Signature algorithm generation rules

When requesting OSL Pay OpenAPI, you need to combine "appId" and "timestamp" to generate "content (appId=?&timestamp=?)" and a signature as shown in the following example. view RSAUtils

public class SignUtil {
    private static final String HEADER_APPID = "appId";
    private static final String HEADER_TIMESTAMP = "timestamp";
    private static final String PRIVATE_SECRET = "您的私钥";

    public String getsignature(String appId, String timestamp) {
        String signContent = buildRawContent(appId, timestamp);
        String sign = null;
        try {
            //生成签名 RSAUtils 文档结尾有提供
            sign = RSAUtils.sign(signContent,PRIVATE_SECRET);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        return sign;

    }

    public String buildRawContent(String appId, String timestamp) {
        return HEADER_APPID + '=' + appId + '&' + HEADER_TIMESTAMP + '=' + timestamp;
    }
}