package com.yutu.base.utils;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5 {
	/**
	 * Md5加密（32位）
	 * @param str
	 * @return
	 */
	public static String getMD5Str(String str){    
        MessageDigest messageDigest = null;    
        try    
        {    
            messageDigest = MessageDigest.getInstance("MD5");    
            messageDigest.reset();    
            messageDigest.update(str.getBytes("UTF-8"));    
        } catch (NoSuchAlgorithmException e)    
        {    
            System.out.println("NoSuchAlgorithmException caught!");    
            System.exit(-1);    
        } catch (UnsupportedEncodingException e)    
        {    
            e.printStackTrace();    
        }    
    
        byte[] byteArray = messageDigest.digest();    
    
        StringBuffer md5StrBuff = new StringBuffer();    
    
        for (int i = 0; i < byteArray.length; i++)    
        {    
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)    
                md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));    
            else    
                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));    
        }    
        return md5StrBuff.toString();    
    }    
}