spring定时任务-文件上传进度条
spring定时任务
导依赖
<!-- https://mvnrepository.com/artifact/org.quartz-scheduler/quartz -->
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>2.2.3</version>
</dependency>
配置定时任务类
package com.atguigu.scw.portal.service;
import org.springframework.stereotype.Service;
@Service
public class ExampleJob {
public void hello() {
System.out.println("定时任务触发===========>");
}
}
配置定时任务
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- <bean id="exampleJob"
class="com.atguigu.scw.portal.service.ExampleJob"></bean> -->
<!--配置定时任务触发类和方法 -->
<bean id="jobDetail"
class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject" ref="exampleJob" />
<property name="targetMethod" value="hello" />
</bean>
<!--配置触发器，指定何时触发 -->
<bean id="cronTrigger"
class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail" ref="jobDetail" />
<!-- run every morning at 6 AM -->
<property name="cronExpression" value="*/5 * * * * ?" />
</bean>
<!--配置定时任务调用哪一个触发器 -->
<bean
class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="cronTrigger" />
</list>
</property>
</bean>
</beans>
cron表达式使用
每隔5秒执行一次：*/5 * * * * ?
每隔1分钟执行一次：0 */1 * * * ?
每天23点执行一次：0 0 23 * * ?
每天凌晨1点执行一次：0 0 1 * * ?
每月1号凌晨1点执行一次：0 0 1 1 * ?
每月最后一天23点执行一次：0 0 23 L * ?
每周星期天凌晨1点实行一次：0 0 1 ? * L
在26分、29分、33分执行一次：0 26,29,33 * * * ?
每天的0点、13点、18点、21点都执行一次：0 0 0,13,18,21 * * ?
参考
文件上传进度条
ajax异步提交表单$("#subBtn").on('click', function() { return false}是js对象的机制
<button type="submit" id='subBtn' class="btn btn-default">Submit</button>点击按钮直接提交是浏览器的机制
文件上传
表单直接提交action='${ctp}/member/upload' method='post' enctype="multipart/form-data"
<form action='${ctp}/member/upload' method='post' enctype="multipart/form-data">
<div class="form-group">
<input type="file" class="form-control" id="file" name='file'>
</div>
<div class="progress">
<div class="progress-bar" role="progressbar" aria-valuenow="60"
aria-valuemin="0" aria-valuemax="100" style="width: 60%;">
60%</div>
</div>
<button type="submit" id='subBtn' class="btn btn-default">Submit</button>
</form>
ajax提交type : "post",contentType : false,processData : false
进度条:获取myXhr = $.ajaxSettings.xhr()对象并返回
<form id='submitForm'>
<div class="form-group">
<input type="file" class="form-control" id="file" name='file'>
</div>
<div class="progress" style='display: none;'>
<div class="progress-bar" role="progressbar" aria-valuenow="0"
aria-valuemin="0" aria-valuemax="100" style="width: 0%;">0%</div>
</div>
<button type="submit" id='subBtn' class="btn btn-default">Submit</button>
</form>
<script type="text/javascript">
$("#subBtn").on('click', function() {
var fd = new FormData($("#submitForm")[0]);
$.ajax({
url : "${ctp}/member/upload",
data : fd,
type : "post",
contentType : false,
processData : false,
//获取ajaxSettings中的xhr对象，为它的upload属性绑定progress事件的处理函数
xhr : function() {
myXhr = $.ajaxSettings.xhr()
//检查upload属性是否存在
if (myXhr.upload) {
//绑定progress事件的回调函数
myXhr.upload.addEventListener('progress',
progressHandlingFunction, false)
}
//xhr对象返回给jQuery使用
return myXhr;
},
success : function(result) {
console.log("result==========>", result)
},
error : function(e) {
console.log('e=========>', e)
}
})
return false
})
var progressHandlingFunction = function(e) {
var curr = e.loaded
var total = e.total
process = curr / total * 100
console.log('上传进度============>', process)
$('.progress').attr('style', 'display:show;')
$('.progress-bar').html(process + '%')
$('.progress-bar').attr('style', 'width:' + process + '%;')
}
</script>
图片预览
$("#ad_file_input").on('change', function(event) {
$(this).empty()
$(this).parent('.form-group').next('.form-group').find('.imgdiv').empty()
fileList = event.currentTarget.files
log('fileList==============>', fileList)
var URL = window.URL || window.webkitURL
var imgURL
//遍历上传的文件进行显示
$.each(fileList, function (index, item) {
//创建一个临时的url地址
imgURL = URL.createObjectURL(item)
log('this=========>',this)
log('item==========>',item)
$('#ad_file_input').parent(".form-group").next(".form-group").find(".imgdiv").append("<img src='"+imgURL+"' style='width:200px;height:220px;'/>").append('<p>'+item.name+'<p>')
})
})
