heroku上的spring boot get文件

import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;

@RestController
public class FileController {

    @GetMapping(value = "/file", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
    public ResponseEntity<Resource> getFile() throws IOException {
        Resource resource = new ClassPathResource("static/sample.txt");
        return ResponseEntity.ok()
                .contentType(MediaType.APPLICATION_OCTET_STREAM)
                .body(resource);
    }
}

git init
git add .
git commit -m "Initial commit"

heroku git:remote -a your-heroku-app-name

<build>
    <plugins>
        <plugin>
            <groupId>com.heroku.sdk</groupId>
            <artifactId>heroku-maven-plugin</artifactId>
            <version>3.0.4</version>
        </plugin>
    </plugins>
</build>

mvn clean heroku:deploy

curl -O https://your-heroku-app.herokuapp.com/file

https://your-heroku-app.herokuapp.com/file