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<!DOCTYPE HTML>
<html lang="zh-CN">
<head><meta name="generator" content="Hexo 3.9.0">
<meta charset="utf-8">
<meta name="keywords" content="taotao-blog">
<meta name="description" content>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta name="renderer" content="webkit|ie-stand|ie-comp">
<meta name="mobile-web-app-capable" content="yes">
<meta name="format-detection" content="telephone=no">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
<!-- Global site tag (gtag.js) - Google Analytics -->
<title>taotao-blog</title>
<link rel="icon" type="image/png" href="/favicon.png">
<link rel="stylesheet" type="text/css" href="/libs/awesome/css/all.css">
<link rel="stylesheet" type="text/css" href="/libs/materialize/materialize.min.css">
<link rel="stylesheet" type="text/css" href="/libs/aos/aos.css">
<link rel="stylesheet" type="text/css" href="/libs/animate/animate.min.css">
<link rel="stylesheet" type="text/css" href="/libs/lightGallery/css/lightgallery.min.css">
<link rel="stylesheet" type="text/css" href="/css/matery.css">
<link rel="stylesheet" type="text/css" href="/css/my.css">
<script src="/libs/jquery/jquery.min.js"></script>
<link rel="stylesheet" href="/css/prism-tomorrow.css" type="text/css"></head>
<body>
<header class="navbar-fixed">
<nav id="headNav" class="bg-color nav-transparent">
<div id="navContainer" class="nav-wrapper container">
<div class="brand-logo">
<a href="/" class="waves-effect waves-light">
<img src="/medias/logo.png" class="logo-img" alt="LOGO">
<span class="logo-span">taotao-blog</span>
</a>
</div>
<a href="#" data-target="mobile-nav" class="sidenav-trigger button-collapse"><i class="fas fa-bars"></i></a>
<ul class="right nav-menu">
<li class="hide-on-med-and-down nav-item">
<a href="/" class="waves-effect waves-light">
<i class="fas fa-home" style="zoom: 0.6;"></i>
<span>首页</span>
</a>
</li>
<li class="hide-on-med-and-down nav-item">
<a href="/tags" class="waves-effect waves-light">
<i class="fas fa-tags" style="zoom: 0.6;"></i>
<span>标签</span>
</a>
</li>
<li class="hide-on-med-and-down nav-item">
<a href="/categories" class="waves-effect waves-light">
<i class="fas fa-bookmark" style="zoom: 0.6;"></i>
<span>分类</span>
</a>
</li>
<li class="hide-on-med-and-down nav-item">
<a href="/archives" class="waves-effect waves-light">
<i class="fas fa-archive" style="zoom: 0.6;"></i>
<span>归档</span>
</a>
</li>
<li class="hide-on-med-and-down nav-item">
<a href="/about" class="waves-effect waves-light">
<i class="fas fa-user-circle" style="zoom: 0.6;"></i>
<span>关于</span>
</a>
</li>
<li class="hide-on-med-and-down nav-item">
<a href="/contact" class="waves-effect waves-light">
<i class="fas fa-comments" style="zoom: 0.6;"></i>
<span>留言板</span>
</a>
</li>
<li class="hide-on-med-and-down nav-item">
<a href="/friends" class="waves-effect waves-light">
<i class="fas fa-address-book" style="zoom: 0.6;"></i>
<span>友情链接</span>
</a>
</li>
<li>
<a href="#searchModal" class="modal-trigger waves-effect waves-light">
<i id="searchIcon" class="fas fa-search" title="搜索" style="zoom: 0.85;"></i>
</a>
</li>
</ul>
<div id="mobile-nav" class="side-nav sidenav">
<div class="mobile-head bg-color">
<img src="/medias/logo.png" class="logo-img circle responsive-img">
<div class="logo-name">taotao-blog</div>
<div class="logo-desc">
Never really desperate, only the lost of the soul.
