<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[aa287563的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/aa287563</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; aa287563]]></copyright><item><title><![CDATA[MBA-数学]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436013</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436013</guid><author>aa287563</author><pubDate>Thu, 16 May 2019 11:11:00 +0800</pubDate><description><![CDATA[链接：https://pan.baidu.com/s/1GDhvLzWWzXDEV3ArEfz0WA 提取码：zoah 复制这段内容后打开百度网盘手机App，操作更方便哦

转载于:https://www.cnblogs.com/zpbk/p/10874431.html...]]></description><category></category></item><item><title><![CDATA[80端口被占用]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436014</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436014</guid><author>aa287563</author><pubDate>Mon, 18 Mar 2019 10:23:00 +0800</pubDate><description><![CDATA[一天，新项目发布上去，却是莫名其妙的404错误。还以为项目本身有问题，然后发现在本地一切正常。后来以为是服务器的缓存什么的导致失败，那就停止tomcat清work清temp再启动，结果原来可以访问的项目也突然不能访问了，网页地址栏一直在转圈。还以为是原来的项目文件夹和对应的war包不一致导致的，删了war包，一切照旧。万般无奈之下，看了日志，上面写着80端口被占用。这是什么回事？明明每次...]]></description><category></category></item><item><title><![CDATA[linux系统root密码忘了怎么办 三种方法快速找回root密码]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436011</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436011</guid><author>aa287563</author><pubDate>Thu, 10 Jan 2019 14:54:00 +0800</pubDate><description><![CDATA[linux系统root密码忘了怎么办 三种方法快速找回root密码
linux root密码找回方法一　　第1步：在系统进入单用户状态，直接用passwd root去更改。　　第2步：用安装光盘引导系统，进行linux rescue状态，将原来/分区挂接上来,作法如下：　　cd /mnt mkdir hd mount -t auto /dev/hdaX(原来/分区所在的分区号) hd ...]]></description><category></category></item><item><title><![CDATA[px、em、rem、%、vw、wh、vm等单位有什么区别？]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436012</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436012</guid><author>aa287563</author><pubDate>Wed, 09 Jan 2019 10:06:00 +0800</pubDate><description><![CDATA[这里是修真院前端小课堂，每篇分享文从【背景介绍】【知识剖析】【常见问题】【解决方案】【编码实战】【扩展思考】【更多讨论】【参考文献】八个方面深度解析前端知识/技能，本篇分享的是：【px、em、rem、%、vw、wh、vm等单位有什么区别？】1.背景介绍传统的项目开发中，我们只会用到px、%、em这几个单位，它可以适用于大部分的项目开发，并且拥有比较良好的兼容性。但是你知道吗？从css3...]]></description><category></category></item><item><title><![CDATA[知道id如何进入]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436010</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436010</guid><author>aa287563</author><pubDate>Tue, 14 Aug 2018 17:11:00 +0800</pubDate><description><![CDATA[黑客已经成为一种文化，很多人想成为黑客，他们偶尔学到了几种小花招，总喜欢拿别人开玩笑，搞些恶作剧。其实黑客的最高境界在于防守，不在于进攻。所谓明枪易躲暗箭难防，要防住他人所有的进攻，肯定需要懂得比对方更多的系统知识，了解更多的系统漏洞，及如何弥补漏洞。现在满天都是黑客教程，但真正有用的不多，下面介绍一种WIN9X下的入侵方法:

1.取得对方IP地址如XX.XX.XX.XX，方法太...]]></description><category></category></item><item><title><![CDATA[查询两个时间段间隔多久的数据]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436009</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436009</guid><author>aa287563</author><pubDate>Tue, 10 Jul 2018 13:39:00 +0800</pubDate><description><![CDATA[select*fromtbnamewheredatediff(dd,'2008-03-20',getdate())&gt;30天
select*fromtbnamewheredatediff(mm,'2008-04-20',getdate())&gt;0月


转载于:https://www.cnblogs.com/zpbk/p/9288570.h...]]></description><category></category></item><item><title><![CDATA[jsp中的判断]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436007</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436007</guid><author>aa287563</author><pubDate>Wed, 06 Jun 2018 14:01:00 +0800</pubDate><description><![CDATA[【一】 &lt;%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %&gt; 核心标签 &lt;c:if &lt;c:choose &lt;c:when &lt;c:otherwise    &lt;c:url

【二】 &lt;%@ tag...]]></description><category></category></item><item><title><![CDATA[判断手机登陆还是电脑登陆]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436005</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436005</guid><author>aa287563</author><pubDate>Thu, 17 May 2018 18:06:00 +0800</pubDate><description><![CDATA[判断手机登陆还是电脑登陆

转载于:https://www.cnblogs.com/zpbk/p/9052423.html]]></description><category></category></item><item><title><![CDATA[配置pom.xml、spring.xml、spring-mvc.xml、spring-mybatis.xml、web.xml]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436008</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436008</guid><author>aa287563</author><pubDate>Tue, 20 Mar 2018 23:51:00 +0800</pubDate><description><![CDATA[原博客
（1）修改pom.xml文件，引入jar包[html] view plain copy &lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http:/...]]></description><category></category></item><item><title><![CDATA[防止恶意跳转]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436006</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436006</guid><author>aa287563</author><pubDate>Fri, 16 Mar 2018 14:53:00 +0800</pubDate><description><![CDATA[防止恶意跳转

