好的，下面是一个基于 Spring Boot 和 MinIO 实现文件分片上传、断点续传、秒传的示例代码：
@RestController
@RequestMapping("/file")
public class FileController {
private final MinioClient minioClient;
@Autowired
public FileController(MinioClient minioClient) {
this.minioClient = minioClient;
}
@PostMapping("/upload")
public ResponseEntity<String> upload(@RequestParam("file") MultipartFile file) throws Exception {
String md5 = DigestUtils.md5Hex(file.getInputStream());
String objectName = md5 + "/" + file.getOriginalFilename();
boolean objectExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket("my-bucket").build());
if (!objectExists) {
minioClient.makeBucket(MakeBucketArgs.builder().bucket("my-bucket").build());
}
if (minioClient.objectExists(ObjectExistsArgs.builder().bucket("my-bucket").object(objectName).build())) {
return ResponseEntity.ok("秒传成功");
}
int partSize = 5 * 1024 * 1024;
long objectSize = file.getSize();
int partCount = (int) Math.ceil(objectSize / (double) partSize);
List<PartETag> partETags = new ArrayList<>(partCount);
InputStream inputStream = file.getInputStream();
for (int i = 0; i < partCount; i++) {
long offset = i * partSize;
long size = Math.min(partSize, objectSize - offset);
UploadPartArgs uploadPartArgs = UploadPartArgs.builder()
.bucket("my-bucket")
.object(objectName)
.uploadId(md5)
.partNumber(i + 1)
.partSize(size)
.stream(inputStream, size, offset)
.build();
partETags.add(minioClient.uploadPart(uploadPartArgs));
}
CompleteMultipartUploadArgs completeMultipartUploadArgs = CompleteMultipartUploadArgs.builder()
.bucket("my-bucket")
.object(objectName)
.uploadId(md5)
.partETags(partETags)
.build();
minioClient.completeMultipartUpload(completeMultipartUploadArgs);
return ResponseEntity.ok("上传成功");
}
@GetMapping("/download")
public ResponseEntity<InputStreamResource> download(@RequestParam("filename") String filename) throws Exception {
String md5 = DigestUtils.md5Hex(new ByteArrayInputStream(filename.getBytes()));
String objectName = md5 + "/" + filename;
boolean objectExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket("my-bucket").build());
if (!objectExists) {
return ResponseEntity.notFound().build();
}
boolean objectPartExists = minioClient.objectExists(ObjectExistsArgs.builder().bucket("my-bucket").object(objectName).build());
if (!objectPartExists) {
return ResponseEntity.notFound().build();
}
GetObjectArgs getObjectArgs = GetObjectArgs.builder()
.bucket("my-bucket")
.object(objectName)
.build();
InputStream inputStream = minioClient.getObject(getObjectArgs);
InputStreamResource inputStreamResource = new InputStreamResource(inputStream);
return ResponseEntity.ok()
.header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + filename + "\"")
.contentLength(inputStream.available())
.body(inputStreamResource);
}
@GetMapping("/resume")
public ResponseEntity<String> resume(@RequestParam("file") MultipartFile file) throws Exception {
String md5 = DigestUtils.md5Hex(file.getInputStream());
String objectName = md5 + "/" + file.getOriginalFilename();
boolean objectExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket("my-bucket").build());
if (!objectExists) {
return ResponseEntity.notFound().build();
