www.pudn.com > MD5codejava.rar > MD5codejava.java

package com.hjhm.functions; 
import java.security.MessageDigest; 
/** 
* 
Title:MD5Encode 
 
* 
Description: 用于实现md5加密算法的类
 
* 
Copyright: Copyright (c) 2003
 
* 
Company: hjhm
 
* @author lyzcw 
* @version 1.0 
*/ 
 
public class MD5Encode { 
    public MD5Encode() { 
    } 
 
    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 byteArrayToHexString(byte[] b) { 
  StringBuffer resultSb = new StringBuffer(); 
  for (int i = 0; i < b.length; i++) { 
    resultSb.append(byteToHexString(b[i])); 
  } 
  return resultSb.toString(); 
} 
 
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 MD5(String origin) { 
  String resultString = null; 
 
  try { 
    resultString=new String(origin); 
    MessageDigest md = MessageDigest.getInstance("MD5"); 
    resultString=byteArrayToHexString(md.digest(resultString.getBytes())); 
  } 
  catch (Exception ex) { 
 
  } 
  return resultString; 
} 
 
}