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java 常用工具类,作为 apache-commons的补充

There is a newer version: 5.3.2302

package com.centit.support.security;

import org.apache.commons.codec.binary.Hex;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * Secure Hash Algorithm  安全散列算法
 * 算法比MD5效率低（算法复杂度高）所以更为安全
 * SHA-1 散列算法返回的160bit的编码，HEX编码后的长度为40Byte
 *
 * @author codefan
 */
@SuppressWarnings("unused")
public abstract class Sha1Encoder {

    protected static final Logger logger = LoggerFactory.getLogger(Sha1Encoder.class);

    private Sha1Encoder() {
        throw new IllegalAccessError("Utility class");
    }

    public static String encode(byte[] data) {
        MessageDigest SHA1;
        try {
            SHA1 = MessageDigest.getInstance("SHA-1");
            SHA1.update(data, 0, data.length);
            return new String(Hex.encodeHex(SHA1.digest()));
        } catch (NoSuchAlgorithmException e) {
            logger.error(e.getMessage(), e);//e.printStackTrace();
            return null;
        }
    }

    public static String encode(String data) {
        try {
            return encode(data.getBytes("utf8"));
        } catch (UnsupportedEncodingException e) {
            logger.error(e.getMessage(), e);//e.printStackTrace();
            return null;
        }
    }

}