{"chain_id":"wenchang-tianhe","class_id":"dasdsa","nft_id":"dasdsa","recipient":"dasdsa",
"recipient_phone":"17381842007","sender":"dasdsa","tx_hash":"dasdsa"}

import cn.hutool.core.util.CharsetUtil;
import cn.hutool.crypto.SecureUtil;
import cn.hutool.crypto.asymmetric.Sign;
import cn.hutool.crypto.asymmetric.SignAlgorithm;
import java.util.Base64;

public class SignUtils {

    public static  boolean verifySign(String resData, String signData, String publicKey) {
        Sign sign = SecureUtil.sign(SignAlgorithm.SHA1withRSA,null, publicKey);
        //注意Base64
        return  sign.verify(resData.getBytes(CharsetUtil.CHARSET_UTF_8), Base64.getDecoder().decode(signData));
    }

    public static String sign(String respData, String platformPrivateKey, String platformPublicKey) {
        Sign sign = SecureUtil.sign(SignAlgorithm.SHA1withRSA, platformPrivateKey, platformPublicKey);
        byte[] signed = sign.sign(respData.getBytes(CharsetUtil.CHARSET_UTF_8));
        //注意Base64
        return  Base64.getEncoder().encodeToString(signed);
    }

}

import cn.hutool.core.codec.Base64;
import cn.hutool.crypto.symmetric.AES;
import cn.hutool.core.util.RandomUtil;
import org.junit.Assert;
import org.junit.Test;

public class AesTest {
    @Test
    public void aes() {
        String key=RandomUtil.randomString(32);
        System.out.println(key);
        //默认的AES加密方式：AES/ECB/PKCS5Padding
        AES aes=new AES(key.getBytes(StandardCharsets.UTF_8));
        Assert.assertEquals(key,new String(aes.getSecretKey().getEncoded(),StandardCharsets.UTF_8));
        //注意Base64
        String encrypt = Base64.encode(aes.encrypt("18692709323".getBytes(StandardCharsets.UTF_8)));
        System.out.println("加密:"+encrypt);
        //注意Base64
        System.out.println("解密:"+new String(aes.decrypt(Base64.decode(encrypt)),StandardCharsets.UTF_8));
    }
}