读log文件及与时间对比

来源：互联网发布：r语言怎么保存数据编辑：程序博客网时间：2024/06/05 03:34

public String getlog() throws IOException, ParseException{
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long now_time = System.currentTimeMillis();
        long before_one_hour_time = now_time - 3600000;

        FileInputStream fis = new FileInputStream("E:/log/data.log.2010-05-26");
        Iterator<String> itr = IOUtils.lineIterator(fis, "utf-8");
        while (itr.hasNext())
        {
            String line = itr.next();
            String lineTime = line.substring(0, 19);
            String str=line.substring(20);
            long time = format.parse(lineTime).getTime();

            if (time >= before_one_hour_time && time <= now_time)
            {
                String str1=line.substring(20);
                return str1;

            }
            else
            {
                return null;
            }
        }
        return null;
    }