springboot+vue实现分片上传

一、后端代码

	// 存放文件位置的绝对路径
	@Value("${d1.upload.file.path}")
    private String filePath;
    // 存放临时文件位置的绝对路径
    @Value("${d1.upload.file.temp}")
    private String filePathTemp;

    /**
     * @Author: Admin_X
     * @Date: 2022/4/26 15:35
     * @Param request 请求
     * @Param chunk  每一块
     * @Description: 上传每一块到临时目录       
     */
    @RequestMapping(method = RequestMethod.POST)
    public String upload(HttpServletRequest request, Chunk chunk) throws IOException {
        System.out.println("开始时间:"+System.currentTimeMillis());
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);
        if (isMultipart) {
            MultipartFile file = chunk.getFile();
            if (file == null) {
                return "参数校验失败";
            }
            Integer chunkNumber = chunk.getChunkNumber();
            if (chunkNumber == null) {
                chunkNumber = 0;
            }
            File outFile = new File(filePathTemp + File.separator + chunk.getIdentifier(), chunkNumber + ".part");
            InputStream inputStream = file.getInputStream();
            FileUtils.copyInputStreamToFile(inputStream, outFile);
        }
        System.out.println("结束时间:"+System.currentTimeMillis());
        return "上传成功";
    }

    /**
     * @Author: Admin_X
     * @Date: 2022/4/26 15:35
     * @Param filename 文件名
     * @Param guid 每一块的唯一id
     * @Description: 合并所有分片          
     */
    @GetMapping("/merge")
    public String mergeFile(String filename, String guid) throws Exception {
        File file = new File(filePathTemp + File.separator + guid);
        if (file.isDirectory()) {
            File[] files = file.listFiles();
            if (files != null && files.length > 0) {
                File partFile = new File(filePath + File.separator + filename);
                for (int i = 1; i <= files.length; i++) {
                    File s = new File(filePathTemp + File.separator + guid, i + ".part");
                    FileOutputStream destTempfos = new FileOutputStream(partFile, true);
                    FileUtils.copyFile(s, destTempfos);
                    destTempfos.close();
                }
                // 删除文件夹下的所有内容
                FileUtils.deleteDirectory(file);
                // 删除当前文件夹
                FileUtils.deleteDirectory(new File(filePathTemp));
            }
        }
        return "上传失败";
    }

二、前端代码

上传页面 uploader.vue

<template>
  <div class="uploader">
    <slot :files="files" :file-list="fileList" :started="started">
      <uploader-unsupport>uploader-unsupport>
      <uploader-drop>
        <p>将文件拖放到此处以上传或p>
        <uploader-btn>上传文件uploader-btn>
        <uploader-btn :directory="true">上传文件夹uploader-btn>
      uploader-drop>
      <uploader-list>uploader-list>
    slot>
  div>
template>

<script>
  import Uploader from 'simple-uploader.js'
  import { kebabCase } from '../common/utils'
  import UploaderBtn from './btn.vue'
  import UploaderDrop from './drop.vue'
  import UploaderUnsupport from './unsupport.vue'
  import UploaderList from './list.vue'
  import UploaderFiles from './files.vue'
  import UploaderFile from './file.vue'

  const COMPONENT_NAME = 'uploader'
  const FILE_ADDED_EVENT = 'fileAdded'
  const FILES_ADDED_EVENT = 'filesAdded'
  const UPLOAD_START_EVENT = 'uploadStart'

