Java实现文件下载遮罩层

参照Java实现点击导出excel页面遮罩屏蔽，下载完成后解除遮罩

 var endFlg = 0;
Java实现点击导出excel页面遮罩屏蔽，下载完成后解除遮罩
    /**
     *全量导出
     * @author Jamin
     * @date 2020/11/12 10:46
     */
    //投诉导出
    form.on('submit(fullExportData)', function (data) {
        endFlg = 0;
        let loadIndex = layer.msg("导出中,请稍后......", {icon: 16, shade: 0.01, time: 0});
        location.href = ctx + "complain/exportFullCompData?swiftNumber=" + data.field.fullSwiftNumber + "&complaintContent=" +
            data.field.fullComplaintContent + "&fromDate=" + data.field.fullFromDate + "&toDate=" + data.field.fullToDate +
            "&compState=" + data.field.allCompState;
        listenEnd(loadIndex);
        return false;
    });

    /**
     * 循环监听是否结束
     * @param loadIndex
     */
    function listenEnd(loadIndex) {
        var loop = setInterval(function () {
            if (endFlg == "1") {
                clearInterval(loop);
                layer.close(loadIndex);
            } else {
                getFlag();
            }
        }, 1000);
    }

    /**
     *获取标识
     * @author Jamin
     * @date 2020/11/12 15:51
     */
    function getFlag() {
        $.ajax(ctx + 'complain/getEndFlag', {
            type: 'get',
            dataType: 'json',
            success: function (res) {
                endFlg = res.flag;
            }
        })
    }

/**
	 * 全量投诉导出
	 *
	 * @param
	 * @author Jamin
	 * @date 2020/11/12 10:50
	 */
	@RequestMapping("exportFullCompData")
	public void exportFullCompData(HttpServletResponse response, HttpServletRequest request, Complain complain, String fromDate, String toDate,
	                               String compState) {
		request.getSession().removeAttribute("endFlag");
		complainService.exportFullCompData(response, complain, fromDate, toDate, compState);
		request.getSession().setAttribute("endFlag", "1");
	}

	/**
	 * 从session获取结束标识
	 *
	 * @param request
	 * @return {@link com.alibaba.fastjson.JSONObject}
	 * @author Jamin
	 * @date 2020/11/12 15:26
	 */
	@ResponseBody
	@RequestMapping("getEndFlag")
	public JSONObject getEndFlag(HttpServletRequest request) {
		Object endFlag = request.getSession().getAttribute("endFlag");
		JSONObject jsonObject = new JSONObject();
		jsonObject.put("flag", endFlag);
		return jsonObject;
	}