Hbase的过滤器 new SubstringComparator("不支持汉字？")

Question

    HTable hTable = new HTable(conf, TABLE_NAME);
    Scan scan = new Scan();

    //添加过滤器

// RegexStringComparator comp = new RegexStringComparator("(##test)");//正则表达式对象
SubstringComparator comp = new SubstringComparator("news");//为什么这里不能为汉字
SingleColumnValueFilter filter = new SingleColumnValueFilter(FAMILY_NAME.getBytes(), COLUMN.getBytes(), CompareOp.EQUAL, comp);
scan.setFilter(filter);
scan.setCaching(200);
scan.setCacheBlocks(false);

    ResultScanner scanner = hTable.getScanner(scan);
    for (Result result : scanner) {
        byte[] value = result.getValue(FAMILY_NAME.getBytes(),
                COLUMN.getBytes());
        writer.print("<br>Hbase查询结果：" + new String(value) + "<br>");// 网页端输出
    }
    hTable.close();