content: package com.soecode.wxtools.util.crypto;
  
  import java.security.MessageDigest;
  
  public class MD5 {
  
  	public static String getMD5(String origin, String charsetname) {
  		String resultString = null;
  		try {
  			resultString = new String(origin);
  			MessageDigest md = MessageDigest.getInstance("MD5");
  			if (charsetname == null || "".equals(charsetname))
  				resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
  			else
  				resultString = byteArrayToHexString(md.digest(resultString.getBytes(charsetname)));
  		} catch (Exception exception) {
  			
  		}
  		return resultString;
  	}
  
  	private 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;
  		int d1 = n / 16;
  		int d2 = n % 16;
  		return hexDigits[d1] + hexDigits[d2];
  	}
  
  	private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d",
  			"e", "f" };
  }
  