基于SpringBoot實現(xiàn)大文件分塊上傳功能

更新時間：2024年09月06日 08:28:11 作者：HBLOG

這篇文章主要介紹了基于SpringBoot實現(xiàn)大文件分塊上傳功能,實現(xiàn)原理其實很簡單,核心就是客戶端把大文件按照一定規(guī)則進行拆分,比如20MB為一個小塊,分解成一個一個的文件塊,然后把這些文件塊單獨上傳到服務端,需要的朋友可以參考下

1.分塊上傳使用場景

大文件加速上傳：當文件大小超過100MB時，使用分片上傳可實現(xiàn)并行上傳多個Part以加快上傳速度。
網(wǎng)絡環(huán)境較差：網(wǎng)絡環(huán)境較差時，建議使用分片上傳。當出現(xiàn)上傳失敗的時候，您僅需重傳失敗的Part。
文件大小不確定: 可以在需要上傳的文件大小還不確定的情況下開始上傳，這種場景在視頻監(jiān)控等行業(yè)應用中比較常見。

2.實現(xiàn)原理

實現(xiàn)原理其實很簡單，核心就是客戶端把大文件按照一定規(guī)則進行拆分，比如20MB為一個小塊，分解成一個一個的文件塊，然后把這些文件塊單獨上傳到服務端，等到所有的文件塊都上傳完畢之后，客戶端再通知服務端進行文件合并的操作，合并完成之后整個任務結束。

3.代碼工程

實驗目的

實現(xiàn)大文件分塊上傳

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>springboot-demo</artifactId>
        <groupId>com.et</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>file</artifactId>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-core</artifactId>
            <version>5.8.15</version>
        </dependency>
    </dependencies>
</project>

controller

package com.et.controller;

import com.et.bean.Chunk;
import com.et.bean.FileInfo;
import com.et.service.ChunkService;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("file")
public class ChunkController {
    @Autowired
    private ChunkService chunkService;

    /**
     * upload by part
     *
     * @param chunk
     * @return
     */
    @PostMapping(value = "chunk")
    public ResponseEntity<String> chunk(Chunk chunk) {
        chunkService.chunk(chunk);
        return ResponseEntity.ok("File Chunk Upload Success");
    }

    /**
     * merge
     *
     * @param filename
     * @return
     */
    @GetMapping(value = "merge")
    public ResponseEntity<Void> merge(@RequestParam("filename") String filename) {
        chunkService.merge(filename);
        return ResponseEntity.ok().build();
    }


    /**
     * get fileName
     *
     * @return files
     */
    @GetMapping("/files")
    public ResponseEntity<List<FileInfo>> list() {
        return ResponseEntity.ok(chunkService.list());
    }

    /**
     * get single file
     *
     * @param filename
     * @return file
     */
    @GetMapping("/files/{filename:.+}")
    public ResponseEntity<Resource> getFile(@PathVariable("filename") String filename) {
        return ResponseEntity.ok().header(HttpHeaders.CONTENT_DISPOSITION,
                "attachment; filename=\"" + filename + "\"").body(chunkService.getFile(filename));
    }
}

config

package com.et.config;

import com.et.service.FileClient;
import com.et.service.impl.LocalFileSystemClient;

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

import java.util.HashMap;
import java.util.Map;
import java.util.function.Supplier;


@Configuration
public class FileClientConfig {
    @Value("${file.client.type:local-file}")
    private String fileClientType;

    private static final Map<String, Supplier<FileClient>> FILE_CLIENT_SUPPLY = new HashMap<String, Supplier<FileClient>>() {
        {
            put("local-file", LocalFileSystemClient::new);
           // put("aws-s3", AWSFileClient::new);
        }
    };

    /**
     * get client
     *
     * @return 
     */
    @Bean
    public FileClient fileClient() {
        return FILE_CLIENT_SUPPLY.get(fileClientType).get();
    }
}

service

package com.et.service;

import com.et.bean.Chunk;
import com.et.bean.FileInfo;

import org.springframework.core.io.Resource;

import java.util.List;


public interface ChunkService {

    void chunk(Chunk chunk);
    void merge(String filename);
    List<FileInfo> list();
    Resource getFile(String filename);
}

package com.et.service.impl;

import com.et.bean.Chunk;
import com.et.bean.ChunkProcess;
import com.et.bean.FileInfo;
import com.et.service.ChunkService;
import com.et.service.FileClient;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Service;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicBoolean;


@Service
@Slf4j
public class ChunkServiceImpl implements ChunkService {
    // process
    private static final Map<String, ChunkProcess> CHUNK_PROCESS_STORAGE = new ConcurrentHashMap<>();

    // file list
    private static final List<FileInfo> FILE_STORAGE = new CopyOnWriteArrayList<>();

    @Autowired
    private FileClient fileClient;

    @Override
    public void chunk(Chunk chunk) {
        String filename = chunk.getFilename();
        boolean match = FILE_STORAGE.stream().anyMatch(fileInfo -> fileInfo.getFileName().equals(filename));
        if (match) {
            throw new RuntimeException("File [ " + filename + " ] already exist");
        }
        ChunkProcess chunkProcess;
        String uploadId;
        if (CHUNK_PROCESS_STORAGE.containsKey(filename)) {
            chunkProcess = CHUNK_PROCESS_STORAGE.get(filename);
            uploadId = chunkProcess.getUploadId();
            AtomicBoolean isUploaded = new AtomicBoolean(false);
            Optional.ofNullable(chunkProcess.getChunkList()).ifPresent(chunkPartList ->
                    isUploaded.set(chunkPartList.stream().anyMatch(chunkPart -> chunkPart.getChunkNumber() == chunk.getChunkNumber())));
            if (isUploaded.get()) {
                log.info("file【{}】chunk【{}】upload，jump", chunk.getFilename(), chunk.getChunkNumber());
                return;
            }
        } else {
            uploadId = fileClient.initTask(filename);
            chunkProcess = new ChunkProcess().setFilename(filename).setUploadId(uploadId);
            CHUNK_PROCESS_STORAGE.put(filename, chunkProcess);
        }

