Vue 使用Axios上传文件

<input class="file" name="file" type="file" accept="image/png,image/gif,image/jpeg" @change="update"/>

methods: {
  update(e){
    let file = e.target.files[0];
    let param = new FormData(); //创建form对象
    param.append('file',file);//通过append向form对象添加数据
    console.log(param.get('file')); //FormData私有类对象，访问不到，可以通过get判断值是否传进去
    let config = {
      headers:{'Content-Type':'multipart/form-data'}
    }; //添加请求头
    this.$http.post('http://127.0.0.1:8081/upload',param,config)
      .then(response=>{
        console.log(response.data);
      })
  }
}

<form>
    <input type="text" value="" v-model="name" placeholder="请输入用户名">
    <input type="text" value="" v-model="age" placeholder="请输入年龄">
    <input type="file" @change="getFile($event)">
    <button @click="submitForm($event)">提交</button>
</form>

data: {
      name: '',
      age: '',
      file: ''
},
methods: {
  getFile(event) {
    this.file = event.target.files[0];
    console.log(this.file);
  },
  submitForm(event) {
    event.preventDefault();
    let formData = new FormData();
    formData.append('name', this.name);
    formData.append('age', this.age);
    formData.append('file', this.file);

    let config = {
      headers: {
        'Content-Type': 'multipart/form-data'
      }
    }

    this.$http.post('http://127.0.0.1:8081/upload', formData, config).then(function (response) {
      if (response.status === 200) {
        console.log(response.data);
      }
    })
  }
}