java微信支付v3 0.4.9版本 验证签名代码

//获取签名和时间戳
String sign = headers.getHeaderString("Wechatpay-Signature");
String timestamp = headers.getHeaderString("Wechatpay-Timestamp");

//获取请求体
ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(requestContext.getEntityStream().readAllBytes());
String body = IOUtils.toString(byteArrayInputStream, StandardCharsets.UTF_8);

//验签
String publicKey = "公钥";
boolean result = WechatPayUtil.verifySign(body, sign, timestamp, publicKey);
if (!result) {
throw new RuntimeException("签名验证失败");
}

//将请求体再次写入流中
requestContext.setEntityStream(new ByteArrayInputStream(body.getBytes(StandardCharsets.UTF_8)));