}
boolean objectPartExists = minioClient.objectExists(ObjectExistsArgs.builder().bucket("my-bucket").object(objectName).build());
if (!objectPartExists) {
return ResponseEntity.notFound().build();
}
int partSize = 5 * 1024 * 1024;
long objectSize = file.getSize();
int partCount = (int) Math.ceil(objectSize / (double) partSize);
List<PartETag> partETags = new ArrayList<>(partCount);
InputStream inputStream = file.getInputStream();
for (int i = 0; i < partCount; i++) {
long offset = i * partSize;
long size = Math.min(partSize, objectSize - offset);
UploadPartArgs uploadPartArgs = UploadPartArgs.builder()
.bucket("my-bucket")
.object(objectName)
.uploadId(md5)
.partNumber(i + 1)
.partSize(size)
.stream(inputStream, size, offset)
.build();
partETags.add(minioClient.uploadPart(uploadPartArgs));
}
CompleteMultipartUploadArgs completeMultipartUploadArgs = CompleteMultipartUploadArgs.builder()
.bucket("my-bucket")
.object(objectName)
.uploadId(md5)
.partETags(partETags)
.build();
minioClient.completeMultipartUpload(completeMultipartUploadArgs);
return ResponseEntity.ok("续传成功");
}
}
在上面的代码中，我们使用了MinioClient来连接到 MinIO 服务器，实现了文件的上传、下载和续传功能。
上传文件时，我们首先计算出文件的 MD5 值，然后将 MD5 值作为文件夹名称，将上传的文件保存在该文件夹下。如果该文件已经存在于 MinIO 服务器上，则直接返回秒传成功，否则我们将文件分成若干个分片进行上传，最后将分片合并成一个完整的文件。
下载文件时，我们先计算出文件的 MD5 值，然后将 MD5 值作为文件夹名称，从该文件夹下下载指定的文件。
续传文件时，我们先计算出文件的 MD5 值，然后判断该文件是否已经存在于 MinIO 服务器上。如果存在，则按照上传文件的方式进行续传，否则返回文件不存在的错误信息。
需要注意的是，在实际使用中，您需要将代码中的my-bucket替换成您自己的 Bucket 名称，并且确保 MinIO 服务器已经正确地配置和启动。
好的，下面是一个简单的 Vue3 代码示例，实现了文件分片上传和断点续传的功能。
<template>
<div>
<input type="file" @change="onFileChange" />
<button @click="upload">上传</button>
</div>
</template>
<script>
import axios from 'axios';
export default {
data() {
return {
file: null,
uploaded: 0,
total: 0,
progress: 0,
chunkSize: 1024 * 1024,
chunks: [],
uploadedChunks: [],
};
},
methods: {
onFileChange(event) {
this.file = event.target.files[0];
this.total = this.file.size;
const chunksCount = Math.ceil(this.total / this.chunkSize);
for (let i = 0; i < chunksCount; i++) {
const start = i * this.chunkSize;
const end = Math.min(start + this.chunkSize, this.total);
const chunk = this.file.slice(start, end);
this.chunks.push(chunk);
this.uploadedChunks.push(false);
}
},
async upload() {
const config = {
onUploadProgress: (progressEvent) => {
this.uploaded = progressEvent.loaded;
this.progress = Math.round((progressEvent.loaded * 100) / progressEvent.total);
},
};
const url = 'http://localhost:8080/upload';
for (let i = 0; i < this.chunks.length; i++) {
if (this.uploadedChunks[i]) {
continue;
}
const formData = new FormData();
formData.append('file', this.chunks[i]);
formData.append('index', i.toString());
formData.append('chunksCount', this.chunks.length.toString());
await axios.post(url, formData, config);
this.uploadedChunks[i] = true;
}
console.log('上传完成');
},
},
};
</script>
这个示例中，我们使用了 axios 库来发送上传文件的请求。在 onFileChange 方法中，我们将文件分成了多个大小相同的块，并将它们存储在 chunks 数组中。我们还创建了一个 uploadedChunks 数组来跟踪哪些块已经上传完成。
在 upload 方法中，我们循环遍历块数组，并使用 FormData 对象将每个块上传到服务器。在上传过程中，我们使用 onUploadProgress 回调来跟踪上传进度，并更新 uploaded 和 progress 变量。
请注意，这里的代码只是一个示例，您需要根据您的具体需求进行修改。如果您需要更详细的代码示例或者教程，请告诉我。