<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[wdc0222的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/wdc0222</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; wdc0222]]></copyright><item><title><![CDATA[List与Set的contains方法效率]]></title><link>https://blog.youkuaiyun.com/wdc0222/article/details/109528656</link><guid>https://blog.youkuaiyun.com/wdc0222/article/details/109528656</guid><author>wdc0222</author><pubDate>Fri, 06 Nov 2020 11:33:14 +0800</pubDate><description><![CDATA[会对这个产生疑问是因为最近在leetcode刷BFS的时候，不止一次发现，若在遍历时用List.contains()判断常常会超时，但是将list转为Set的情况下就能ac；于是猜想是否Set的contains()效率要比List要高
网上搜索发现有人做实验，相同的10000个元素，用contains进行判断，Set用了1000ms，List用了19wms，不过没讲原因于是去查看源码
对于List而言，这里以LinkedList为例，其contains()方法：
    public boolean con]]></description><category></category></item><item><title><![CDATA[解决IDEA中Tomcat日志信息的中文乱码]]></title><link>https://blog.youkuaiyun.com/wdc0222/article/details/109516529</link><guid>https://blog.youkuaiyun.com/wdc0222/article/details/109516529</guid><author>wdc0222</author><pubDate>Thu, 05 Nov 2020 17:24:23 +0800</pubDate><description><![CDATA[将IDEA的显示编码修改为UTF-8：IDEA上边菜单栏Help - Edit Custom VM Options ,打开后在结尾添加-Dfile.encoding=UTF-8,重启IDEA。

坑1：试过直接在IntelliJ IDEA 2020.2\bin目录下修改idea64.exe.vmoptions，没有用，要根据上述方法修改才有用
坑2：不要直接修改tomcat目录下conf/logging.properties的java.util.logging.ConsoleHandler.encodin.]]></description><category></category></item><item><title><![CDATA[SpringMVC网页跳转错误500以及tomcat启动发现多个spring-web]]></title><link>https://blog.youkuaiyun.com/wdc0222/article/details/109515945</link><guid>https://blog.youkuaiyun.com/wdc0222/article/details/109515945</guid><author>wdc0222</author><pubDate>Thu, 05 Nov 2020 17:04:24 +0800</pubDate><description><![CDATA[换电脑后电脑装的是java14，我在pom.xml中设置了固定版本
&lt;plugin&gt;
    &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
    &lt;version&gt;3.8.0&lt;/version&gt;
    &lt;configuration&gt;
        &lt;source&gt;1.14&lt;/source&gt;
        &lt;target&gt;1.14&lt;/ta..]]></description><category></category></item><item><title><![CDATA[cmder启动时出现“此处不应有.....”]]></title><link>https://blog.youkuaiyun.com/wdc0222/article/details/108197382</link><guid>https://blog.youkuaiyun.com/wdc0222/article/details/108197382</guid><author>wdc0222</author><pubDate>Mon, 24 Aug 2020 13:19:02 +0800</pubDate><description><![CDATA[cmder在启动时会出现此处不应有“…”，里面是一系列环境变量
解决方法：检查一下环境变量Path，里面有没有某个环境变量的结尾存在；，把这个分号删了就行

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