vue element upload请求后端 vue中element 的upload组件发送请求给后端操作

var _this = this;
   debugger;
   // var files=file.target.files[0];
   debugger;
   const isJPG = file.type === "image/jpeg";
   const isLt2M = file.size / 1024 / 1024 < 2;
 
   if (!isJPG) {
    this.$message.error("上传头像图片只能是 JPG 格式!");
   }
   if (!isLt2M) {
    this.$message.error("上传头像图片大小不能超过 2MB!");
   }
   //  return isJPG && isLt2M;
   let formData = new FormData();
   formData.append("file", file);
   axios
    .post("http://192.168.0.116:8083/pic/upload", formData)
    .then(function(response) {
     _this.enclosure.openPermitimgUrl = response.data;
     // alert(response.data);
     console.log(response);
    })
    .catch(function(error) {
     alert("上传失败");
     console.log(error);
    });