package com.mobi5.commons.utils;
import java.security.MessageDigest;
public class MD5Encrypt {
public MD5Encrypt() {}
private final static String[] hexDigits = {
"0", "1", "2", "3", "4", "5", "6", "7",
"8", "9", "a", "b", "c", "d", "e", "f"};
/**
* 转换字节数组为16进制字串
* @param b 字节数组
* @return 16进制字串
*/
public static String byteArrayToString(byte[] b) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++) {
resultSb.append(byteToHexString(b[i]));//若使用本函数转换则可得到加密结果的16进制表示,即数字字母混合的形式
//resultSb.append(byteToNumString(b[i]));//使用本函数则返回加密结果的10进制数字字串,即全数字形式
}
return resultSb.toString();
}
private static String byteToNumString(byte b) {
int _b = b;
if (_b < 0) {
_b = 256 + _b;
}
return String.valueOf(_b);
}
private static String byteToHexString(byte b) {
int n = b;
if (n < 0) {
n = 256 + n;
}
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
public static String MD5Encode(String origin) {
String resultString = null;
try {
resultString = origin;
MessageDigest md = MessageDigest.getInstance("MD5");
resultString = byteArrayToString(md.digest(resultString.getBytes("GB2312")));
}
catch (Exception ex) {
}
return resultString;
}
public static void main(String[] args) {
System.out.println(MD5Encode("3481471j2hy6g$kuh*grt73fv9kjdy34"));
//System.out.println(MD5Encode(MD5Encode("中国")));
}
}