Biegral Blog

刚好写到需要获取数据库中当前月的所有记录，所以将该功能记下来！

        Calendar c = Calendar.getInstance();
        c.add(Calendar.MONTH, 0);
        c.set(Calendar.DAY_OF_MONTH, 1);//设置为1号,当前日期既为本月第一天
        //将小时至0
        c.set(Calendar.HOUR_OF_DAY, 0);
        //将分钟至0
        c.set(Calendar.MINUTE, 0);
        //将秒至0
        c.set(Calendar.SECOND,0);
        //将毫秒至0
        c.set(Calendar.MILLISECOND, 0);
        // 获取本月第一天的时间戳
        System.out.println(c.getTimeInMillis());

        //获取当前月最后一天
        Calendar ca = Calendar.getInstance();
        ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));
        //将小时至0
        ca.set(Calendar.HOUR_OF_DAY, 0);
        //将分钟至0
        ca.set(Calendar.MINUTE, 0);
        //将秒至0
        ca.set(Calendar.SECOND,0);
        //将毫秒至0
        ca.set(Calendar.MILLISECOND, 0);
        // 获取本月最后一天的时间戳
        System.out.println(ca.getTimeInMillis());