Java大文件分片上传(minio版)，超详细

本文使用spring boot 结合minio文件服务做的大文件分片上传，思路：①：初始化文件调用后端接口，后端再调用minio把文件分片成几份，生成每个分片的minio上传url②：把提起分片好的文件依次调用上一把返回的url ③：调用合并分片文件接口，完成上传 PS：文件并未经过后端服务器，而是直接上传到minio文件服务的

文章目录

• • 第一步：pom引入minio
  • 第二步：配置minio
  • 第三步：自定义minio客户端与工具类
  • 1. 自定义客户端
  • 2.封装minio配置
  • 3.上传工具类
  • 4.service
  • 5.service实现
  • 6.接口控制器
  • 第四步：文件切片
  • 第五步：示例截图

第一步：pom引入minio

 <!--minio大文件上传--><dependency><groupId>io.minio</groupId><artifactId>minio</artifactId><version>8.0.3</version></dependency>

第二步：配置minio

# minio 配置（大文件分片上传使用）minio:endpoint: ${MINIO_ENDPOINT:http://minio服务IP:端口号}accesskey: ${MINIO_ASSESSKEY:密钥}secretkey: ${MINIO_SECRETKEY:密匙}bucket: ${MINIO_BUCKET:桶名称}

第三步：自定义minio客户端与工具类

1. 自定义客户端

package com.gcddd.visual.uav.largeFileUpload.util;import com.google.common.collect.Multimap;import io.minio.CreateMultipartUploadResponse;import io.minio.ListPartsResponse;import io.minio.MinioClient;import io.minio.ObjectWriteResponse;import io.minio.errors.*;import io.minio.messages.Part;import java.io.IOException;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;/** * 自定义minio * @date 2023-09-15 */public class CustomMinioClient extends MinioClient {public CustomMinioClient(MinioClient client) {super(client);}public String initMultiPartUpload(String bucket, String region, String object, Multimap<String, String> headers, Multimap<String, String> extraQueryParams) throws IOException, InvalidKeyException, NoSuchAlgorithmException, InsufficientDataException, ServerException, InternalException, XmlParserException, InvalidResponseException, ErrorResponseException {CreateMultipartUploadResponse response = this.createMultipartUpload(bucket, region, object, headers, extraQueryParams);return response.result().uploadId();}public ObjectWriteResponse mergeMultipartUpload(String bucketName, String region, String objectName, String uploadId, Part[] parts, Multimap<String, String> extraHeaders, Multimap<String, String> extraQueryParams) throws IOException, InvalidKeyException, NoSuchAlgorithmException, InsufficientDataException, ServerException, InternalException, XmlParserException, InvalidResponseException, ErrorResponseException {return this.completeMultipartUpload(bucketName, region, objectName, uploadId, parts, extraHeaders, extraQueryParams);}public ListPartsResponse listMultipart(String bucketName, String region, String objectName, Integer maxParts, Integer partNumberMarker, String uploadId, Multimap<String, String> extraHeaders, Multimap<String, String> extraQueryParams) throws NoSuchAlgorithmException, InsufficientDataException, IOException, InvalidKeyException, ServerException, XmlParserException, ErrorResponseException, InternalException, InvalidResponseException {return this.listParts(bucketName, region, objectName, maxParts, partNumberMarker, uploadId, extraHeaders, extraQueryParams);}}

2.封装minio配置

package com.gcddd.visual.uav.largeFileUpload.configurer;import lombok.Getter;import lombok.Setter;import org.springframework.boot.context.properties.ConfigurationProperties;/** * @Description: MinioProperties * minio配置类 */@ConfigurationProperties(prefix = "minio")@Getter@Setterpublic class MinioProperties {private String endpoint;private String accesskey;private String secretkey;private String bucket;}

