<template>
   <div class="clearfix">
    <a-upload
      :headers="headers"
      :action="fileurl"
      list-type="picture-card"
      :file-list="fileList"
      :before-upload="beforeUpload"
      @preview="handlePreview"
      @change="handleChange"
    >
      <div v-if="fileList.length < imgNum">
        <a-icon type="plus" />
        <div class="ant-upload-text">
          上传图片
        </div>
      </div>
    </a-upload>
    <a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel">
      <img alt="example" style="width: 100%" :src="previewImage" />
    </a-modal>
  </div>
</template>
<script>
function getBase64(file) {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => resolve(reader.result);
    reader.onerror = error => reject(error);
  });
}
export default {
  props: {
	    msgVal: {
	        type: String, 
	        default: ""
	    }
	},
  data() {
    return {
      imgNum:1,
      headers: {
           'token': localStorage.getItem('token'),
        },
      fileurl:'http://192.168.18.188:9103'+"/file/upload",
      previewVisible: false,
      previewImage: '',
      fileList: []
    };
  },
  methods: {
    handleCancel() {
      this.previewVisible = false;
    },
    async handlePreview(file) {
      if (!file.url && !file.preview) {
        file.preview = await getBase64(file.originFileObj);
      }
      this.previewImage = file.url || file.preview;
      this.previewVisible = true;
    },
    handleChange({ fileList }) {
      this.fileList = fileList; //fileList[0].response.data.fjurl//后台只需要这个地址/upload/2021-04-16/jyzxx.png
      this.$emit('fileimgUrl', fileList[0].response.data.fjurl) 
    },
    beforeUpload(file) {
      const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png';
      if (!isJpgOrPng) {
        this.$message.error('请上传jpg/png格式图片!');
      }
      const isLt2M = file.size / 1024 / 1024 < 2;
      if (!isLt2M) {
        this.$message.error('图片大小不得超出2MB!');
      }
      return isJpgOrPng && isLt2M;
    },
  },
};
</script>
<style scoped>
.ant-upload-select-picture-card i {
  font-size: 32px;
  color: #999;
}

.ant-upload-select-picture-card .ant-upload-text {
  margin-top: 8px;
  color: #666;
}
</style>

使用：

<upload-img @fileimgUrl="fileimgUrl" :msg-val="msg"></upload-img>
<!--  -->
fileimgUrl(value){
	//得到后台传过来的地址
	console.log(value)
}

假如在编辑的时候，后台返回了地址：http://192.168.18.188:9103/upload/2021-04-16/jyzxx.png，可直接给fileList赋值

fileList: [
        {
          uid: '-1',
          name: 'image.png',
          status: 'done',
          url: msg,
        },

下面为传到后台返回的：

写的不好，可留言指正，互相学习！