package javax.utils;

/**

 * 字符串转码工具类

 *

 * @author Logan

 * @createDate 2019-04-01

 * @version 1.0.0

 *

 */

public class StringConvertUtils {

    /**

     * 转换字符串为16进制字符串

     *

     * @param text 源字符串

     * @return 转义后的16进制字符串

     */

    public static String encode(String text) {

        if (null == text) {

            return null;

        }

        StringBuffer buf = new StringBuffer();

        byte[] bytes = text.getBytes();

        for (byte b : bytes) {

            buf.append(String.format("%02x", b));

        }

        return buf.toString();

    }

    /**

     * 解码转义的16进制字符串

     *

     * @param encodeStr 转义的16进制字符串

     * @return 源字符串

     */

    public static String decode(String encodeStr) {

        if (null == encodeStr) {

            return null;

        }

        // 一个字节会转为两个16进制字符

        if (encodeStr.length() % 2 != 0) {

            throw new IllegalArgumentException("错误的编码字符串");

        }

        byte[] bytes = new byte[encodeStr.length() / 2];

        for (int i = 0; i < bytes.length; i++) {

            bytes[i] = (byte) Integer.parseInt(encodeStr.substring(i * 2, i * 2 + 2), 16);

        }

        return new String(bytes);

    }

    public static void main(String[] args) {

        String s = "A⊙♂()[] {}=BBbb=&&||";

        String encodeStr = encode(s);

        System.out.println(encodeStr);

        String decodeStr = decode(encodeStr);

        System.out.println(decodeStr);

    }

}