1 图片上传post ok， 签名Ok，返回正常

2 提交申请单api，同样的方法拼装json，返回：

{"code":"SIGN_ERROR","detail":{"detail":{"issue":"sign not match"},"field":"signature","location":"authorization","sign_information":{"method":"POST","sign_message_length":78,"truncated_sign_message":"POST\n/v3/apply4subject/applyment\n1584584235\nWQeqUDrJOmM073PJLJhk2T0B0jDmpNze\n\n","url":"/v3/apply4subject/applyment"}},"message":"错误的签名，验签失败"}

方法：

public static String getAuthorization(String method, HttpUrl url, String body, PrivateKey yourPrivateKey, String yourMerchantId, String yourCertificateSerialNo) throws Exception {
    String nonceStr = generateNonceStr();
    long timestamp = System.currentTimeMillis() / 1000;
    String message = buildMessage(method, url, timestamp, nonceStr, body);
    System.out.println("message===="+message);
    String signature = sign(message.getBytes("utf-8"),yourPrivateKey);
    System.out.println("SHA256withRSA签名是："+signature);


    return schema+" "+"mchid=\"" + yourMerchantId + "\","
            + "nonce_str=\"" + nonceStr + "\","
            + "timestamp=\"" + timestamp + "\","
            + "serial_no=\"" + yourCertificateSerialNo + "\","
            + "signature=\"" + signature + "\"";

}

private static String buildMessage(String method, HttpUrl url, long timestamp, String nonceStr, String body) {
    String canonicalUrl = url.encodedPath();
    if (url.encodedQuery() != null) {
        canonicalUrl += "?" + url.encodedQuery();
    }

    return method + "\n"
            + canonicalUrl + "\n"
            + timestamp + "\n"
            + nonceStr + "\n"
            + body + "\n";
}
private static String sign(byte[] message, PrivateKey yourPrivateKey) throws Exception {
    Signature sign = Signature.getInstance("SHA256withRSA");
    sign.initSign(yourPrivateKey);
    sign.update(message);

    return Base64.getEncoder().encodeToString(sign.sign());
}

message====打印信息为：
message====POST
/v3/apply4subject/applyment
1584584235
WQeqUDrJOmM073PJLJhk2T0B0jDmpNze
{"business_code":"1111111111"}

s所以 为什么官方返回的truncated_sign_message 标签 里在，签名是没有body的？？？？！！！