In this post, we'll learn how to integrate a Spring Boot application with a file storage service, such as Amazon Simple Storage Service (S3) or Google Drive.
We'll start by creating a new Spring Boot project and adding the required dependencies. Then, we'll configure the application to use the file storage service.
Finally, we'll write a simple controller to test the file storage integration.
First, we'll create a new Spring Boot project using the Spring Initializr. We'll name the project file-storage-service-integration
.
We'll select the following dependencies:
Next, we'll need to configure the application to use the file storage service.
To use Amazon S3, we'll need to add the following configuration to the application.properties
file:
cloud.aws.credentials.access-key=${accessKey}
cloud.aws.credentials.secret-key=${secretKey}
cloud.aws.region.static=${region}
cloud.aws.s3.bucket=${bucketName}
Replace ${accessKey}
, ${secretKey}
, ${region}
, and ${bucketName}
with the appropriate values for your Amazon S3 account.
To use Google Drive, we'll need to add the following configuration to the application.properties
file:
google.drive.credentials.file=${credentialsFile}
Replace ${credentialsFile}
with the path to the Google Drive credentials file.
Finally, we'll write a simple controller to test the file storage integration.
The following controller will upload a file to Amazon S3:
@Controller
public class S3Controller {
@Autowired
private AmazonS3 amazonS3;
@PostMapping("/s3/upload")
public String uploadFile(@RequestParam("file") MultipartFile file) {
String fileName = file.getOriginalFilename();
String contentType = file.getContentType();
amazonS3.putObject(new PutObjectRequest(bucketName, fileName, file.getInputStream(), new ObjectMetadata())
.withCannedAcl(CannedAccessControlList.PublicRead));
return "redirect:/";
}
}
In the controller, we inject the AmazonS3
bean and use it to upload the file to Amazon S3. We also set the Content-Type
header to the value of the file
parameter.
The following controller will upload a file to Google Drive:
@Controller
public class DriveController {
@Autowired
private Drive drive;
@PostMapping("/drive/upload")
public String uploadFile(@RequestParam("file") MultipartFile file) throws IOException {
File fileMetadata = new File();
fileMetadata.setName(file.getOriginalFilename());
fileMetadata.setMimeType(file.getContentType());
FileContent fileContent = new FileContent(file.getContentType(), file);
drive.files().create(fileMetadata, fileContent)
.setFields("id")
.execute();
return "redirect:/";
}
}
In the controller, we inject the Drive
bean and use it to upload the file to Google Drive. We also set the Content-Type
header to the value of the file
parameter.
To test the file storage integration, we'll need to start the application and upload a file.
To test the Amazon S3 integration, we'll need to start the application and upload a file to the /s3/upload
endpoint.
The file will be uploaded to Amazon S3 and a 200
status code will be returned.
To test the Google Drive integration, we'll need to start the application and upload a file to the /drive/upload
endpoint.
The file will be uploaded to Google Drive and a 200
status code will be returned.
In this post, we learned how to integrate a Spring Boot application with a file storage service, such as Amazon Simple Storage Service (S3) or Google Drive.
We started by creating a new Spring Boot project and adding the required dependencies. Then, we configured the application to use the file storage service.
Finally, we wrote a simple controller to test the file storage integration.