3.上传工具类

package com.gcddd.visual.uav.largeFileUpload.configurer;import cn.hutool.core.util.StrUtil;import com.gcddd.visual.uav.largeFileUpload.util.CustomMinioClient;import com.google.common.collect.HashMultimap;import io.minio.*;import io.minio.http.Method;import io.minio.messages.Part;import org.springframework.boot.context.properties.EnableConfigurationProperties;import org.springframework.context.annotation.Configuration;import org.springframework.stereotype.Component;import javax.annotation.PostConstruct;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import java.util.concurrent.TimeUnit;/*** @Description: MinIoUtils * 工具类 */@Component@Configuration@EnableConfigurationProperties({MinioProperties.class})public class MinIoUtils {private final MinioProperties minioProperties;private CustomMinioClient customMinioClient;public MinIoUtils(MinioProperties minioProperties) {this.minioProperties = minioProperties;}@PostConstructpublic void init() {MinioClient minioClient = MinioClient.builder().endpoint(minioProperties.getEndpoint()).credentials(minioProperties.getAccesskey(), minioProperties.getSecretkey()).build();customMinioClient = new CustomMinioClient(minioClient);}/** * 单文件签名上传 * * @param objectName 文件全路径名称 * @return / */public String getUploadObjectUrl(String objectName) {try {return customMinioClient.getPresignedObjectUrl(GetPresignedObjectUrlArgs.builder().method(Method.PUT).bucket(minioProperties.getBucket()).object(objectName).expiry(1, TimeUnit.DAYS)//.extraHeaders(headers).build());} catch (Exception e) {e.printStackTrace();return null;}}/** *初始化分片上传 * * @param objectName 文件全路径名称 * @param partCount 分片数量 * @param contentType 类型，如果类型使用默认流会导致无法预览 * @return / */public Map<String, Object> initMultiPartUpload(String objectName, int partCount, String contentType) {Map<String, Object> result = new HashMap<>();try {if (StrUtil.isBlank(contentType)) {contentType = "application/octet-stream";}HashMultimap<String, String> headers = HashMultimap.create();headers.put("Content-Type", contentType);String uploadId = customMinioClient.initMultiPartUpload(minioProperties.getBucket(), null, objectName, headers, null);result.put("uploadId", uploadId);List<String> partList = new ArrayList<>();Map<String, String> reqParams = new HashMap<>();//reqParams.put("response-content-type", "application/json");reqParams.put("uploadId", uploadId);for (int i = 1; i <= partCount; i++) {reqParams.put("partNumber", String.valueOf(i));String uploadUrl = customMinioClient.getPresignedObjectUrl(GetPresignedObjectUrlArgs.builder().method(Method.PUT).bucket(minioProperties.getBucket()).object(objectName).expiry(1, TimeUnit.DAYS).extraQueryParams(reqParams).build());partList.add(uploadUrl);}result.put("uploadUrls", partList);} catch (Exception e) {e.printStackTrace();return null;}return result;}/** * 分片上传完后合并 * * @param objectName 文件全路径名称 * @param uploadId 返回的uploadId * @return / */public boolean mergeMultipartUpload(String objectName, String uploadId) {try {//TODO::目前仅做了最大1000分片Part[] parts = new Part[1000];ListPartsResponse partResult = customMinioClient.listMultipart(minioProperties.getBucket(), null, objectName, 1000, 0, uploadId, null, null);int partNumber = 1;for (Part part : partResult.result().partList()) {parts[partNumber - 1] = new Part(partNumber, part.etag());partNumber++;}customMinioClient.mergeMultipartUpload(minioProperties.getBucket(), null, objectName, uploadId, parts, null, null);} catch (Exception e) {e.printStackTrace();return false;}return true;}}

4.service

package com.gcddd.visual.uav.largeFileUpload.service;import java.util.Map;/** * @date 2023-09-13 */public interface UploadService {/** * 分片上传初始化 * * @param path路径 * @param filename文件名 * @param partCount 分片数量 * @param contentType / * @return / */Map<String, Object> initMultiPartUpload(String path, String filename, Integer partCount, String contentType);/** * 完成分片上传 * * @param objectName 文件名 * @param uploadId 标识 * @return / */ boolean mergeMultipartUpload(String objectName, String uploadId);}

5.service实现

package com.gcddd.visual.uav.largeFileUpload.service.impl;import com.gcddd.visual.uav.largeFileUpload.configurer.MinIoUtils;import com.gcddd.visual.uav.largeFileUpload.service.UploadService;import com.google.common.collect.ImmutableList;import com.google.common.collect.ImmutableMap;import lombok.RequiredArgsConstructor;import org.springframework.stereotype.Service;import java.util.Map;/** * @date 2023-09-13 */@Service@RequiredArgsConstructorpublic class UploadServiceImpl implements UploadService {private final MinIoUtils minIoUtils;@Overridepublic Map<String, Object> initMultiPartUpload(String path, String filename, Integer partCount, String contentType) {path = path.replaceAll("/+", "/");if (path.indexOf("/") == 0) {path = path.substring(1);}String filePath = path + "/" + filename;Map<String, Object> result;// 单文件，直接上传if (partCount == 1) {String uploadObjectUrl = minIoUtils.getUploadObjectUrl(filePath);result = ImmutableMap.of("uploadUrls", ImmutableList.of(uploadObjectUrl));} else {//多文件，分片上传result = minIoUtils.initMultiPartUpload(filePath, partCount, contentType);}return result;}@Overridepublic boolean mergeMultipartUpload(String objectName, String uploadId) {return minIoUtils.mergeMultipartUpload(objectName, uploadId);}}

