Java异或对字符进行加密和解密

class XORTest { public static void main(String args[]){ char a1='欢',a2='迎',a3='下',a4='载'; char secret='8'; a1=(char)(a1^secret); a2=(char)(a2^secret); a3=(char)(a3^secret); a4=(char)(a4^secret); System.out.println("密文:"+a1+a2+a3+a4); a1=(char)(a1^secret