Class ToolBase64

security/src/main/java/pro/tools/security/ToolBase64.java:15–190

Base64的加密解密 @author SeanDragon Create By 2017-04-20 14:43

 * Create By 2017-04-20 14:43
 */
public final class ToolBase64 {
    private ToolBase64() {
        throw new UnsupportedOperationException("我是工具类，别初始化我。。。");
    }

    /**
     * 功能：编码字符串
     *
     * @param data
     *         源字符串
     *
     * @return String
     */
    public static String encode(String data) {
        return new String(encode(data.getBytes()));
    }

    /**
     * 功能：解码字符串
     *
     * @param data
     *         源字符串
     *
     * @return String
     */
    public static String decode(String data) {
        return new String(decode(data.toCharArray()));
    }

    /**
     * 功能：编码byte[]
     *
     * @param data
     *         源
     *
     * @return char[]
     */
    public static char[] encode(byte[] data) {
        char[] out = new char[((data.length + 2) / 3) * 4];
        for (int i = 0, index = 0; i < data.length; i += 3, index += 4) {
            boolean quad = false;
            boolean trip = false;

            int val = (0xFF & (int) data[i]);
            val <<= 8;
            if ((i + 1) < data.length) {
                val |= (0xFF & (int) data[i + 1]);
                trip = true;
            }
            val <<= 8;
            if ((i + 2) < data.length) {
                val |= (0xFF & (int) data[i + 2]);
                quad = true;
            }
            out[index + 3] = alphabet[(quad ? (val & 0x3F) : 64)];
            val >>= 6;
            out[index + 2] = alphabet[(trip ? (val & 0x3F) : 64)];
            val >>= 6;