To enible chunked upload, instant transfer, and resume capabilities using Spring Boot with MinIO, follow these implementation steps:

Add the MinIO dependency to your pom.xml configuration:

<dependency>
    <groupId>io.minio</groupId>
    <artifactId>minio</artifactId>
    <version>8.3.0</version>
</dependency>

Configure MinIO connection properties in application.properties or application.yml:

minio.server-url=http://localhost:9000
minio.access-key=your_access_key
minio.private-key=your_secret_key

Create a configuration class to initialize the MinIO client:

import io.minio.MinioClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MinioConfiguration {

    @Value("${minio.server-url}")
    private String serverUrl;

    @Value("${minio.access-key}")
    private String accessKey;

    @Value("${minio.private-key}")
    private String privateKey;

    @Bean
    public MinioClient createMinioClient() {
        return MinioClient.builder()
                .endpoint(serverUrl)
                .credentials(accessKey, privateKey)
                .build();
    }
}

Develop a controller to handle chunked uploads, instant transfers, and resume operations:

import io.minio.MinioClient;
import io.minio.PutObjectArgs;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.util.HashMap;
import java.util.Map;

@RestController
@RequestMapping("/file-transfer")
public class TransferController {

    @Autowired
    private MinioClient minioClient;

    @PostMapping("/fragment")
    public ResponseEntity<String> handleFragmentUpload(@RequestParam("data") MultipartFile data,
                                                       @RequestParam("fragmentIndex") int fragmentIndex,
                                                       @RequestParam("fragmentTotal") int fragmentTotal,
                                                       @RequestParam("transferId") String transferId) {
        try {
            String fileName = transferId + "_" + fragmentIndex;
            PutObjectArgs args = PutObjectArgs.builder()
                    .bucket("storage-bucket")
                    .object(fileName)
                    .stream(data.getInputStream(), data.getSize(), -1)
                    .build();
            minioClient.putObject(args);

            return ResponseEntity.ok("Fragment uploaded successfully");
        } catch (Exception exception) {
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                    .body("Fragment upload failed");
        }
    }

    @GetMapping("/status")
    public ResponseEntity<Map<String, Object>> getTransferStatus(@RequestParam("transferId") String transferId) {
        Map<String, Object> response = new HashMap<>();
        try {
            // Verify completion status of all fragments
            // ...

            response.put("state", "finished");
            return ResponseEntity.ok(response);
        } catch (Exception exception) {
            response.put("state", "pending");
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(response);
        }
    }
}

For frontend implemantation, utilize JavaScript's Blob.slice() method to divide files into fragments. Use XMLHttpRequest or fetch API to transmit individual fragmenst. Implement resume functionality to continue transfers from the last successful fragment after network interruptions.