  export default {
    name: COMPONENT_NAME,
    provide () {
      return {
        uploader: this
      }
    },
    props: {
      options: {
        type: Object,
        default () {
          return {}
        }
      },
      autoStart: {
        type: Boolean,
        default: true
      },
      fileStatusText: {
        type: [Object, Function],
        default () {
          return {
            success: 'success',
            error: 'error',
            uploading: 'uploading',
            paused: 'paused',
            waiting: 'waiting'
          }
        }
      }
    },
    data () {
      return {
        started: false,
        files: [],
        fileList: []
      }
    },
    methods: {
      uploadStart () {
        this.started = true
      },
      fileAdded (file) {
        this.$emit(kebabCase(FILE_ADDED_EVENT), file)
        if (file.ignored) {
          // is ignored, filter it
          return false
        }
      },
      filesAdded (files, fileList) {
        this.$emit(kebabCase(FILES_ADDED_EVENT), files, fileList)
        if (files.ignored || fileList.ignored) {
          // is ignored, filter it
          return false
        }
      },
      fileRemoved (file) {
        this.files = this.uploader.files
        this.fileList = this.uploader.fileList
      },
      filesSubmitted (files, fileList) {
        this.files = this.uploader.files
        this.fileList = this.uploader.fileList
        if (this.autoStart) {
          this.uploader.upload()
        }
      },
      allEvent (...args) {
        const name = args[0]
        const EVENTSMAP = {
          [FILE_ADDED_EVENT]: true,
          [FILES_ADDED_EVENT]: true,
          [UPLOAD_START_EVENT]: 'uploadStart'
        }
        const handler = EVENTSMAP[name]
        if (handler) {
          if (handler === true) {
            return
          }
          this[handler].apply(this, args.slice(1))
        }
        args[0] = kebabCase(name)
        this.$emit.apply(this, args)
      }
    },
    created () {
      this.options.initialPaused = !this.autoStart
      const uploader = new Uploader(this.options)
      this.uploader = uploader
      this.uploader.fileStatusText = this.fileStatusText
      uploader.on('catchAll', this.allEvent)
      uploader.on(FILE_ADDED_EVENT, this.fileAdded)
      uploader.on(FILES_ADDED_EVENT, this.filesAdded)
      uploader.on('fileRemoved', this.fileRemoved)
      uploader.on('filesSubmitted', this.filesSubmitted)
    },
    destroyed () {
      const uploader = this.uploader
      uploader.off('catchAll', this.allEvent)
      uploader.off(FILE_ADDED_EVENT, this.fileAdded)
      uploader.off(FILES_ADDED_EVENT, this.filesAdded)
      uploader.off('fileRemoved', this.fileRemoved)
      uploader.off('filesSubmitted', this.filesSubmitted)
      this.uploader = null
    },
    components: {
      UploaderBtn,
      UploaderDrop,
      UploaderUnsupport,
      UploaderList,
      UploaderFiles,
      UploaderFile
    }
  }
script>

<style>
  .uploader {
    position: relative;
  }
style>

```html
主页面 App.vue
```html
<template>
  <uploader :options="options" :file-status-text="statusText" class="uploader-example" ref="uploader" @file-complete="fileComplete" @complete="complete">uploader>
template>

<script>
  export default {
    data () {
      return {
        options: {
          target: '//localhost:3000/upload', // '//jsonplaceholder.typicode.com/posts/',
          testChunks: false, //上传前判断块是否已经存在
          simultaneousUploads: 5, //并发数
          chunkSize: 8 * 1024 * 1024 //块大小
        },
        attrs: {
          accept: 'image/*'
        },
        statusText: {
          success: '成功了',
          error: '出错了',
          uploading: '上传中',
          paused: '暂停中',
          waiting: '等待中'
        }
      }
    },
    methods: {
      complete () {
        console.log('complete', arguments)
      },
      fileComplete () {
        console.log('file complete', arguments)
        const file = arguments[0].file
        let url = 'http://localhost:3000/upload/merge?filename=' + file.name + '&guid=' + arguments[0].uniqueIdentifier
        this.$axios.get(url).then(function(response) {
          
        }).catch(function (error) {
          
        })
      }
    },
    mounted () {
      this.$nextTick(() => {
        window.uploader = this.$refs.uploader.uploader
      })
    }
  }
script>

<style>
  .uploader-example {
    width: 880px;
    padding: 15px;
    margin: 40px auto 0;
    font-size: 12px;
    box-shadow: 0 0 10px rgba(0, 0, 0, .4);
  }
  .uploader-example .uploader-btn {
    margin-right: 4px;
  }
  .uploader-example .uploader-list {
    max-height: 440px;
    overflow: auto;
    overflow-x: hidden;
    overflow-y: auto;
  }
style>

三、前端请项目地址请参考:https://github.com/simple-uploader/vue-uploader

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