java自带md5生成方法

import java.security.MessageDigest;

import sun.misc.BASE64Encoder;

/**
 * md5 demo
 * @author kingschan
 *
 */
public class md5demo{

	/**
	 * 生成24位的md5字符串
	 * @param targetStr
	 * @return
	 */
	public static String getMd5Str(String targetStr)
	{
		String str = null;
		 //确定计算方法
        MessageDigest md5;
		try {
			md5 = MessageDigest.getInstance("MD5");
			BASE64Encoder base64en = new BASE64Encoder();
	        //加密后的字符串
			str=base64en.encode(md5.digest(targetStr.getBytes("utf-8")));
		} catch (Exception e) {
			e.printStackTrace();
		}
		return str;
        
	}
}