<el-upload
		class="avatar-uploader"
		action="https://jsonplaceholder.typicode.com/posts/"
		:show-file-list="false"
		:on-success="handleAvatarSuccess"
		:before-upload="beforeAvatarUpload">
		<img v-if="imageUrl" :src="imageUrl" class="avatar">
		<i v-else class="el-icon-plus avatar-uploader-icon"></i>
	</el-upload>

		<el-button type="primary" plain v-on:click="upData">上传</el-button>

data() {
      return {
        imageUrl: ''，
        file:''
      };
    },

 handleAvatarSuccess(res, file) {
          this.imageUrl = URL.createObjectURL(file.raw);
          //图片路径
        },
        

        beforeAvatarUpload(file) {
          this.file = file;
          console.log(this.file)
        },

	upData(){
		  let formData = new FormData();
          formData.append('head', this.file);
				//第一个参数是键   第二个是值
			//然后在这里发送请求   如果还有其他参数 	继续append    	
	
	}

**

注意：请求头为：

**

 headers: {
             'Content-Type': 'multipart/form-data', // 默认值
          },

head就是图片文件