加密解密

代码如下，不多说。先这样，如果合成四个字节加密一次是否会更快。

public class EncryptUncrypt {    public static byte[] encryptAndUncrypt(byte[] valueBuf, byte[] secret) {// 对value加密，secret密文字符// 将需要加密的内容转换为字节数组        final int valLen = valueBuf.length;        for (int i = 0; i < valLen; ) {            for (int j = 0; j < secret.length; j++) {                int index = i * valLen + j;                if (index < valLen) {                    valueBuf[index] = (byte) (valueBuf[index] ^ secret[j]);          // 通过异或运算进行加密                }            }            i++;        }        return valueBuf;// 返回加密后的字符串    }    public static void main(String[] args) {        String value = "学习Java";// 需要加密的内容        byte[] secret = new byte[]{32,93,9};// 密文字符        System.out.println("原字符串为：" + value);        // 加密        byte[] encryptResult = EncryptUncrypt.encryptAndUncrypt(value.getBytes(), secret);        System.out.println("加密后的值：" + new String(encryptResult, 0, encryptResult.length));        // 解密        byte[] uncryptResult = EncryptUncrypt.encryptAndUncrypt(encryptResult, secret);        System.out.println("解密后的值：" + new String(uncryptResult, 0, uncryptResult.length));    }}