android和php，字符压缩和编码

public static byte[] deflater(String data) {

        
        //内存输出流
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

        // 要使用no_wrap的Deflater，php才能解压，9是最高的压缩级别，可以设置为1-9的级别，1速度最快
        DeflaterOutputStream deflaterOut = new DeflaterOutputStream(outputStream, new Deflater(9, true));
        try {
            deflaterOut.write(data.getBytes());
            //一定要finish否则长度为0
            deflaterOut.finish();
            outputStream.flush();

            //String str = outputStream.toString();
            byte[] byteArray = outputStream.toByteArray();
            return byteArray;

        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } finally {
            try {
                //inputStream.close();
                deflaterOut.close();
                outputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

public static String (String s) {
    byte[] bytes;
    String encodeString = null;
    try {
        bytes = s.getBytes("UTF-8");
        encodeString = Base64.encodeToString(bytes, Base64.NO_WRAP)
        //java中使用（需要jdk8）
        //Base64.getEncoder().encodeToString("some string".getBytes("utf-8"));
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }

    return encodeString;
}