest-api-example.git

2. Specify the file uploads directory

Open src/main/resources/application.properties file and change the property file.upload-dir to the path where you want the uploaded files to be stored.

file.upload-dir=/Users/callicoder/uploads

2. Run the app using maven

cd spring-boot-file-upload-download-rest-api-example
mvn spring-boot:run

That's it! The application can be accessed at http://localhost:8080.

You may also package the application in the form of a jar and then run the jar file like so -

mvn clean package
java -jar target/file-demo-0.0.1-SNAPSHOT.jar

spring-boot-file-upload-download-rest-api-example's Issues

db creation script

do we have db schema defined?

Problem with reading request param

Question about the controller

Sorry if I am completely wrong here but I have recently needed to learn the Spring Boot framework for work. I have Java experience but all of my web server stuff has been in Go.

That said I was looking at this line

spring-boot-file-upload-download-rest-api-example/src/main/java/com/example/filedemo/controller/FileController.java

Lines 32 to 51 in f3522aa

	@PostMapping("/uploadFile")
	public UploadFileResponse uploadFile(@RequestParam("file") MultipartFile file) {
	DBFile dbFile = DBFileStorageService.storeFile(file);
	String fileDownloadUri = ServletUriComponentsBuilder.fromCurrentContextPath()
	.path("/downloadFile/")
	.path(dbFile.getId())
	.toUriString();
	return new UploadFileResponse(dbFile.getFileName(), fileDownloadUri,
	file.getContentType(), file.getSize());
	}
	@PostMapping("/uploadMultipleFiles")
	public List<UploadFileResponse> uploadMultipleFiles(@RequestParam("files") MultipartFile[] files) {
	return Arrays.asList(files)
	.stream()
	.map(file -> uploadFile(file))
	.collect(Collectors.toList());
	}

Couldn't that be overloaded like this?

  @PostMapping(value = "/upload", params = {"file"})
  public UploadFileResponse uploadFile(@RequestParam MultipartFile file) {
    FileInstance fileInstance = fileStorageService.storeFile(file);

    String fileDownloadUri = ServletUriComponentsBuilder.fromCurrentContextPath()
      .path("/downloadFile/")
      .path(fileInstance.getId())
      .toUriString();
    
    return new UploadFileResponse(fileInstance.getFileName(), fileDownloadUri,
      file.getContentType(), file.getSize());
  }

  @PostMapping(value = "/upload", params = {"files"})
  public List<UploadFileResponse> uploadFile(@RequestParam MultipartFile[] files) {
    return Arrays.asList(files)
      .stream()
      .map(file -> uploadFile(file))
      .collect(Collectors.toList());
  }

If I am understanding things correctly that should allow a single endpoint to be used and it would auto use the correct upload?