java使用nio写【中文与ascii字符（abc123）混合】时，出现不可见字符，其ascii码为0

问题代码demo

public static void main(String[] args) {
   
   

        String text = "你好aa";
        final CharBuffer charStreamBuffer = CharBuffer.allocate(8192);

        BufferedReader bufferInput = new BufferedReader(new StringReader(text));
        try {
   
   
            int singleBatchSize;
            while ((singleBatchSize = bufferInput.read(charStreamBuffer)) != -1) {
   
   
                byte[] array = StandardCharsets.