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‎2022/09/07/MySql/index.html

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@@ -921,6 +921,7 @@ <h4 id="面试题"><a href="#面试题" class="headerlink" title="面试题"></a
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<li>相对于二叉树，层级更少，搜索效率高</li>
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<li>对于 B-Tree，无论是叶子节点还是非叶子节点，都会保存数据，这样导致一页中存储的键值减少，指针也跟着减少，要同样保存大量数据，只能增加树的高度，导致性能降低</li>
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<li>相对于 Hash 索引，B+Tree 支持范围匹配及排序操作</li>
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<li>必看：<a href="https://blog.csdn.net/qq_37102984/article/details/124296196" target="_blank" rel="noopener">https://blog.csdn.net/qq_37102984/article/details/124296196</a></li>
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</ul>
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<h3 id="索引分类"><a href="#索引分类" class="headerlink" title="索引分类"></a>索引分类</h3><table>
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<thead>

‎2023/02/20/注解@ConfigurationProperties使用方法/index.html

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noSupport: '浏览器不支持'
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}
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} </script></head><body><canvas class="fireworks"></canvas><i class="fa fa-arrow-right" id="toggle-sidebar" aria-hidden="true"></i><div id="sidebar"><div class="toggle-sidebar-info text-center"><span data-toggle="切换文章详情">切换站点概览</span><hr></div><div class="sidebar-toc"><div class="sidebar-toc__title">目录</div><div class="sidebar-toc__progress"><span class="progress-notice">你已经读了</span><span class="progress-num">0</span><span class="progress-percentage">%</span><div class="sidebar-toc__progress-bar"></div></div><div class="sidebar-toc__content"><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#ConfigurationProperties"><span class="toc-number">1.</span> <span class="toc-text">@ConfigurationProperties</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#作用于方法"><span class="toc-number">2.</span> <span class="toc-text">作用于方法</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#配置文件内容"><span class="toc-number">2.1.</span> <span class="toc-text">配置文件内容</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#java代码"><span class="toc-number">2.2.</span> <span class="toc-text">java代码</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#作用于Class类及其用法"><span class="toc-number">3.</span> <span class="toc-text">作用于Class类及其用法</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#配置文件内容-1"><span class="toc-number">3.1.</span> <span class="toc-text">配置文件内容</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#java代码-1"><span class="toc-number">3.2.</span> <span class="toc-text">java代码</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#用法"><span class="toc-number">3.3.</span> <span class="toc-text">用法</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#总结"><span class="toc-number">4.</span> <span class="toc-text">总结</span></a></li></ol></div></div><div class="author-info hide"><div class="author-info__avatar text-center"><img src="https://images5.alphacoders.com/423/423529.jpg"></div><div class="author-info__name text-center">GeYu</div><div class="author-info__description text-center">Do what you want to do !</div><div class="follow-button"><a href="https://github.com/NUISTGY">Follow Me</a></div><hr><div class="author-info-articles"><a class="author-info-articles__archives article-meta" href="/archives"><span class="pull-left">文章</span><span class="pull-right">223</span></a><a class="author-info-articles__tags article-meta" href="/tags"><span class="pull-left">标签</span><span class="pull-right">79</span></a><a class="author-info-articles__categories article-meta" href="/categories"><span class="pull-left">分类</span><span class="pull-right">43</span></a></div></div></div><div id="content-outer"><div id="top-container" style="background-image: url(https://i.328888.xyz/2022/12/21/ARudF.png)"><div id="page-header"><span class="pull-left"> <a id="site-name" href="/">Yu's Blog</a></span><i class="fa fa-bars toggle-menu pull-right" aria-hidden="true"></i><span class="pull-right menus"><a class="site-page" href="/">Home</a><a class="site-page" href="/archives">Archives</a><a class="site-page" href="/tags">Tags</a><a class="site-page" href="/categories">Categories</a><a class="site-page" href="/about">About</a></span></div><div