vue中如何上传文件

1、最终实现的效果图

2、主要用到的是element-ui中图片上传和进度条组件，下面附上具体实现代码

<template>
  <div class="admin-tenant-detail">
    <el-dialog
      title="导入"
      :visible="visible"
      custom-class="detail-dialog"
      :before-close="handleClose"
    >
      <div>
        <el-upload
          drag
          action
          :on-change="handleChange"//当改变的时候，触发的事件
          :show-file-list="false"//是否显示所传递的文件列表
          :http-request="handleUpload"//覆盖默认的上传行为
        >
          <el-button size="mini" class="import-button">
            <img src="../images/daoru.png" class="daochu-icon" />导入
          </el-button>
          <div class="el-upload__text">点击或将文件拖到这里上传</div>
        </el-upload>
        <div class="progress-eara" v-if="progressFile.length > 0">
          <span class="file-name">文件:</span>
          <div class="progress">
            <div class="tip-text">
              <img src="../images/lianjie.png" />
              <span>{{ fileProgress.fileName }}</span
              ><i class="el-icon-error" @click="removeFile"></i>
            </div>
            <el-progress
              :stroke-width="4"//进度条的宽度
              :percentage="fileProgress.percentage"//进度条所占百分比
              :status="fileProgress.status"//进度条的状态
              :color="customColor"//颜色
              :show-text="false"
            ></el-progress>
          </div>
        </div>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="handleClose" size="mini">取 消</el-button>
        <el-button
          type="primary"
          @click="handleSubmit"
          size="mini"
          v-loading="loading"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  props: {
    visible: {
      type: Boolean,
      default: () => {
        return false;
      },
      required: true
    }
  },
  data() {
    return {
      customColor: '#1E6FFF',
      progressFile: [],
      fileProgress: {
        percentage: 0,
        status: '',
        fileName: ''
      },
      file: '',
      loading: false
    };
  },
  methods: {
    handleClose() {
      this.$emit('update:visible', false);
      this.removeFile();
    },
    handleChange(file) {
      this.file = file.raw;
    },
    handleUpload() {
      const { name, size } = this.file;
      const nameType = name.split('.');
      const fileType = ['xlx', 'xlsx'];
      const nameTypeIndex = fileType.findIndex(
        item => item === nameType[nameType.length - 1]
      );
      const limitSize = size / 1024 / 1024 <= 10;
      if (nameType.length > 0 && nameTypeIndex === -1) {
        this.$message({
          type: 'error',
          message: '上传文件格式有误，请上传{.xlx,.xlsx}类型的文件'
        });
        return;
      }
      if (!limitSize) {
        this.$message({
          type: 'error',
          message: '上传的文件不可大于10M，请重新选择'
        });
        return;
      }
      this.fileProgress.percentage = 100;
      this.fileProgress.status = 'success';
      this.fileProgress.fileName = name;
      this.progressFile = [this.file];
    },
    handleSubmit() {
      this.loading = true;
      let params = new FormData();
      params.append('file', this.progressFile[0]);
      if (!this.progressFile[0]) {
        this.$message.error('请上传文件');
        this.loading = false;
        return;
      }
      this.$api.heartbeat
        .importFile(params)
        .then(res => {
          this.loading = false;
          if (res.code === this.$api.code.SUCCESS) {
            this.$message({
              type: 'success',
              message: '导入数据成功'
            });
            this.handleClose();
            this.$emit('updateHeartbeatList')
          }
        })
        .catch(() => {
          this.loading = false;
        });
    },
    removeFile() {
      this.progressFile = [];
    }
  }
};
</script>

<style scoped lang="scss">
.daochu-icon {
  width: 12px;
  height: 12px;
  margin-right: 5px;
}
.import-button {
  border: 1px solid #1e6fff;
  color: #1e6fff;
  margin-top: 60px;
  margin-bottom: 10px;
}
.progress-eara {
  margin: 24px 60px 0px;
  display: flex;
  .file-name {
    margin-right: 8px;
    height: 22px;
    font-size: 16px;
    font-weight: 500;
    color: #242628;
    line-height: 22px;
  }
  .progress {
    flex: 1;
    .el-icon-error {
      font-size: 14px;
      color: #1e6fff;
      margin-left: 16px;
    }
  }
  .tip-text {
    display: flex;
    align-items: center;
    height: 18px;
    font-size: 12px;
    font-family: PingFangSC-Regular, PingFang SC;
    color: #56585a;
    line-height: 18px;
    text-align: left;
    margin-bottom: 2px;
  }
}
</style>
<style lang="scss">
.admin-tenant-detail {
  .detail-dialog {
    width: 680px;
  }
}
</style>