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<title>知识点总结 › 但行好事,莫问前程</title> | ||
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<h1><a href="/">但行好事,莫问前程</a></h1> | ||
<h2><a href="/">CV工程师,了解面向Google编程的基本原理,有三年使用Google经验,在通往程序员的道路上艰难的爬行着。</a></h2> | ||
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<h1 class="title">知识点总结</h1> | ||
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<time datetime="1919-02-06T00:11:16.000Z">1919-02-06</time> | ||
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<p>总结自己会的知识点和接下来需要学习的东西。<br><a id="more"></a></p> | ||
<h2 id="学习规划"><a href="#学习规划" class="headerlink" title="学习规划"></a>学习规划</h2><h3 id="自己的知识优先级"><a href="#自己的知识优先级" class="headerlink" title="自己的知识优先级"></a>自己的知识优先级</h3><p>英语+数据结构与算法+高等数学 –> 操作系统和计算机网络 –> 网络编程(Web服务器)+Netty+Java基础和JVM+Spring全家桶Web编程。 </p> | ||
<h3 id="2019技术规划-2019-04-02"><a href="#2019技术规划-2019-04-02" class="headerlink" title="2019技术规划 - 2019/04/02"></a>2019技术规划 - 2019/04/02</h3><ol> | ||
<li>结合慕课网的<a href="https://coding.imooc.com/class/chapter/230.html#Anchor" target="_blank" rel="noopener">Java读源码之Netty深入剖析</a>阅读Netty整体代码。</li> | ||
<li>结合Unix网络编程卷一和传智播客的Linux系统编程视频学习netty-transport-native-epoll模块的代码。</li> | ||
<li>结合HTTP权威指南阅读Netty对HTTP协议的基础实现代码,例如HTTP编解码器等。</li> | ||
</ol> | ||
<h2 id="基础部分"><a href="#基础部分" class="headerlink" title="基础部分"></a>基础部分</h2><h3 id="数据结构"><a href="#数据结构" class="headerlink" title="数据结构"></a>数据结构</h3><ul> | ||
<li>时间复杂度与空间复杂度的计算;逻辑结构(集合、线性、树形、图形);存储结构(顺序存储–>数组、链式存储–>链表、索引存储和Hash存储)。</li> | ||
<li>线性结构:线性表;操作受限的线性表(栈和队列);特殊矩阵的压缩存储。</li> | ||
<li>树形结构:满二叉树和完全二叉树;二叉树的遍历(先中后层)和线索二叉;二叉排序(查找)树和平衡二叉树;红黑树;哈夫曼树和哈夫曼编码。</li> | ||
<li>图形结构:无向图、有向图和网络;图的表示方法(邻接矩阵和邻接表);图的遍历(深度优先搜索和广度优先搜索);最小生成树;最短路径问题;拓扑排序;关键路径。<ul> | ||
<li>图的深度优先搜索类似树的先序遍历,广度优先遍历类似树的层序遍历。</li> | ||
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<li>数据查找:顺序查找、折半查找和分块(索引)查找;B树和B+树;散列函数的构造和Hash冲突的解决。</li> | ||
<li>排序算法:插入排序(直接插入、折半插入、希尔排序);交换排序(冒泡排序和快速排序);选择排序(简单选择和堆排序);归并排序;基数排序;外部排序(多路归并排序)。</li> | ||
</ul> | ||
<h3 id="操作系统"><a href="#操作系统" class="headerlink" title="操作系统"></a>操作系统</h3><ul> | ||
<li>进程管理:即CPU管理。进程的切换(状态和转换、PCB);进程同步与数据共享;用户级线程与内核级线程。</li> | ||
<li>内存管理:内存分配(分页、分段);逻辑地址与物理地址;虚拟内存与页面置换算法。</li> | ||
<li>文件管理:文件逻辑结构和目录的实现;磁盘管理与磁盘调度算法。</li> | ||
</ul> | ||
<h3 id="计算机网络"><a href="#计算机网络" class="headerlink" title="计算机网络"></a>计算机网络</h3><ul> | ||
<li>链路层:交换机(MAC地址表);以太网协议;ARP协议。</li> | ||
<li>网际层:路由器(路由表),路由选择算法;IPv4、IPv6和移动IP。</li> | ||
<li>传输层:TCP协议;三次握手四次挥手;保证可靠性(超时重传、滑动窗口);流量控制和拥塞窗口。</li> | ||
</ul> | ||
<h2 id="Java开发部分"><a href="#Java开发部分" class="headerlink" title="Java开发部分"></a>Java开发部分</h2><h3 id="Java基础"><a href="#Java基础" class="headerlink" title="Java基础"></a>Java基础</h3><ul> | ||
<li>Java数据结构:HashMap –> LinkedHashMap –> TreeMap –> ConcurrentHashMap(段锁、CAS)。</li> | ||
<li>Java并发编程:wait()和sleep(long)区别;volatile原理;ThreadLocal原理;同步器(CountDownLatch);synchronized和Lock的区别(可中断锁、tryLock、多个Condition、公平锁);锁升级(偏向锁、轻量级锁、锁自旋);乐观锁(CAS)。</li> | ||
<li>Java虚拟机:GCRoot(静态变量和常量等所引用的变量);Java虚拟机内存划分;Java虚拟机类加载机制(双亲委派模式);判断对象是否死亡(引用计数和可达性分析);Java内存模型。</li> | ||
<li>设计模式:单例、工厂、生产者消费者;代理、迭代器、装饰者;策略和模板方法。</li> | ||
</ul> | ||
<h3 id="开发框架"><a href="#开发框架" class="headerlink" title="开发框架"></a>开发框架</h3><ul> | ||
<li>Spring:IoC(循环依赖);AOP(动态代理和CGLIB);Spring事务(什么时候使用编程实事务、事务隔离级别、事务的传播级别);Spring MVC(请求过程);SpringBoot(依赖优于配置)。</li> | ||
<li>Dubbo:服务治理和服务发现过程;软负载均衡算法(默认是基于权重的随机算法);Dubbo健壮性(注册中心挂了);Dubbo重连问题;Dubbo保证幂等性原理。</li> | ||
<li>Netty:NIO编程(和BIO的区别、epoll机制、水平触发和边缘触发);TCP拆包粘包(特殊分隔符–>换行符、消息头携带消息体长度);TCP长连接(心跳机制确认客户端是否存活)。</li> | ||
</ul> | ||
<h3 id="数据库"><a href="#数据库" class="headerlink" title="数据库"></a>数据库</h3><ul> | ||
<li>MySQL:索引原理(B树、B+树);隔离掉脏读(MVCC)、不可重复读(行锁)和幻读(Gap锁)。</li> | ||
<li>Redis:五种数据类型;过期删除策略;两种持久化方式;内存溢出的控制策略;Redis事务;实现分布式锁。</li> | ||
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