id="post-info"><div id="post-title">Spring中@ConfigurationProperties的使用方法</div><div id="post-meta"><time class="post-meta__date"><i class="fa fa-calendar" aria-hidden="true"></i> 2023-02-20</time><span class="post-meta__separator">|</span><i class="fa fa-inbox post-meta__icon" aria-hidden="true"></i><a class="post-meta__categories" href="/categories/Spring/">Spring</a><div class="post-meta-wordcount"><span>字数总计: </span><span class="word-count">944</span><span class="post-meta__separator">|</span><span>阅读时长: 4 分钟</span></div></div></div></div><div class="layout" id="content-inner"><article id="post"><div class="article-container" id="post-content"><script src="/assets/js/APlayer.min.js"> </script><h2 id="ConfigurationProperties"><a href="#ConfigurationProperties" class="headerlink" title="@ConfigurationProperties"></a>@ConfigurationProperties</h2><p>Spring源码中大量使用了ConfigurationProperties注解，比如<code>server.port</code>就是由该注解获取到的，通过与其他注解配合使用，能够实现Bean的按需配置。</p>
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} </script></head><body><canvas class="fireworks"></canvas><i class="fa fa-arrow-right" id="toggle-sidebar" aria-hidden="true"></i><div id="sidebar"><div class="toggle-sidebar-info text-center"><span data-toggle="切换文章详情">切换站点概览</span><hr></div><div class="sidebar-toc"><div class="sidebar-toc__title">目录</div><div class="sidebar-toc__progress"><span class="progress-notice">你已经读了</span><span class="progress-num">0</span><span class="progress-percentage">%</span><div class="sidebar-toc__progress-bar"></div></div><div class="sidebar-toc__content"><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#ConfigurationProperties"><span class="toc-number">1.</span> <span class="toc-text">@ConfigurationProperties</span></a></li><li class="toc-item toc-level-2"><a class="toc-link" href="#作用于方法"><span class="toc-number">2.</span> <span class="toc-text">作用于方法</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#配置文件内容"><span class="toc-number">2.1.</span> <span class="toc-text">配置文件内容</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#java代码"><span class="toc-number">2.2.</span> <span class="toc-text">java代码</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#作用于Class类及其用法"><span class="toc-number">3.</span> <span class="toc-text">作用于Class类及其用法</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#配置文件内容-1"><span class="toc-number">3.1.</span> <span class="toc-text">配置文件内容</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#java代码-1"><span class="toc-number">3.2.</span> <span class="toc-text">java代码</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#用法"><span class="toc-number">3.3.</span> <span class="toc-text">用法</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#总结"><span class="toc-number">4.</span> <span class="toc-text">总结</span></a></li></ol></div></div><div class="author-info hide"><div class="author-info__avatar text-center"><img src="https://images5.alphacoders.com/423/423529.jpg"></div><div class="author-info__name text-center">GeYu</div><div class="author-info__description text-center">Do what you want to do !</div><div class="follow-button"><a href="https://github.com/NUISTGY">Follow Me</a></div><hr><div class="author-info-articles"><a class="author-info-articles__archives article-meta" href="/archives"><span class="pull-left">文章</span><span class="pull-right">223</span></a><a class="author-info-articles__tags article-meta" href="/tags"><span class="pull-left">标签</span><span class="pull-right">79</span></a><a class="author-info-articles__categories article-meta" href="/categories"><span class="pull-left">分类</span><span class="pull-right">43</span></a></div></div></div><div id="content-outer"><div id="top-container" style="background-image: url(https://i.328888.xyz/2022/12/21/ARudF.png)"><div id="page-header"><span class="pull-left"> <a id="site-name" href="/">Yu's Blog</a></span><i class="fa fa-bars toggle-menu pull-right" aria-hidden="true"></i><span class="pull-right menus"><a class="site-page" href="/">Home</a><a class="site-page" href="/archives">Archives</a><a class="site-page" href="/tags">Tags</a><a class="site-page" href="/categories">Categories</a><a class="site-page" href="/about">About</a></span></div><div id="post-info"><div id="post-title">Spring中@ConfigurationProperties的使用方法</div><div id="post-meta"><time class="post-meta__date"><i class="fa fa-calendar" aria-hidden="true"></i> 2023-02-20</time><span class="post-meta__separator">|</span><i class="fa fa-inbox post-meta__icon" aria-hidden="true"></i><a class="post-meta__categories" href="/categories/Spring/">Spring</a><div class="post-meta-wordcount"><span>字数总计: </span><span class="word-count">951</span><span class="post-meta__separator">|</span><span>阅读时长: 4 分钟</span></div></div></div></div><div class="layout" id="content-inner"><article id="post"><div class="article-container" id="post-content"><script src="/assets/js/APlayer.min.js"> </script><blockquote>
