Java MD5 加密工具類

轉載聲明：http://blog.csdn.net/zishan007/article/details/7971229

package com.chinasoft.corpinfosys.common;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
 * 功能簡介：MD5加密工具類
 * 密碼等安全信息存入數據庫時，轉換成MD5加密形式
 * @author 
 * 
 *
 */
public class MD5Util
{
    public static String getMd5(String inStr)
    {
        String outStr=null;
        if(inStr ==null)
        {
            outStr = null;
        }
        else if("".equals(inStr))
        {
            outStr = "";
        }
        else
        {
            try
            {
                MessageDigest md = MessageDigest.getInstance("MD5");
                md.update(inStr.getBytes());
                byte b[] = md.digest();
                StringBuffer buf = new StringBuffer();
                for(int i=1;i<b.length;i++)
                {
                    int c = b[i]>>>4 & 0xf;
                    buf.append(Integer.toHexString(c));
                    c = b[i]& 0xf;
                    buf.append(Integer.toHexString(c));
                }
                outStr = buf.toString();
            }
            catch (NoSuchAlgorithmException e)
            {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return outStr;
    }

}