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<h2 class="index-header">
<a href="/posts/1d109e15c183/" target="_self">
1.从0-1构建项目
</a>
</h2>
<a class="index-excerpt index-excerpt__noimg" href="/posts/1d109e15c183/" target="_self">
<div>
前言本文旨在如何从pom依赖，模块开始构建项目，未涉及spring cloud等，如需，请看其它文章。 环境 IDEA 2024.3 JDK 17 Maven 3.8.1 准备工作框架版本这里使用的是spring boot + spring cloud + spring alibab cloud。 版本对照表： Spring Cloud Alibaba Version Spring Clo
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<time datetime="2025-02-28 15:00" pubdate>
2025-02-28
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<a href="/categories/java/" class="category-chain-item">java</a>
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<a href="/categories/java/spring/" class="category-chain-item">spring</a>
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<a href="/categories/java/spring/spring-boot/" class="category-chain-item">spring boot</a>
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<a href="/tags/java%EF%BC%8Cspring-boot/">#java，spring boot</a>
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<article class="col-12 col-md-12 mx-auto index-info">
<h2 class="index-header">
<a href="/posts/a06f3a05f609/" target="_self">
4.多重背包问题I
</a>
</h2>
<a class="index-excerpt index-excerpt__noimg" href="/posts/a06f3a05f609/" target="_self">
<div>
题目有 N 种物品和一个容量是 V 的背包。 第 i 种物品最多有 si 件，每件体积是 vi，价值是 wi。 求解将哪些物品装入背包，可使物品体积总和不超过背包容量，且价值总和最大。输出最大价值。 输入格式第一行两个整数，N，V，用空格隔开，分别表示物品种数和背包容积。 接下来有 N 行，每行三个整数 vi,wi,si，用空格隔开，分别表示第 i 种物品的体积、价值和数量。 输出格式输出一个整数
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<time datetime="2025-02-22 01:43" pubdate>
2025-02-22
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<a href="/categories/algorithm/" class="category-chain-item">algorithm</a>
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<a href="/categories/algorithm/acwing/" class="category-chain-item">acwing</a>
</span>
</span>
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<a href="/tags/algorithm/">#algorithm</a>
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<h2 class="index-header">
<a href="/posts/682e584302ea/" target="_self">
1.mysql剖析之架构篇
</a>
</h2>
<a class="index-excerpt index-excerpt__noimg" href="/posts/682e584302ea/" target="_self">
<div>
前言 本文旨在总结MySQL8.0的架构图 mysql架构体系官方mysql8.0的简易架构图，如下： 由上到下，mysql架构分为4层： 应用层/连接层 服务层 存储引擎层 系统文件层 应用层/连接层提供了用于应用程序连接mysql服务的接口。 还提供多种适配多种语言的接口，如：Go、JDBC、Python等。 服务层服务层也叫mysqld，是mysql架构中最核心的。
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<i class="iconfont icon-date"></i>
<time datetime="2025-02-17 14:16" pubdate>
2025-02-17
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</span>
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<a href="/tags/mysql/">#mysql</a>
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<a href="/posts/47fd723b1360/" target="_self">
泛型
</a>
</h2>
<a class="index-excerpt index-excerpt__noimg" href="/posts/47fd723b1360/" target="_self">
<div>
前言泛型generics在Go1.18版本中正式发布，其设计在我看来，较Java的泛型来说自由度更高。 泛型的基本概念什么是泛型？为什么要使用泛型？泛型，即参数化类型。 以函数举例，函数的参数可分为形参和实参。 函数上定义的是形参，函数外传入的是实参。 一般情况下，函数的形参的类型是确定的，在调用函数时，需要传入对应形参的类型的变量（实参），如果传入的实参和形参类型不匹配，则会报错。 那什么是参数
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<time datetime="2025-02-11 23:54" pubdate>
2025-02-11
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<h2 class="index-header">
<a href="/posts/c54bb4f8c93f/" target="_self">
mysql杂记
</a>
</h2>
<a class="index-excerpt index-excerpt__noimg" href="/posts/c54bb4f8c93f/" target="_self">
<div>
1. mysql不设计主键时，是如何处理的？1. 生成隐式主键mysql的默认存储引擎是InnoDB，那么就按以下优先级选择一个隐式主键。 唯一非空索引：如果表中存在一个或多个UNIQUE NOT NULL的索引，那么InnoDB就会选择第一个符合条件的唯一非空索引作为隐式主键。 自动生成隐式主键：如果没有符合条件的唯一非空索引，InnoDB会隐式创建一个6个字节的ROW_ID作为主键，该主键对
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2025-02-09
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人工智能学习路线
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基础知识数学基础Python机器学习 吴恩达 机器学习 coursera 课程主页：有监督的机器学习：回归与分类 | Coursera 笔记及作业：GitHub - fengdu78/Coursera-ML-AndrewNg-Notes: 吴恩达老师的机器学习课程个人笔记 吴恩达 CS229 课程主页：CS229: Machine Learning 国内：【斯坦福大学】CS229
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2024-12-26
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4.通道
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goroutine和channel是go并发的两大基石。 4.1 CSP是什么？Do not communicate by share memory；instead，share memory by communicating. 不要通过共享内存来通信，而是通过通信来实现共享内存。 CSP，全称Communicating Sequential Processes，通信顺序进程。
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3.数据容器
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数组和切片1. 数组和切片有何异同?切片本质是对数组的封装，描述一个数组的片段。
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2.延迟语句
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2.1 延迟语句是什么？defer是Go语言提供的一种用于注册延迟调用的机制：让函数或语句可以在当前函数执行完毕后（包括提供return正常结束或者panic导致的异常结束）执行。 应用场景： 打开连接/关闭连接 加锁/释放锁 打开文件/关闭文件 延迟关闭资源时，注意先判断资源是否为nil， 如: 1234567f,err:=os.Open(filename)i
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1.逃逸分析
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1.1 逃逸分析是什么？在编译原理中，分析指针动态范围的方法被称为逃逸分析。 当一个对象的指针被多个方法或线程引用时，则称这个指针发生了逃逸。 逃逸分析决定了一个变量是分配到堆上还是分配到栈上。 1.2 逃逸分析有什么作用？简单来说，逃逸分析把变量合理地分配到它该去的地方。 一般情况下，使用new函数申请到的内存，如果编译器发现该内存在退出函数后就没有被使用，那就分配到栈上； 如果在函数之外还有其
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