java source code of Tools

package org.bcos.evidence.util;

import org.fisco.bcos.web3j.crypto.Sign;
import org.fisco.bcos.web3j.utils.Numeric;

public class Tools {
    static public Sign.SignatureData stringToSignatureData(String signatureData)
    {
        byte[] byte_3 = Numeric.hexStringToByteArray(signatureData);
        byte[] signR = new byte[32];
        System.arraycopy(byte_3, 1, signR, 0, signR.length);
        byte[] signS = new byte[32];
        System.arraycopy(byte_3, 1+signR.length, signS, 0, signS.length);
        return  new Sign.SignatureData(byte_3[0],signR,signS);
    }

    static public  String  signatureDataToString(Sign.SignatureData signatureData)
    {
        byte[] byte_3 = new byte[1+signatureData.getR().length+signatureData.getS().length];
        byte_3[0] = signatureData.getV();
        System.arraycopy(signatureData.getR(), 0, byte_3, 1, signatureData.getR().length);
        System.arraycopy(signatureData.getS(), 0, byte_3, signatureData.getR().length+1, signatureData.getS().length);
        return  Numeric.toHexString(byte_3,0,byte_3.length,false);
    }
}