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<p>补充：<a href="https://zhangxiaofan.blog.csdn.net/article/details/104429497?spm=1001.2101.3001.6650.5&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-5-104429497-blog-122876462.235%5Ev38%5Epc_relevant_anti_t3_base&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EBlogCommendFromBaidu%7ERate-5-104429497-blog-122876462.235%5Ev38%5Epc_relevant_anti_t3_base&utm_relevant_index=6" target="_blank" rel="noopener">@EnableConfigurationProperties注解作用</a></p>
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</blockquote>
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<h2 id="ConfigurationProperties"><a href="#ConfigurationProperties" class="headerlink" title="@ConfigurationProperties"></a>@ConfigurationProperties</h2><p>Spring源码中大量使用了ConfigurationProperties注解，比如<code>server.port</code>就是由该注解获取到的，通过与其他注解配合使用，能够实现Bean的按需配置。</p>
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<p>该注解有一个prefix属性，通过指定的前缀，绑定配置文件中的配置，该注解可以放在类上，也可以放在方法上。</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">//</span></span><br><span class="line"><span class="comment">// Source code recreated from a .class file by IntelliJ IDEA</span></span><br><span class="line"><span class="comment">// (powered by FernFlower decompiler)</span></span><br><span class="line"><span class="comment">//</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">package</span> org.springframework.boot.context.properties;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.Documented;</span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.ElementType;</span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.Retention;</span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.RetentionPolicy;</span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.Target;</span><br><span class="line"><span class="keyword">import</span> org.springframework.core.annotation.AliasFor;</span><br><span class="line"><span class="keyword">import</span> org.springframework.stereotype.Indexed;</span><br><span class="line"></span><br><span class="line"><span class="meta">@Target</span>(&#123;ElementType.TYPE, ElementType.METHOD&#125;)</span><br><span class="line"><span class="meta">@Retention</span>(RetentionPolicy.RUNTIME)</span><br><span class="line"><span class="meta">@Documented</span></span><br><span class="line"><span class="meta">@Indexed</span></span><br><span class="line"><span class="keyword">public</span> <span class="meta">@interface</span> ConfigurationProperties &#123;</span><br><span class="line"> <span class="meta">@AliasFor</span>(<span class="string">"prefix"</span>)</span><br><span class="line"> <span class="function">String <span class="title">value</span><span class="params">()</span> <span class="keyword">default</span> ""</span>;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@AliasFor</span>(<span class="string">"value"</span>)</span><br><span class="line"> <span class="function">String <span class="title">prefix</span><span class="params">()</span> <span class="keyword">default</span> ""</span>;</span><br><span class="line"></span><br><span class="line"> <span class="function"><span class="keyword">boolean</span> <span class="title">ignoreInvalidFields</span><span class="params">()</span> <span class="keyword">default</span> <span class="keyword">false</span></span>;</span><br><span class="line"></span><br><span class="line"> <span class="function"><span class="keyword">boolean</span> <span class="title">ignoreUnknownFields</span><span class="params">()</span> <span class="keyword">default</span> <span class="keyword">true</span></span>;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>
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‎2023/05/04/JUC-线程池技术/index.html

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<li>任务队列：用于存放待处理的任务，提供一种缓冲机制</li>
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</ul>