</div>
</div>
<ul class="menu-list mobile-menu-list">
<li class="m-nav-item">
<a href="/" class="waves-effect waves-light">
<i class="fa-fw fas fa-home"></i>
首页
</a>
</li>
<li class="m-nav-item">
<a href="/tags" class="waves-effect waves-light">
<i class="fa-fw fas fa-tags"></i>
标签
</a>
</li>
<li class="m-nav-item">
<a href="/categories" class="waves-effect waves-light">
<i class="fa-fw fas fa-bookmark"></i>
分类
</a>
</li>
<li class="m-nav-item">
<a href="/archives" class="waves-effect waves-light">
<i class="fa-fw fas fa-archive"></i>
归档
</a>
</li>
<li class="m-nav-item">
<a href="/about" class="waves-effect waves-light">
<i class="fa-fw fas fa-user-circle"></i>
关于
</a>
</li>
<li class="m-nav-item">
<a href="/contact" class="waves-effect waves-light">
<i class="fa-fw fas fa-comments"></i>
留言板
</a>
</li>
<li class="m-nav-item">
<a href="/friends" class="waves-effect waves-light">
<i class="fa-fw fas fa-address-book"></i>
友情链接
</a>
</li>
<li><div class="divider"></div></li>
<li>
<a href="https://github.com/TAOTAO-WEB" class="waves-effect waves-light" target="_blank">
<i class="fab fa-github-square fa-fw"></i>Fork Me
</a>
</li>
</ul>
</div>
</div>
<style>
.nav-transparent .github-corner {
display: none !important;
}
.github-corner {
position: absolute;
z-index: 10;
top: 0;
right: 0;
border: 0;
transform: scale(1.1);
}
.github-corner svg {
color: #0f9d58;
fill: #fff;
height: 64px;
width: 64px;
}
.github-corner:hover .octo-arm {
animation: a 0.56s ease-in-out;
}
.github-corner .octo-arm {
animation: none;
}
@keyframes a {
0%,
to {
transform: rotate(0);
}
20%,
60% {
transform: rotate(-25deg);
}
40%,
80% {
transform: rotate(10deg);
}
}
</style>
<a href="https://github.com/TAOTAO-WEB" class="github-corner tooltipped hide-on-med-and-down" target="_blank"
data-tooltip="Fork Me" data-position="left" data-delay="50">
<svg viewBox="0 0 250 250" aria-hidden="true">
<path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>
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fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>
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fill="currentColor" class="octo-body"></path>
</svg>
</a>
</nav>
</header>
<style>
.carousel-control {
width: 45px;
height: 45px;
line-height: 55px;
border-radius: 45px;
background: transparent;
cursor: pointer;
z-index: 100;
}
#prev-cover {
position: absolute;
top: 48%;
left: 8px;
}
#next-cover {
position: absolute;
top: 48%;
right: 8px;;
}
#prev-cover i {
margin-right: 3px;
}
#next-cover i {
margin-left: 3px;
}
.carousel-control:hover {
background-color: rgba(0, 0, 0, .4);
}
.carousel-control i {
color: #fff;
font-size: 2.4rem;
}
</style>
<div class="carousel carousel-slider center index-cover" data-indicators="true" style="margin-top: -64px;">
<div class="carousel-item red white-text bg-cover about-cover">
<div class="container">
<div class="row">
<div class="col s10 offset-s1 m8 offset-m2 l8 offset-l2">
<div class="brand">
<div class="title center-align">
白熊的博客
</div>
<div class="description center-align">
<span id="subtitle"></span>
<script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>
<script>
var typed = new Typed("#subtitle", {
strings: ['从来没有真正的绝境, 只有心灵的迷途','Never really desperate, only the lost of the soul'],
startDelay: 300,
typeSpeed: 100,
loop: true,
backSpeed: 50,
showCursor: true
});
</script>
</div>
</div>
</div>
</div>
<script>
// 每天切换 banner 图. Switch banner image every day.
$('.bg-cover').css('background-image', 'url(/medias/banner/1.jpg)');
</script>
<div class="cover-btns">
<a href="#indexCard" class="waves-effect waves-light btn">
<i class="fa fa-angle-double-down"></i>开始阅读
</a>
<a href="https://github.com/TAOTAO-WEB" class="waves-effect waves-light btn" target="_blank">
<i class="fab fa-github "></i>Fork Me
</a>
</div>
<div class="cover-social-link">
<a href="https://github.com/TAOTAO-WEB" class="tooltipped" target="_blank" data-tooltip="访问我的GitHub" data-position="top" data-delay="50">
<i class="fab fa-github"></i>
</a>
</div>
</div>
</div>
</div>
<script>
$(function () {
let coverSlider = $('.carousel');
//用户触摸轮播自动 restartPlay 是否生效
let initUserPressedOrDraggedActive = false
//用户触摸轮播自动 restartPlay
function initUserPressedOrDragged(instance) {
setInterval(() => {
if (instance.pressed || instance.dragged) {
// console.log('initUserPressedOrDragged: ',instance.pressed,instance.dragged)
restartPlay()
}
}, 1000)
}
coverSlider.carousel({
duration: Number('120'),
fullWidth: true,
indicators: 'true' === 'true',
onCycleTo() {
if (!initUserPressedOrDraggedActive) {
// console.log('initUserPressedOrDraggedActive')
initUserPressedOrDragged(this)
initUserPressedOrDraggedActive = true
}
},
})
let carouselIntervalId;
// Loop to call the next cover article picture.
let autoCarousel = function () {
carouselIntervalId = setInterval(function () {
coverSlider.carousel('next');
}, 5000);
};
autoCarousel();
function restartPlay() {
clearInterval(carouselIntervalId);
autoCarousel();
};
// prev and next cover post.
