【vue】el-upload上传示例

1.前端代码

<template>
  <div>
    <el-upload
      style="height: 100%"
      ref="upload"
      action="action"
      :limit="limitNum"
      :auto-upload="true"
      :drag="true"
      :accept="accept"
      :show-file-list="false"
      :list-type="listType"
      :http-request="httpRequest"
      :before-upload="beforeUpload"
      :on-change="fileChange"
      :on-exceed="exceedFile"
      :on-success="handleSuccess"
      :on-progress="handleProgress"
      :on-error="handleError"
      :on-remove="removeFile"
      :file-list="fileList"
      :class="status == 3? 'uploadRedBorder':'uploadBorder'"
    >
      <div style="width:100%">
        <div class="upload-content">
          <i :class="icon" :style="{'color':color}"></i>
          <el-tooltip
            class="item"
            effect="dark"
            content="请上传符合模板格式的文件哦！"
            placement="top"
          >
            <span v-if="status === 1" :style="{'color':color}">{{text}}</span>
          </el-tooltip>
          <span v-if="status !== 1" :style="{'color':color}">
            <div class= "box" v-if="status == 4">
              <span class= "clip" :style= "clipStyle"></span>
              <span class="clipNum">{{Math.round(progress)+"%"}}</span>
            </div>
            {{text}}
          </span>
        </div>
        <!--点击上传 1-->
        <div class="el-upload__text" v-if="status == 1">
          您也可以将文件拖动到这里
          <el-tooltip
            class="item"
            effect="dark"
            :content="tip"
            placement="top"
          >
            <i class="el-icon-warning"></i>
          </el-tooltip>
        </div>
        <!--上传成功 2-->
        <div class="el-upload__text" v-else-if="status == 2" style="display:flex">
          <div style="width: 70%" class="file-name"><div class="ellipsis"><i class="el-icon-document"></i>{{fileName}}</div></div>
          <div style="flex: 0 0 auto" class="del"><el-link type="danger" @click.stop="handleDelFile(file)">删除</el-link></div>
        </div>
        <!--上传中 4-->
        <div class="el-upload__text" v-else-if="status == 4" style="display:flex">
          <div style="width: 70%" class="file-name"><div class="ellipsis"><i class="el-icon-document"></i>{{fileName}}</div></div>
          <div style="flex: 0 0 auto" class="del"><el-link type="primary" @click.stop="handleDelFile(file)">取消</el-link></div>
        </div>
        <!--上传失败 3-->
        <div class="el-upload__text" v-else-if="status == 3" style="display:flex">
          <div style="width: 70%" class="file-name"><div class="ellipsis"><i class="el-icon-document"></i>{{fileName}}</div></div>
          <div style="flex: 0 0 auto" class="del"><el-link type="primary" @click.stop="handleDelFile(file)">重新上传</el-link></div>
        </div>
      </div>
    </el-upload>
    <div class="errTipText" v-show="status == 3"><i class="el-icon-warning-outline"></i>{{msg}} <div v-if="link != ''">您可以<div class="downModel" @click="downloadError">下载文件</div>查看原因</div></div>
  </div>
</template>