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<p>Java 中的线程池是通过JDK提供的 Executor 框架实现的，该框架中用到了 Executor，Executors（工具类）， ExecutorService，ThreadPoolExecutor ，Callable 和 Future、FutureTask ，ScheduledThreadPoolExecutor等几个类。</p>
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<p><strong>线程池的状态：</strong></p>
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<p><strong>线程池的状态：</strong> </p>
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<blockquote>
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<p><a href="https://www.51cto.com/article/704618.html" target="_blank" rel="noopener">线程池状态转换</a></p>
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</blockquote>
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<p>CPU 密集型简单理解就是利用 CPU 计算能力的任务比如在内存中对大量数据进行分析</p>
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</li>
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<li><p><strong>I/O 密集型任务：</strong> 这种系统 CPU 处于阻塞状态，用大部分的时间来处理 I/O 交互，而线程在处理 I/O 的时间段内不会占用 CPU 来处理，这时就可以将 CPU 交出给其它线程使用，因此在 I/O 密集型任务的应用中，我们可以多配置一些线程，具体的计算方法是 2N 或 CPU 核数/ (1-阻塞系数)，阻塞系数在 0.8~0.9 之间</p>
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<p>IO 密集型就是涉及到网络读取，文件读取此类任务 ，特点是 CPU 计算耗费时间相比于等待 IO 操作完成的时间来说很少，大部分时间都花在了等待 IO 操作完成上</p>
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<p>IO 密集型就是涉及到网络读取，文件读取此类任务 ，特点是 CPU 计算耗费时间相比于等待 IO 操作完成的时间来说很少，大部分时间都花在了等待 IO 操作完成上 </p>
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</div></article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">GeYu</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="https://nuistgy.github.io/2023/05/04/JUC-线程池技术/">https://nuistgy.github.io/2023/05/04/JUC-线程池技术/</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="https://nuistgy.github.io">Yu's Blog</a>！</span></div></div><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/Java/">Java</a><a class="post-meta__tags" href="/tags/并发编程/">并发编程</a><a class="post-meta__tags" href="/tags/JUC/">JUC</a></div><div class="addthis_inline_share_toolbox pull-right"></div><script src="//s7.addthis.com/js/300/addthis_widget.js#pubid=ra-5befa2f76de7c6b5" async></script><nav id="pagination"><div class="prev-post pull-left"><a href="/2023/05/05/MySQL-InnoDB-基本架构/"><i class="fa fa-chevron-left"> </i><span>MySQL-InnoDB基本架构</span></a></div><div class="next-post pull-right"><a href="/2023/04/25/JUC-Unsafe/"><span>JUC-Unsafe简介</span><i class="fa fa-chevron-right"></i></a></div></nav></div></div><footer class="footer-bg" style="background-image: url(https://i.328888.xyz/2022/12/21/ARudF.png)"><div class="layout" id="footer"><div class="copyright">&copy;2015 - 2023 By GeYu</div><div class="framework-info"><span>驱动 - </span><a href="http://hexo.io"><span>Hexo</span></a><span class="footer-separator">|</span><span>主题 - </span><a href="https://github.com/Molunerfinn/hexo-theme-melody"><span>Melody</span></a></div><div class="footer_custom_text">Enjoy the cyber world!</div><div class="busuanzi"><script async src="//busuanzi.ibruce.info/busuanzi/2.3/busuanzi.pure.mini.js"></script><span id="busuanzi_container_site_uv"><i class="fa fa-user"></i><span id="busuanzi_value_site_uv"></span><span></span></span><span class="footer-separator">|</span><span id="busuanzi_container_site_pv"><i class="fa fa-eye"></i><span id="busuanzi_value_site_pv"></span><span></span></span></div></div></footer><i class="fa fa-arrow-up" id="go-up" aria-hidden="true"></i><script src="https://cdn.jsdelivr.net/npm/animejs@latest/anime.min.js"></script><script src="https://cdn.jsdelivr.net/npm/jquery@latest/dist/jquery.min.js"></script><script src="https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@latest/dist/jquery.fancybox.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-animate@latest/velocity.min.js"></script><script src="https://cdn.jsdelivr.net/npm/velocity-ui-pack@latest/velocity.ui.min.js"></script><script src="/js/utils.js?version=1.6.1"></script><script src="/js/fancybox.js?version=1.6.1"></script><script src="/js/sidebar.js?version=1.6.1"></script><script src="/js/copy.js?version=1.6.1"></script><script src="/js/fireworks.js?version=1.6.1"></script><script src="/js/transition.js?version=1.6.1"></script><script src="/js/scroll.js?version=1.6.1"></script><script src="/js/head.js?version=1.6.1"></script><script>if(/Android|webOS|iPhone|iPod|BlackBerry/i.test(navigator.userAgent)) {

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