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

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
@Setter
public 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;
    }

    @PostConstruct
    public 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
@RequiredArgsConstructor
public class UploadServiceImpl implements UploadService {

    private final MinIoUtils minIoUtils;

    @Override
    public 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;
    }

    @Override
    public 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?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",
//            "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-type
        String 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uploadId
        String 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
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