转载于:https://www.cnblogs.com/zpbk/p/8581457.html]]></description><category></category></item><item><title><![CDATA[java中使用连接池的写法]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436003</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436003</guid><author>aa287563</author><pubDate>Mon, 12 Mar 2018 16:59:00 +0800</pubDate><description><![CDATA[s=conn.createStatement();   String sql="SELECT COUNT(*) count from t_wlk where (status=19 or status=0) and department in ('dx','dxft');";   ResultSet rs=s.executeQue...]]></description><category></category></item><item><title><![CDATA[数据库连接超时]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436004</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436004</guid><author>aa287563</author><pubDate>Sun, 11 Mar 2018 18:11:00 +0800</pubDate><description><![CDATA[String url = "jdbc:mysql://*****:3306/wlk?user=root&amp;password=****&amp;characterEncoding=utf8&amp;autoReconnect=true&amp;failOverReadOnly=false&amp;maxReconnects=5";

  String...]]></description><category></category></item><item><title><![CDATA[框架技术]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436002</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436002</guid><author>aa287563</author><pubDate>Thu, 11 Jan 2018 15:33:00 +0800</pubDate><description><![CDATA[Jfinal MVC

转载于:https://www.cnblogs.com/zpbk/p/8268702.html]]></description><category></category></item><item><title><![CDATA[自动挂载数据盘]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436001</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436001</guid><author>aa287563</author><pubDate>Thu, 04 Jan 2018 18:02:00 +0800</pubDate><description><![CDATA[1、自动挂载数据盘您可以参考下文档https://help.aliyun.com/document_detail/25426.html?spm=5176.11065259.1996646101.searchclickresult.73a4898a9a8C8K
文档中的6/7/8步是实现配置fstab文件实现开机自动挂载的

转载于:https://www.cnblogs.com/zpb...]]></description><category></category></item><item><title><![CDATA[获取上月的时间]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102435999</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102435999</guid><author>aa287563</author><pubDate>Mon, 25 Dec 2017 17:21:00 +0800</pubDate><description><![CDATA[1： Calendar calendar=Calendar.getInstance();  calendar.add(Calendar.MONTH,-1);  SimpleDateFormat format = new SimpleDateFormat("yyyy-MM");  String lastDate = format.format(cal...]]></description><category></category></item><item><title><![CDATA[mysql 启动时 提示缺少mysql.sock']]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102436000</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102436000</guid><author>aa287563</author><pubDate>Fri, 15 Dec 2017 17:39:00 +0800</pubDate><description><![CDATA[在根 目录下执行该命令，即可重新生成。
ln -s /var/lib/mysql/mysql.sock 
生成的存放的位置
ln -s /var/lib/mysql/mysql.sock /var/lib/mysql/mysql.sock

赋权限：
chown -R root:mysql /usr/local/mysql/data/. ...]]></description><category></category></item><item><title><![CDATA[linux 自动释放内存-crontab 中的shell定时]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102435997</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102435997</guid><author>aa287563</author><pubDate>Thu, 14 Dec 2017 14:57:00 +0800</pubDate><description><![CDATA[这几天发现linux系统内存一直涨，即使把apache和mysql关闭了，内存也不释放，可以使用以下脚本来释放内存：
脚本内容：

#!/bin/bash
#cache释放：
#Tofreepagecache:
sync
sync
#echo1&gt;/proc/sys/vm/drop_caches
#Tofr...]]></description><category></category></item><item><title><![CDATA[linux 手动释放内存]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102435998</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102435998</guid><author>aa287563</author><pubDate>Thu, 14 Dec 2017 14:22:00 +0800</pubDate><description><![CDATA[查看内存使用情况
1：$ free -m
2：运行sync将dirty的内容写回硬盘
　　$sync
3：通过修改proc系统的drop_caches清理free的cache
　　$echo 3 &gt; /proc/sys/vm/drop_caches



转载于:https://www.cnblogs.com/zpbk/p/8037500.html...]]></description><category></category></item><item><title><![CDATA[SQL查询~ 存在一个表而不在另一个表中的数据]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102435996</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102435996</guid><author>aa287563</author><pubDate>Fri, 08 Dec 2017 17:32:00 +0800</pubDate><description><![CDATA[A、B两表，找出ID字段中，存在A表，但是不存在B表的数据。A表总共13w数据，去重后大约3W条数据，B表有2W条数据，且B表的ID字段有索引。
方法一
　　使用 not in ,容易理解,效率低 ~执行时间为：1.395秒~

1 select distinct A.ID from  A where A.ID not in (select ID from B)

方法二
...]]></description><category></category></item><item><title><![CDATA[王涛的博客]]></title><link>https://blog.youkuaiyun.com/aa287563/article/details/102435995</link><guid>https://blog.youkuaiyun.com/aa287563/article/details/102435995</guid><author>aa287563</author><pubDate>Wed, 15 Nov 2017 09:20:00 +0800</pubDate><description><![CDATA[博客


转载于:https://www.cnblogs.com/zpbk/p/7837301.html]]></description><category></category></item></channel></rss>