<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qq_64749566的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qq_64749566</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qq_64749566]]></copyright><item><title><![CDATA[记录下常用docker命令]]></title><link>https://blog.youkuaiyun.com/qq_64749566/article/details/146449074</link><guid>https://blog.youkuaiyun.com/qq_64749566/article/details/146449074</guid><author>qq_64749566</author><pubDate>Sun, 23 Mar 2025 00:31:38 +0800</pubDate><description><![CDATA[【代码】记录下常用docker命令。]]></description><category></category></item><item><title><![CDATA[error com.alibaba.druid.pool.DruidDataSource : create connection SQLException, ]]></title><link>https://blog.youkuaiyun.com/qq_64749566/article/details/146448988</link><guid>https://blog.youkuaiyun.com/qq_64749566/article/details/146448988</guid><author>qq_64749566</author><pubDate>Sat, 22 Mar 2025 23:59:56 +0800</pubDate><description><![CDATA[docker 部署seata,mysql账号密码正确，但数据库连接失败。]]></description><category></category></item><item><title><![CDATA[xxxx-1.0-SNAPSHOT.jar中没有主清单属性]]></title><link>https://blog.youkuaiyun.com/qq_64749566/article/details/142497683</link><guid>https://blog.youkuaiyun.com/qq_64749566/article/details/142497683</guid><author>qq_64749566</author><pubDate>Tue, 24 Sep 2024 21:24:13 +0800</pubDate><description><![CDATA[今天在用dos窗口运行一个demo的jar包，出现了没有主清单属性，用了网上一些方法更改pom.xml没有成功，最后将jdk版本都更换到了17，可以运行成功。setting修改如下。]]></description><category></category></item><item><title><![CDATA[redis学习记录]]></title><link>https://blog.youkuaiyun.com/qq_64749566/article/details/139337892</link><guid>https://blog.youkuaiyun.com/qq_64749566/article/details/139337892</guid><author>qq_64749566</author><pubDate>Fri, 31 May 2024 01:05:54 +0800</pubDate><description><![CDATA[查询的时候，从redis取出数据后判断时间是否过期，如果过期则开通另外一个践程进行数据同步，当前线程正常返回数据，这个数据不是最新的。①解决方案一：用互斥锁：当缓存失效时，不立即去访问数据库，先使用如Redis的sentnx方法去设置一个互斥锁,当操作成功返回时再进行访问数据库的操作并回设缓存，否则重试get缓存的方法。缓存击穿：给某一个key设置了过期时间，当key过期的时候，恰好这时间点对这个key有大量的并发请求过来，这些并发的请求可能会瞬间把DB压垮。2.   什么是缓存击穿，怎么解决。]]></description><category></category></item><item><title><![CDATA[Result type not match for select id=“queryByAge“ srcType: com.atguigu.pojo.User2 targetType: com.atg]]></title><link>https://blog.youkuaiyun.com/qq_64749566/article/details/137379879</link><guid>https://blog.youkuaiyun.com/qq_64749566/article/details/137379879</guid><author>qq_64749566</author><pubDate>Thu, 04 Apr 2024 18:51:14 +0800</pubDate><description><![CDATA[Mapper层的方法名爆红，但程序可运行得到正确结果。]]></description><category></category></item><item><title><![CDATA[springboot和mybatis整合使用返回数据为null]]></title><link>https://blog.youkuaiyun.com/qq_64749566/article/details/137198860</link><guid>https://blog.youkuaiyun.com/qq_64749566/article/details/137198860</guid><author>qq_64749566</author><pubDate>Sun, 31 Mar 2024 14:10:03 +0800</pubDate><description><![CDATA[springboot和mybatis整合使用返回数据库为null]]></description><category></category></item><item><title><![CDATA[查找MySQLdata文件夹]]></title><link>https://blog.youkuaiyun.com/qq_64749566/article/details/134619719</link><guid>https://blog.youkuaiyun.com/qq_64749566/article/details/134619719</guid><author>qq_64749566</author><pubDate>Sat, 25 Nov 2023 20:35:23 +0800</pubDate><description><![CDATA[show variables like '%datadir%';]]></description><category></category></item></channel></rss>