MD5与BASE64工具类

package com.work.util;


import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;



public class SecurityUtil {


	/**
	 * base64编码
	 * 
	 * @param source
	 *            原始数据输入
	 * @return Base64编码字符串
	 */
	public static String getBase64Encoding(byte[] source) {
		byte[] encodingBytes = Base64.getEncoder().encode(source);
		return new String(encodingBytes);
	}

	/**
	 * base64解码
	 * 
	 * @param source
	 *            base64解码
	 * @return Base64解码字符串
	 */
	public static String getBase64Decoding(byte[] source) {
		byte[] decodingBytes = Base64.getDecoder().decode(source);
		return new String(decodingBytes);
	}

	/**
	 * 信息摘要
	 * 
	 * @param algorithm
	 *            信息摘要算法种类
	 * @param source
	 *            信息输入源
	 * @return 摘要信息
	 * @throws NoSuchAlgorithmException
	 */

	public static String getMD(String algorithm, byte[] source) throws NoSuchAlgorithmException {
		if (algorithm == null) {
			algorithm = "MD5";
		}
		MessageDigest md = MessageDigest.getInstance(algorithm);
		byte[] result = md.digest(source);
		return fromBytesToHex(result);
	}

	/**
	 * 字节转十六进制
	 * 
	 * @param resultBytes
	 *            输入源
	 * @return 十六进制字符串
	 */
	public static String fromBytesToHex(byte[] resultBytes) {

		StringBuilder builder = new StringBuilder();
		for (int i = 0; i < resultBytes.length; i++) {
			if (Integer.toHexString(0xFF & resultBytes[i]).length() == 1) {
				builder.append("0").append(Integer.toHexString(0xFF & resultBytes[i]));
			} else {
				builder.append(Integer.toHexString(0xFF & resultBytes[i]));
			}
		}
		return builder.toString();
	}

	
}

 

转载于:https://my.oschina.net/pioneerDev/blog/887269