代码如下所示：
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta http-equiv="X-UA-Compatible" content="ie=edge"><title>Vue</title><!-- <script src="../vue.js"></script> --><script src="/npm/vue/dist/vue.js"></script><script src="/ajax/jquery/jquery-1.9.0.min.js"></script><script src="/vue-resource/1.5.1/vue-resource.min.js"></script></head><body><div id="app"><input class="file" name="file" type="file" accept="image/png,image/gif,image/jpeg" @change="update"/></div><script>var vm = new Vue({el: '#app',methods: {update: function (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://127.0.0.1:8080/api/create/upload',param,config).then(response=>{console.log(response.data);})}}})</script></body></html>
最后的结果如下：
