给这个api发送的请求，

HttpResponse httpResponse = HttpUtils.doPost("https://api.mch.weixin.qq.com/cgi-bin/mch/customs/customdeclareorder", "", "", headers, null, reqBody);
return WXPayUtil.xmlToMap(EntityUtils.toString(httpResponse.getEntity(), "UTF-8"));

<!--- 报文字段如下 -->
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<xml>
<transaction_id>4200002704202503315254108784</transaction_id>
<mch_customs_no>210866008Q</mch_customs_no>
<out_trade_no>2503311145104860</out_trade_no>
<appid>wxaba0656***6a4526</appid>
<customs>ZONGSHU</customs>
<sign>2963AE353C92CC0EED4E249EACB5DDE7</sign>
<mch_id>1700135381</mch_id>
</xml>