package com.matrix.component.wechat.externalInterface.common;
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import java.security.MessageDigest;
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/**
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* User: rizenguo
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* Date: 2014/10/23
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* Time: 15:43
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*/
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public class MD5 {
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private final static String[] hexDigits = {"0", "1", "2", "3", "4", "5", "6", "7",
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"8", "9", "a", "b", "c", "d", "e", "f"};
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/**
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* 转换字节数组为16进制字串
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* @param b 字节数组
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* @return 16进制字串
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*/
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public static String byteArrayToHexString(byte[] b) {
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StringBuilder resultSb = new StringBuilder();
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for (byte aB : b) {
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resultSb.append(byteToHexString(aB));
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}
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return resultSb.toString();
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}
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/**
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* 转换byte到16进制
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* @param b 要转换的byte
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* @return 16进制格式
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*/
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private static String byteToHexString(byte b) {
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int n = b;
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if (n < 0) {
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n = 256 + n;
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}
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int d1 = n / 16;
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int d2 = n % 16;
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return hexDigits[d1] + hexDigits[d2];
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}
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/**
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* MD5编码
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* @param origin 原始字符串
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* @return 经过MD5加密之后的结果
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*/
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public static String MD5Encode(String origin) {
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String resultString = null;
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try {
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resultString = origin;
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MessageDigest md = MessageDigest.getInstance("MD5");
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resultString = byteArrayToHexString(md.digest(resultString.getBytes("utf-8")));
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} catch (Exception e) {
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e.printStackTrace();
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}
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return resultString;
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}
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}
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