MD5加密工具类

import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {
    
    public static String md5(String data) {
        byte[] digest = null;
        try {
            MessageDigest md5 = MessageDigest.getInstance("md5");
            digest  = md5.digest(data.getBytes(StandardCharsets.UTF_8));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        assert digest != null;
        String s = new BigInteger(1, digest).toString(16);//转换为16进制数
        if (s.length() < 32) //小于32位补0
            s = String.format("%32s", s).replace(" ", "0");
        return s;
    }

}
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