MD5加密算法

import java.security.MessageDigest;
import sun.misc.BASE64Encoder;

public class Encrypter {
   public static String md5(String s){
    try{
     MessageDigest messageDigest=MessageDigest.getInstance("MD5");
     BASE64Encoder base64Encoder = new BASE64Encoder();
     return base64Encoder.encode(messageDigest.digest(s.getBytes("utf8")));
    }catch(Exception e){
     return s;
    }
   }
}