MD5加密

package test;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;public class MD5 {public byte[] encrypt(String msg){try {MessageDigest md5 = MessageDigest.getInstance("MD5");byte[] bt = msg.getBytes();md5.update(bt);byte[] rebt = md5.digest();return rebt;} catch (NoSuchAlgorithmException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}public static void main(String[] args){String msg = "我们都是中国人!";System.out.println("明文是："+msg);MD5 md = new MD5();byte[] retbt = md.encrypt(msg);String result = new String(retbt);System.out.println("密文是："+result);}}