1.查看是否开启evevt与开启evevt. 1.1.MySQL evevt功能默认是关闭的,可以使用下面的语句来看evevt的状态,如果是OFF或者0,表示是关闭的. show VARIABLES LIKE '%sche%'; 1.2.开启evevt功能 SET GLOBAL event_scheduler = 1; 2.创建定时器的过程 2.1.创建测试表test drop table if exists test; create table test ( id int(11) not nu
<script type="text/javascript"> var orign_time = 1496706400; var leftTime = Date.parse(new Date())/1000;//转化成秒 var maxTime = orign_time-leftTime; function CountDownTime() { if (maxTime >=0) { var days = parseInt(maxTime/60/60/ 24, 10);
l 使能定时器时钟. RCC_APB1PeriphClockCmd(); l 初始化定时器,配置ARR,PSC. TIM_TimeBaseInit(); l 开启定时器中断,配置NVIC. void TIM_ITConfig(); NVIC_Init(); l 使能定时器. TIM_Cmd(); l 编写中断服务函数. TIMx_IRQHandler(); l 源代码: //Tout(溢出时间)=(ARR+1)(PSC+1)/Tclk //500ms -> (4999+1)( 7199+1)/7
window.onload=function(){ setTime(); setInterval('setTime()',1000); } function checkTime(n){ if(n<10){ return "0" +n; }else{ return ""+n; } } function setTime(){ var date=new Date(); var h=checkTime(date.getHours()); var m=checkTime
Spring--quartz中cronExpression The '*' character is used to specify all values. For example, "*" in the minute field means "every minute". “*”字符被用来指定所有的值.如:”*“在分钟的字段域里表示“每分钟”. The '?' character is allowed for the day-of-month and day-of