写一个隐藏的Form表单：

<form           id="hiddenForm"           :action="exportDataAction"           hidden="true"           method="POST"         >           <input :value="dataForm.poNbr" name="poNbr" >           <input :value="dataForm.orderDate" name="orderDate" >           <input             v-if="dataForm.tempDate"             :value="dataForm.tempDate[0]"             name="startOrderDate"           >           <input             v-if="dataForm.tempDate"             :value="dataForm.tempDate[1]"             name="endOrderDate"           >           <input :value="dataForm.status" name="status" >           <input :value="dataForm.tp" name="tp" >           <input :value="userId" name="buyerId" >           <input :value="userRole" name="userRole" >         </form>   data(){ 　　exportDataAction: "/nodPunish/exportData", } //导出     downloadData() {       this.exportFlag = true;       let hiddenForm = document.getElementById("hiddenForm");       if (this.dataForm.tempDate) {         this.dataForm.startOrderDate = this.dataForm.tempDate[0];         this.dataForm.endOrderDate = this.dataForm.tempDate[1];       } else {         this.dataForm.startOrderDate = null;         this.dataForm.endOrderDate = null;       }       hiddenForm.submit();       this.exportFlag = false;