public class MyStringUtils { // public static String encryptString(String target,Integer factor){ // byte[] bytes = target.getBytes(); // for (int i = 0; i < bytes.length; i++) { // bytes[i] ^= factor; // } // // return new String(bytes); // } // // public static String decodeString(String target, Integer factor){ // byte[] bytes = target.getBytes(); // for (int i = 0; i < bytes.length; i++) { // bytes[i] ^= factor; // } // // return new String(bytes); // } public static String encryptString(String target,Integer factor){ char[] chars = target.toCharArray(); for (int i = 0; i < chars.length; i++) { chars[i] ^= factor; } return new String(chars); } public static String decodeString(String target, Integer factor){ char[] chars = target.toCharArray(); for (int i = 0; i < chars.length; i++) { chars[i] ^= factor; } return new String(chars); } public static void main(String[] args) { String target = "你好啊"; int factor = 31; String encryptString = encryptString(target, factor); System.out.println("加密后的字符串为===="+encryptString); System.out.println("解密后的字符串为===="+decodeString(encryptString, factor)); } }
输出结果
加密后的字符串为====使奢啕
解密后的字符串为====你好啊
思考:
为什么我把字节数组那段给注释掉了
如果使用字节数组会出现什么问题