<script>
export default {
  name: "test",
  data () {
    return {
      limitNum: 2,
      listType: '',
      isPictureImg: false,
      fileList: [],
      menu: false,
      progress: '0',
      status: 1,
      icon: 'el-icon-upload',
      color: '#1E78FF',
      text: '点击上传',
      button: '',
      msg: '',
      formLabelWidth: '80px',
      file: null,
      fileName: '',
      link: '',
      action: '/upload/upload',
      maxSize: 10,
      drag: true,
      accept: '.xlsx',
      tip: '支持xlsx文件类型，限制10M'
    };
  },
  methods: {
    httpRequest(param){
      var fd = new FormData()
      fd.append('file', param.file)
      fd.append('name', param.file.name)
      this.$axios({
        url: this.action,
        method: 'post',
        data: fd,
        headers: { 'Content-Type': 'multipart/form-data', 'Authorization': sessionStorage.getItem("token") },
        //进度
        onUploadProgress: progressEvent => {
          // progressEvent.loaded:已上传文件大小
          // progressEvent.total:被上传文件的总大小
          param.file.percent = (progressEvent.loaded / progressEvent.total * 100)
          param.onProgress(param.file)
        }
      }).then(res => {
        if (res.data.success) {
          param.onSuccess(res)
        } else {
          param.onError(res)
        }
      }).catch(error => {
        param.onError(error)
        console.log(error)
      })
    },
    handleProgress(event, file, fileList){
      if(file){
        this.status = 4
        this.text = '上传中'
        this.icon = ''
        this.fileName = file.name
        this.color = '#BBC1D9'
        this.button = '取消'
        this.progress = event.percent
      }else{
        this.$refs.upload.abort(file)
        this.status = 3
        this.progress = 0
      }
    },
    removeFile(file, fileList){
      if(fileList.length > 0){
        this.file = fileList[fileList.length-1]
      }else{
        this.file = null
      }
    },
    handleDelFile(file){
      this.text = '点击上传'
      this.icon = 'el-icon-upload',
      this.color = '#1E78FF',
      this.msg = ''
      this.link = ''
      this.fileName = ''
      this.status = 1
      this.$refs.upload.handleRemove(file);
      this.$emit("handleDisable",true)
    },
    // 文件超出个数限制时的钩子
    exceedFile(file, fileList) {
      // this.$refs.upload.abort(file)
    },
    // 文件状态改变时的钩子
    fileChange(file, fileList) {
      if (fileList.length > 1) {
        fileList.splice(0, 1)
        this.fileName = ''
      }
      if(fileList.length > 0){
        this.file = fileList[fileList.length-1]
        this.fileName = file.name
      }else{
        this.showFileList = false
      }
    },
    // 上传文件之前的钩子, 参数为上传的文件,若返回 false 或者返回 Promise 且被 reject，则停止上传
    beforeUpload(file) {
      this.msg = '';
      var extension = file.name.substring(file.name.lastIndexOf('.') + 1)
      if (this.accept.indexOf(extension)<0) {
        this.fileName = file.name
        this.msg = '文件类型错误'
        this.status = 3
        return false
      }
      var size = file.size / 1024 / 1024
      if (size > 10) {
        this.fileName = file.name
        this.msg = '文件大小不能超过10MB!'
        this.status = 3;
        this.button = '重新上传'
        this.text = '上传失败'
        this.color = '#F43C3C'
        this.icon = 'el-icon-error'
        this.$emit("handleDisable",true)
        return false;
      }
    },
    // 文件上传成功时的钩子
    handleSuccess(res, file, fileList) {
      if(res.data.msg != '操作成功'){
        this.status = 3;
        this.fileName = file.name
        this.icon = 'el-icon-error'
        this.button = '重新上传'
        this.text = '上传失败'
        this.color = '#F43C3C'
        this.msg = res.data.msg
        if(res.data.data != ''){
          this.link = res.data.data
        }
        if(!res.data.msg){
          this.msg = '上传失败，请再试一次'
        }
      }else{
        this.status = 2;
        this.icon = 'el-icon-success'
        this.text = '上传成功'
        this.button = '删除'
        this.color = '#67C23A'
      }
      this.$emit("handle",res)
    },
    // 文件上传失败时的钩子
    handleError(err, file, fileList) {
      this.status = 3;
      this.fileName = file.name
      this.icon = 'el-icon-error'
      this.button = '重新上传'
      this.text = '上传失败'
      this.color = '#F43C3C'
      this.msg = err.data.msg
      if(!err.data.msg){
        this.msg = '上传失败，请再试一次'
      }
      this.$emit("handleDisable",true)
    },
    clearFileData(){
      this.text = '点击上传'
      this.icon = 'el-icon-upload',
      this.color = '#1E78FF',
      this.msg = ''
      this.fileName = ''
      this.status = 1
      this.fileList = []
      this.file = null
    }
  }
};
</script>
<style lang="scss" scope>
  .ellipsis{
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .upload-content {
    font-size: 14px;
    line-height: 18px;
    color: #1E78FF;
    margin-top: 28px !important;
    margin-bottom: 16px !important;
    cursor: pointer;
  }

  .upload-content i {
    font-size: 22px;
    line-height: 24px;
    color: #1E78FF;
  }

  .upload-content span {
    vertical-align: text-top;
  }

  .el-upload-dragger {
    width: 248px !important;
    height: 110px !important;
    background:transparent !important;
  }
  .el-upload .el-upload-dragger .upload-content i {
    margin: 0;
    line-height: 20px;
    font-size: 20px;
  }
</style>

2.后端代码

import com.github.xiaoymin.knife4j.annotations.ApiOperationSupport;
import io.swagger.annotations.*;
import lombok.AllArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import springfox.documentation.annotations.ApiIgnore;
import java.io.File;
import java.util.Map;

/**
 * 上传测试
 */
@Slf4j
@RestController
@AllArgsConstructor
@RequestMapping("upload")
@Api(value = "文件上传", tags = "文件上传")
public class UploadFacade2 {


    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    @ApiOperationSupport(order = 1)
    @ApiOperation(value = "导入文件", notes = "导入文件")
    public Object importKnowledgeExcel(@ApiParam(value = "上传文件", required = true) @RequestParam("file") MultipartFile mf, @ApiIgnore @RequestParam Map<String, Object> params) {
        if (mf.isEmpty()) {
            return "导入文件为空";
        }
        String tmpDir = "D:\\";
        File tmpDirFile = new File(tmpDir);
        if (!tmpDirFile.exists() && !tmpDirFile.isDirectory()) {
            tmpDirFile.mkdir();
        }
        Long time = System.currentTimeMillis();
        File file = new File(tmpDir + time);

        try {
            mf.transferTo(file);
            return time;
        } catch (Exception e1) {
            log.error(e1.getMessage());
        }
        return false;
    }
}