package com.evotech.hd.wechat; import java.util.Base64; import cn.hutool.crypto.SecureUtil; import cn.hutool.crypto.asymmetric.Sign; import cn.hutool.crypto.asymmetric.SignAlgorithm; public class WechatSignTest { public static void main(String[] args) { String privateKey = "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"; String str = "GET\n"; str += "/v3/refund/domestic/refunds/123123123123\n"; str += "1554208460\n"; str += "593BEC0C930BF1AFEB40B4A08C8FB242\n"; str += "\n"; Sign sign = SecureUtil.sign(SignAlgorithm.SHA256withRSA, Base64.getDecoder().decode(privateKey), null); String res = Base64.getEncoder().encodeToString(sign.sign(str)); System.out.println(res); } }