$('#prev-cover').click(function () {
coverSlider.carousel('prev');
restartPlay();
});
$('#next-cover').click(function () {
coverSlider.carousel('next');
restartPlay();
});
});
</script>
<main class="content">
<div id="indexCard" class="index-card">
<div class="container ">
<div class="card">
<div class="card-content">
<div class="dream">
<div class="title center-align">
<i class="far fa-lightbulb"></i> 我的梦想
</div>
<div class="row">
<div class="col l8 offset-l2 m10 offset-m1 s10 offset-s1 center-align text">
不是每个人都应该像我这样去建造一座水晶大教堂，但是每个人都应该拥有自己的梦想，设计自己的梦想，追求自己的梦想，实现自己的梦想。梦想是生命的灵魂，是心灵的灯塔，是引导人走向成功的信仰。有了崇高的梦想，只要矢志不渝地追求，梦想就会成为现实，奋斗就会变成壮举，生命就会创造奇迹。——罗伯·舒乐
</div>
</div>
</div>
<div id="recommend-sections" class="recommend">
</div>
</div>
</div>
</div>
</div>
<!-- 所有文章卡片 -->
<article id="articles" class="container articles">
<div class="row article-row">
<div class="article col s12 m6 l4" data-aos="zoom-in">
<div class="card">
<a href="/2020/12/18/线程/">
<div class="card-image">
<img src="/medias/featureimages/3.jpg" class="responsive-img" alt="java并发">
<span class="card-title">java并发</span>
</div>
</a>
<div class="card-content article-content">
<div class="summary block-with-text">
守护线程给用户提供服务的线程，例如垃圾处理器
大部分情况守护线程由jvm启动，jvm退出是看有没有用户线程，守护线程是一直存在的，不影响jvm退出。
synchronized和ReentrantLock的区别ReentrantLock是基于
</div>
<div class="publish-info">
<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-12-18
</span>
<span class="publish-author">
<i class="fas fa-user fa-fw"></i>
TaoTao
</span>
</div>
</div>
<div class="card-action article-tags">
<a href="/tags/java/">
<span class="chip bg-color">java</span>
</a>
</div>
</div>
</div>
<div class="article col s12 m6 l4" data-aos="zoom-in">
<div class="card">
<a href="/2020/12/15/排序/">
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<img src="/medias/featureimages/5.jpg" class="responsive-img" alt="排序">
<span class="card-title">排序</span>
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<div class="summary block-with-text">
快速排序 public void quicksort(int[] seqlist,int left,int right){
if(left>right) return;
int middle = divid(
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<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-12-15
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<span class="publish-author">
<i class="fas fa-user fa-fw"></i>
TaoTao
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<div class="card-action article-tags">
<a href="/tags/算法/">
<span class="chip bg-color">算法</span>
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<div class="card">
<a href="/2020/12/15/java常用类库/">
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<img src="/medias/featureimages/18.jpg" class="responsive-img" alt="java常用类库">
<span class="card-title">java常用类库</span>
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<div class="card-content article-content">
<div class="summary block-with-text">
Collectionlist和set
concurrentHashMap
1.8之前采用segement，一个数组中包含多个数组分别加锁，每个segement存储的是数组和链表
1.8之后采取的是和hashmap一样的散列表+链表
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<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-12-15
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<span class="publish-author">
<i class="fas fa-user fa-fw"></i>
TaoTao
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<div class="card-action article-tags">
<a href="/tags/java/">
<span class="chip bg-color">java</span>
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<a href="/2020/12/06/mysql事务/">
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<img src="/medias/featureimages/9.jpg" class="responsive-img" alt="mysql事务并发访问产生的问题和事务隔离机制">
<span class="card-title">mysql事务并发访问产生的问题和事务隔离机制</span>
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<div class="summary block-with-text">
事务隔离级别1.read uncommitted 未提交读事务可以读到其他事务未提交的数据，容易引发脏读
脏读：
读到其他事务未提交的数据，如果另一方事务回滚就会引发错误。
2.read committed 提交读事务只能读到其他事务已经提
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<div class="publish-info">
<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-12-06
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<span class="publish-author">
<i class="fas fa-user fa-fw"></i>
TaoTao
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<div class="card-action article-tags">
<a href="/tags/mysql/">
<span class="chip bg-color">mysql</span>
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<a href="/tags/数据库/">
<span class="chip bg-color">数据库</span>
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<div class="card">
<a href="/2020/12/06/mysql锁/">
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<img src="/medias/featureimages/6.jpg" class="responsive-img" alt="mysql锁-myisam与innodb">
<span class="card-title">mysql锁-myisam与innodb</span>
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</a>
<div class="card-content article-content">
<div class="summary block-with-text">
共享锁（读锁 select操作），排他锁（写锁，更新操作）
在加上写锁时，无法进行读写操作，加上读锁时，可以进行读操作但是不能进行写操作
myisam默认表级锁，不支持行级锁
只要对表中某个范围数据进行写操作，其他范围也无法进行读写操作
