MD5加密实现类

java 代码

import java.security.*;

public class MD5{

 public final 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;
  }
 }

 public static void main(String[] args){

  System.out.print(MD5.getMD5("abcd"));
 }
}

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• 2007-01-26 14:42
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