/**
* 商户号，商户秘钥，appid，appsecrect 参数以及订单号，订单金额，时间戳等，一起签名后，请求微信预支付接口，微信端解密后校验商户号，商户秘钥，appid,appsecrect是否和微信公众平台填写的一致，
* 微信支付预付单生成
*/
@GetMapping("payOrder")
public JSONObjectunifiedOrder(@LoginUser String userId, String ordersId)throws Exception {
User user =userService.findUserByUserId(userId);
if (Objects.isNull(user)) {
return ResponseData.fail("没有查询到该用户");
}
if (YesOrNo.YES.equals(user.getDisable())) {
return ResponseData.fail("你已被禁用了哦");
}
Orders orders =orderService.findOrdersByOrderId(ordersId);
if (Objects.isNull(orders)) {
return ResponseData.fail("没有查询打订单的相关信息");
}
if (!PayStatus.PAYMENT.equals(orders.getPayStatus())) {
return ResponseData.fail("该订单不是待支付状态");
}
Map param =new LinkedHashMap<>();
WXPay wxPay =new WXPay(config);
param.put("appid", config.getAppID());
param.put("mch_id", config.getMchID());
param.put("nonce_str", WXPayUtil.generateNonceStr());
String sign = WXPayUtil.generateSignature(param, config.getKey(), WXPayConstants.SignType.MD5);
param.put("sign", sign);
param.put("body", "订单支付");
param.put("out_trade_no", orders.getSn());
BigDecimal a=new BigDecimal(100);
Stringtotal_fee= orders.getOrderPrice().multiply(a).stripTrailingZeros().toPlainString();
param.put("total_fee", total_fee.trim());
param.put("spbill_create_ip", SPBILL_CREATE_IP);
param.put("notify_url", NOTIFY_URL);
param.put("trade_type", "JSAPI");
//trade_type=JSAPI时（即JSAPI支付），此参数必传
param.put("openid", user.getOpenId());
Map response = wxPay.unifiedOrder(param);
//调微信官方文档支付
if ("SUCCESS".equals(response.get("return_code"))) {
String timeStamp = Long.toString(System.currentTimeMillis() /1000);
String nonce = WXPayUtil.generateNonceStr();
//装载拼接字符串用于二次签名验证
StringBuffer sb =new StringBuffer();
sb.append("appId=").append(response.get("appid"));
sb.append("&nonceStr=").append(nonce);
sb.append("&package=").append("prepay_id=").append(response.get("prepay_id"));
sb.append("&signType=").append("MD5");
sb.append("&timeStamp=").append(timeStamp).append("&key=").append(config.getKey());
String paySign = WXPayUtil.MD5(sb.toString());
//把用于验证签名的返回给前端
response.put("appId", response.get("appid"));
response.put("timeStamp", timeStamp);
response.put("nonceStr", nonce);
response.put("prepayId", response.get("prepay_id"));
response.put("signType", "MD5");
response.put("paySign", paySign);
response.put("nonceStr", nonce);
response.put("package", "prepay_id=" + response.get("prepay_id"));
return ResponseData.success(response);
}else {
return ResponseData.fail(response.get("return_msg"));
}
}