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<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-12-06
</span>
<span class="publish-author">
<i class="fas fa-user fa-fw"></i>
TaoTao
</span>
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</div>
<div class="card-action article-tags">
<a href="/tags/mysql/">
<span class="chip bg-color">mysql</span>
</a>
<a href="/tags/数据库/">
<span class="chip bg-color">数据库</span>
</a>
</div>
</div>
</div>
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<div class="card">
<a href="/2020/12/06/mysql索引/">
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<img src="/medias/featureimages/5.jpg" class="responsive-img" alt="mysql索引">
<span class="card-title">mysql索引</span>
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</a>
<div class="card-content article-content">
<div class="summary block-with-text">
聚簇索引与非聚簇索引举例参考自https://blog.csdn.net/qq_20143059/article/details/82809712
innodb中索引与数据一起存放到.idb，mylsam则是分开存放到.myi和.myd（索
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<div class="publish-info">
<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-12-06
</span>
<span class="publish-author">
<i class="fas fa-user fa-fw"></i>
TaoTao
</span>
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</div>
<div class="card-action article-tags">
<a href="/tags/mysql/">
<span class="chip bg-color">mysql</span>
</a>
<a href="/tags/数据库/">
<span class="chip bg-color">数据库</span>
</a>
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</div>
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<div class="card">
<a href="/2020/12/06/redis持久化与查询以及异步队列实现/">
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<img src="/medias/featureimages/9.jpg" class="responsive-img" alt="redis持久化与查询以及异步队列和分布式锁实现">
<span class="card-title">redis持久化与查询以及异步队列和分布式锁实现</span>
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</a>
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<div class="summary block-with-text">
redis查询数据keys [pattern]KEYS * 匹配数据库中所有key
小量数据还好，但是keys [pattern]如果遇到大量数据会对服务器造成不小负担，这个命令会逐条打印，一次性返回所有匹配值，没有限制大小，一次性打印几w
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<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-12-06
</span>
<span class="publish-author">
<i class="fas fa-user fa-fw"></i>
TaoTao
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</div>
<div class="card-action article-tags">
<a href="/tags/数据库/">
<span class="chip bg-color">数据库</span>
</a>
<a href="/tags/nosql/">
<span class="chip bg-color">nosql</span>
</a>
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</div>
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<a href="/2020/07/22/算法/">
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<img src="/medias/featureimages/15.jpg" class="responsive-img" alt="算法小记">
<span class="card-title">算法小记</span>
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<div class="summary block-with-text">
动态规划问题动态规划问题可以视作为带备忘录的暴力迭代，这类问题存在重叠子问题，动态规划问题一定具有最优子结构，通过子问题的最值得出原问题的最值。要符合「最优子结构」，子问题间必须互相独立。
只有列出正确的状态转换方程才能正确的穷举
例题
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<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-07-22
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<i class="fas fa-user fa-fw"></i>
TaoTao
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<div class="card-action article-tags">
<a href="/tags/算法/">
<span class="chip bg-color">算法</span>
</a>
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</div>
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<a href="/2020/07/20/redis基础命令/">
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<img src="/medias/featureimages/16.jpg" class="responsive-img" alt="redis基础命令">
<span class="card-title">redis基础命令</span>
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环境
初学redis，对于redis的基础命令进行一下记录
个人是在阿里云服务器上用docker配置环境，docker相对比较方便.. 配置好后一行命令进入redis
docker exec -it myredis redis-cli
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<span class="publish-date">
<i class="far fa-clock fa-fw icon-date"></i>2020-07-20
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<i class="fas fa-user fa-fw"></i>
TaoTao
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<a href="/tags/数据库/">
<span class="chip bg-color">数据库</span>
</a>
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<span class="chip bg-color">nosql</span>
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</div>
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<a href="/2020/04/20/axios实现访问后台接口/">
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<img src="/medias/featureimages/2.jpg" class="responsive-img" alt="axios实现vue访问后端接口数据">
<span class="card-title">axios实现vue访问后端接口数据</span>
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<div class="card-content article-content">
<div class="summary block-with-text">
在实现交互式网站过程中，前端需要去获取后台的数据，在前端vue框架中一般建议使用axios来获取数据。
安装在项目里使用前需要先下载，只需要用npm一行命令
npm install axios除此之外为了后期方便处理数据，还建议用qs库，一
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