        List<ChunkProcess.ChunkPart> chunkList = chunkProcess.getChunkList();
        String chunkId = fileClient.chunk(chunk, uploadId);
        chunkList.add(new ChunkProcess.ChunkPart(chunkId, chunk.getChunkNumber()));
        CHUNK_PROCESS_STORAGE.put(filename, chunkProcess.setChunkList(chunkList));
    }

    @Override
    public void merge(String filename) {
        ChunkProcess chunkProcess = CHUNK_PROCESS_STORAGE.get(filename);
        fileClient.merge(chunkProcess);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String currentTime = simpleDateFormat.format(new Date());
        FILE_STORAGE.add(new FileInfo().setUploadTime(currentTime).setFileName(filename));
        CHUNK_PROCESS_STORAGE.remove(filename);
    }

    @Override
    public List<FileInfo> list() {
        return FILE_STORAGE;
    }

    @Override
    public Resource getFile(String filename) {
        return fileClient.getFile(filename);
    }
}

package com.et.service.impl;

import com.et.bean.FileInfo;
import com.et.service.FileUploadService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Service;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;


@Service
@Slf4j
public class FileUploadServiceImpl implements FileUploadService {
    @Value("${upload.path:/data/upload/}")
    private String filePath;

    private static final List<FileInfo> FILE_STORAGE = new CopyOnWriteArrayList<>();

    @Override
    public void upload(MultipartFile[] files) {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        for (MultipartFile file : files) {
            String fileName = file.getOriginalFilename();
            boolean match = FILE_STORAGE.stream().anyMatch(fileInfo -> fileInfo.getFileName().equals(fileName));
            if (match) {
                throw new RuntimeException("File [ " + fileName + " ] already exist");
            }

            String currentTime = simpleDateFormat.format(new Date());
            try (InputStream in = file.getInputStream();
                 OutputStream out = Files.newOutputStream(Paths.get(filePath + fileName))) {
                FileCopyUtils.copy(in, out);
            } catch (IOException e) {
                log.error("File [{}] upload failed", fileName, e);
                throw new RuntimeException(e);
            }
            FileInfo fileInfo = new FileInfo().setFileName(fileName).setUploadTime(currentTime);
            FILE_STORAGE.add(fileInfo);
        }
    }

    @Override
    public List<FileInfo> list() {
        return FILE_STORAGE;
    }

    @Override
    public Resource getFile(String fileName) {
        FILE_STORAGE.stream()
                .filter(info -> info.getFileName().equals(fileName))
                .findFirst()
                .orElseThrow(() -> new RuntimeException("File [ " + fileName + " ] not exist"));
        File file = new File(filePath + fileName);
        return new FileSystemResource(file);
    }
}

以上只是一些關鍵代碼，所有代碼請參見下面代碼倉庫

代碼倉庫

https://github.com/Harries/springboot-demo（File）

4.測試

啟動Sprint Boot應用
編寫測試類

@Test
public void testUpload() throws Exception {
    String chunkFileFolder = "D:/tmp/";
    java.io.File file = new java.io.File("D:/SoftWare/oss-browser-win32-ia32.zip");
    long contentLength = file.length();
    // partSize:20MB
    long partSize = 20 * 1024 * 1024;
    // the last partSize may less  20MB
    long chunkFileNum = (long) Math.ceil(contentLength * 1.0 / partSize);
    RestTemplate restTemplate = new RestTemplate();

    try (RandomAccessFile raf_read = new RandomAccessFile(file, "r")) {
        // buffer
        byte[] b = new byte[1024];
        for (int i = 1; i <= chunkFileNum; i++) {
            // chunk
            java.io.File chunkFile = new java.io.File(chunkFileFolder + i);
            // write
            try (RandomAccessFile raf_write = new RandomAccessFile(chunkFile, "rw")) {
                int len;
                while ((len = raf_read.read(b)) != -1) {
                    raf_write.write(b, 0, len);
                    if (chunkFile.length() >= partSize) {
                        break;
                    }
                }
                // upload
                MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
                body.add("file", new FileSystemResource(chunkFile));
                body.add("chunkNumber", i);
                body.add("chunkSize", partSize);
                body.add("currentChunkSize", chunkFile.length());
                body.add("totalSize", contentLength);
                body.add("filename", file.getName());
                body.add("totalChunks", chunkFileNum);
                HttpHeaders headers = new HttpHeaders();
                headers.setContentType(MediaType.MULTIPART_FORM_DATA);
                HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);
                String serverUrl = "http://localhost:8080/file/chunk";
                ResponseEntity<String> response = restTemplate.postForEntity(serverUrl, requestEntity, String.class);
                System.out.println("Response code: " + response.getStatusCode() + " Response body: " + response.getBody());
            } finally {
                FileUtil.del(chunkFile);
            }
        }
    }
    // merge file
    String mergeUrl = "http://localhost:8080/file/merge?filename=" + file.getName();
    ResponseEntity<String> response = restTemplate.getForEntity(mergeUrl, String.class);
    System.out.println("Response code: " + response.getStatusCode() + " Response body: " + response.getBody());
}