MD5加密工具类MD5

传入字符串可直接返回加密结果

package com.mosukj.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5 {
    
    
	private final static String[] hexDigits = {
    
    
		"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"
	};
	
	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 Object 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];
	}
	/**
	 * 加密方法
	 * @param origin 原始字符
	 * @return  加密后字符内容
	 */
	public static String compile(String origin)
	{
    
    
		String resultString = null;
		
		MessageDigest md;
		try 
		{
    
    
			resultString = new String(origin);
			md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
		} 
		catch (NoSuchAlgorithmException e) 
		{
    
    
			e.printStackTrace();
		}
		return resultString;
	}
}