标准MD5加密算法

public class Md5 {
public static String getMd5(String s) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f' };

try {
byte[] strTemp = s.getBytes();
MessageDigest mdTemp = MessageDigest.getInstance("md5");
mdTemp.update(strTemp);
byte[] md = mdTemp.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
return null;
}
}

/**
* 标准MD5加密
*
* @param inStr
* @return
* @throws Exception
*/
public static String toMD5(String inStr) {
StringBuffer sb = new StringBuffer();
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(inStr.getBytes());
byte b[] = md.digest();
int i;
for (int offset = 0; offset < b.length; offset++) {
i = b[offset];
if (i < 0)
i += 256;
if (i < 16)
sb.append("0");
sb.append(Integer.toHexString(i));
}
} catch (Exception e) {
return null;
// e.printStackTrace();
}
return sb.toString().toUpperCase();
}

public static void main(String[] args) throws Exception {
System.out.println(toMD5("MATICSOFT").toUpperCase());
System.out.println(getMd5("MATICSOFT").toUpperCase());
}
}