6.接口控制器

import cn.hutool.core.lang.Assert;import cn.hutool.json.JSONObject;import com.gcddd.visual.uav.largeFileUpload.service.UploadService;import com.gcddd.visual.uav.util.DateUtils;import com.google.common.collect.ImmutableMap;import io.swagger.v3.oas.annotations.security.SecurityRequirement;import io.swagger.v3.oas.annotations.tags.Tag;import lombok.RequiredArgsConstructor;import org.springframework.http.HttpHeaders;import org.springframework.http.HttpStatus;import org.springframework.http.ResponseEntity;import org.springframework.web.bind.annotation.*;import java.util.Map;/** * 大文件上传控制器 */@RestController@RequiredArgsConstructor@RequestMapping("/largeFileUpload" )@Tag(description = "largeFileUpload" , name = "大文件分片上传" )@SecurityRequirement(name = HttpHeaders.AUTHORIZATION)public class uploadController {private final UploadService uploadService;//1.用户调用初始化接口，后端调用minio初始化，得到uploadId，生成每个分片的minio上传url//初始化 示例： $ curl --location --request POST 'http://127.0.0.1:9998/admin/largeFileUpload/multipart/init' \//--header 'Content-Type: application/json' \//--data-raw '{//"filename": "result.png",//"partCount": 2//}'//返回示例：//{//"uploadId": "eb163e3d-bbf5-48ae-aa56-85cf2a3c0fa3",//"uploadUrls": [//"http://ip:端口号/uav/20230913/result.png" />//"http://ip:端口号/uav/20230913/result.png?uploadId=eb163e3d-bbf5-48ae-aa56-85cf2a3c0fa3&partNumber=2&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=lengleng%2F20230913%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20230913T031427Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=60d31989b9dc3bdacf6bbc9c13cb5c982f79b1e3a0bbcb948e0ec90fede2f9f3"//]//}//2.用户调用对应分片的上传地址，多次上传会覆盖//示例：//curl --location --request PUT 'http://ip:端口号/uav/20230913/result.png?uploadId=eb163e3d-bbf5-48ae-aa56-85cf2a3c0fa3&partNumber=1&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=lengleng%2F20230913%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20230913T031427Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=9e7bd28d6f4d42d0ed447750cadcd8782ccc2648a66ecb25a1e7639593ad7dd6' \//--header 'Content-Type: application/octet-stream' \//--data-binary '@/D:/jpgone'//curl --location --request PUT 'http://ip:端口号/uav/20230913/result.png?uploadId=eb163e3d-bbf5-48ae-aa56-85cf2a3c0fa3&partNumber=2&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=lengleng%2F20230913%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20230913T031427Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=60d31989b9dc3bdacf6bbc9c13cb5c982f79b1e3a0bbcb948e0ec90fede2f9f3' \//--header 'Content-Type: application/octet-stream' \//--data-binary '@/D:/jpgtwo'//3.调用完成接口，后端查询所有上传的分片并合并，uploadId为第一步返回的uploadId//示例：//curl --location --request PUT '127.0.0.1:8006/multipart/complete' \//--header 'Content-Type: application/json' \//--data-raw '{//"objectName":"20230913/result.png",//"uploadId":"eb163e3d-bbf5-48ae-aa56-85cf2a3c0fa3"//}'/** * 分片初始化 * * @param requestParam 请求参数 * @return / */@PostMapping("/multipart/init")public ResponseEntity<Object> initMultiPartUpload(@RequestBody JSONObject requestParam) {// 路径（存入minio的路径）String pathText = DateUtils.getTodays("yyyyMMdd");//当前日期String path = requestParam.getStr("path", pathText);// 文件名String filename = requestParam.getStr("filename", "test.obj");// content-typeString contentType = requestParam.getStr("contentType", "application/octet-stream");// md5-可进行秒传判断String md5 = requestParam.getStr("md5", "");// 分片数量Integer partCount = requestParam.getInt("partCount", 100);//TODO::业务判断+秒传判断Map<String, Object> result = uploadService.initMultiPartUpload(path, filename, partCount, contentType);return new ResponseEntity<>(result, HttpStatus.OK);}/** * 合并分片文件，完成上传 * * @param requestParam 用户参数 * @return / */@PutMapping("/multipart/complete")public ResponseEntity<Object> completeMultiPartUpload(@RequestBody JSONObject requestParam) {// 文件名完整路径String objectName = requestParam.getStr("objectName");//初始化返回的uploadIdString uploadId = requestParam.getStr("uploadId");Assert.notNull(objectName, "objectName must not be null");Assert.notNull(uploadId, "uploadId must not be null");boolean result = uploadService.mergeMultipartUpload(objectName, uploadId);return new ResponseEntity<>(ImmutableMap.of("success", result), HttpStatus.OK);}}

第四步：文件切片

把result.png图片以500M大小切片，重命名为result.png.后缀

split -b 500m result.png result.png.

第五步：示例截图

这里测试为把result.png切为2片，返回了uploadId 和两个minio文件上传地址

分片上传的地址上传文件，请求方式为put

合并文件，完成上传

检查minio是否成功