文件导入功能的前端实现

<input type="file" accept='.xls,.xlsx' class="file">

export function postImportRole(params) {
  return axios.post(servers + '/role/import-roles', params, {
    headers: { 'Content-Type': 'multipart/form-data;charset=UTF-8' }
  });
}

// 导入文件
importFile() {
const that = this;
const formData = new window.FormData();
const files = document.querySelector("input[type=file]").files;
formData.append("file", files[0]);
if (files.length <= 0) {
this.$openMessage("请选择导入文件", "error");
} else {
if (!/\.(xlsx)$/.test(files[0].name)) {
this.$openMessage("导入文件格式不正确", "error");
} else {
postImportRole(formData)
.then(res => {
if (res.data.code === "0") {
that.visibleImportRole = false;
this.$openMessage("导入成功");
this.search();
} else {
this.$openMessage(res.data.msg, "error");
}
})
.catch(() =>
this.$openMessage("导入失败，请核对文档格式是否正确", "error")
);
}
}