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**面试专版** ：准备面试的小伙伴可以考虑面试专版：[《Java 面试指北 》](https://javaguide.cn/zhuanlan/java-mian-shi-zhi-bei.html) (质量很高，专为面试打造，配合 JavaGuide 食用)。 1. **知识星球** ：专属面试小册/一对一交流/简历修改/专属求职指南，欢迎加入 [JavaGuide 知识星球](https://javaguide.cn/about-the-author/zhishixingqiu-two-years.html)（点击链接即可查看星球的详细介绍，一定一定一定确定自己真的需要再加入，一定一定要看完详细介绍之后再加我）。 2. **转载须知** ：以下所有文章如非文首说明为转载皆为我（Guide 哥）的原创，转载在文首注明出处，如发现恶意抄袭/搬运，会动用法律武器维护自己的权益。让我们一起维护一个良好的技术创作环境！div align=center img src=https://guide-blog-images.oss-cn-shenzhen.aliyuncs.com/github/javaguide/gongzhonghaoxuanchuan.png style=margin: 0 auto; / /div 项目相关* [项目介绍](./docs/javaguide/intro.md)* [贡献指南](./docs/javaguide/contribution-guideline.md)* [常见问题](./docs/javaguide/faq.md)* [项目待办](./docs/javaguide/todo.md) Java 基础**知识点/面试题总结** : (必看:+1: )：- [Java 基础常见知识点&面试题总结(上)](./docs/java/basis/java-basic-questions-01.md)- [Java 基础常见知识点&面试题总结(中)](./docs/java/basis/java-basic-questions-02.md)- [Java 基础常见知识点&面试题总结(下)](./docs/java/basis/java-basic-questions-03.md)**重要知识点详解** ：- [为什么 Java 中只有值传递？](./docs/java/basis/why-there-only-value-passing-in-java.md)- [Java 序列化详解](./docs/java/basis/serialization.md)- [泛型&通配符详解](./docs/java/basis/generics-and-wildcards.md)- [Java 反射机制详解](./docs/java/basis/reflection.md)- [Java 代理模式详解](./docs/java/basis/proxy.md)- [BigDecimal 详解](./docs/java/basis/bigdecimal.md)- [Java 魔法类 Unsafe 详解](./docs/java/basis/unsafe.md)- [Java SPI 机制详解](./docs/java/basis/spi.md)- [Java 语法糖详解](./docs/java/basis/syntactic-sugar.md) 集合**知识点/面试题总结** ：- [Java 集合常见知识点&面试题总结(上)](./docs/java/collection/java-collection-questions-01.md) (必看 :+1:)- [Java 集合常见知识点&面试题总结(下)](./docs/java/collection/java-collection-questions-02.md) (必看 :+1:)- [Java 容器使用注意事项总结](./docs/java/collection/java-collection-precautions-for-use.md)**源码分析** ：* [ArrayList 源码+扩容机制分析](./docs/java/collection/arraylist-source-code.md)* [HashMap(JDK1.8)源码+底层数据结构分析](./docs/java/collection/hashmap-source-code.md)* [ConcurrentHashMap 源码+底层数据结构分析](./docs/java/collection/concurrent-hash-map-source-code.md) IO* [IO 基础知识总结](./docs/java/io/io-basis.md)* [IO 设计模式总结](./docs/java/io/io-design-patterns.md)* [IO 模型详解](./docs/java/io/io-model.md) 并发**知识点/面试题总结** : (必看 :+1:)- [Java 并发常见知识点&面试题总结（上）](./docs/java/concurrent/java-concurrent-questions-01.md)- [Java 并发常见知识点&面试题总结（中）](./docs/java/concurrent/java-concurrent-questions-02.md)- [Java 并发常见知识点&面试题总结（下）](./docs/java/concurrent/java-concurrent-questions-03.md)**重要知识点详解** ：- [JMM（Java 内存模型）详解](./docs/java/concurrent/jmm.md)- **线程池** ：[Java 线程池详解](./docs/java/concurrent/java-thread-pool-summary.md)、[Java 线程池最佳实践](./docs/java/concurrent/java-thread-pool-best-practices.md)- [ThreadLocal 详解](./docs/java/concurrent/threadlocal.md)- [Java 并发容器总结](./docs/java/concurrent/java-concurrent-collections.md)- [Atomic 原子类总结](./docs/java/concurrent/atomic-classes.md)- [AQS 详解](./docs/java/concurrent/aqs.md)- [CompletableFuture入门](./docs/java/concurrent/completablefuture-intro.md) JVM (必看 :+1:)JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle.com/javase/specs/jvms/se8/html/index.html) 和周志明老师的[《深入理解Java虚拟机（第3版）》](https://book.douban.com/subject/34907497/) （强烈建议阅读多遍！）。- **[Java 内存区域](./docs/java/jvm/memory-area.md)**- **[JVM 垃圾回收](./docs/java/jvm/jvm-garbage-collection.md)**- [类文件结构](./docs/java/jvm/class-file-structure.md)- **[类加载过程](./docs/java/jvm/class-loading-process.md)**- [类加载器](./docs/java/jvm/classloader.md)- [【待完成】最重要的 JVM 参数总结（翻译完善了一半）](./docs/java/jvm/jvm-parameters-intro.md)- [【加餐】大白话带你认识 JVM](./docs/java/jvm/jvm-intro.md)- [JDK 监控和故障处理工具](./docs/java/jvm/jdk-monitoring-and-troubleshooting-tools.md) 新特性- **Java 8** ：[Java 8 新特性总结（翻译）](./docs/java/new-features/java8-tutorial-translate.md)、[Java8常用新特性总结](./docs/java/new-features/java8-common-new-features.md)- [Java 9 新特性概览](./docs/java/new-features/java9.md)- [Java 10 新特性概览](./docs/java/new-features/java10.md)- [Java 11 新特性概览](./docs/java/new-features/java11.md)- [Java 12~13 新特性概览](./docs/java/new-features/java12-13.md)- [Java 14 新特性概览](./docs/java/new-features/java14.md)- [Java 15 新特性概览](./docs/java/new-features/java15.md)- [Java 16 新特性概览](./docs/java/new-features/java16.md)- [Java 17 新特性概览](./docs/java/new-features/java17.md)- [Java 18 新特性概览](./docs/java/new-features/java18.md)- [Java 19 新特性概览](./docs/java/new-features/java19.md) 计算机基础 操作系统- [操作系统常见问题总结！](./docs/cs-basics/operating-system/operating-system-basic-questions-01.md)- [后端程序员必备的 Linux 基础知识总结](./docs/cs-basics/operating-system/linux-intro.md)- [Shell 编程基础知识总结](./docs/cs-basics/operating-system/shell-intro.md) 网络**知识点/面试题总结** ：- [计算机网络常见知识点&面试题总结](./docs/cs-basics/network/other-network-questions.md)- [谢希仁老师的《计算机网络》内容总结（补充）](./docs/cs-basics/network/computer-network-xiexiren-summary.md)**重要知识点详解** ：- [OSI 和 TCP/IP 网络分层模型详解（基础）](./docs/cs-basics/network/osi&tcp-ip-model.md)- [应用层常见协议总结（应用层）](./docs/cs-basics/network/application-layer-protocol.md)- [HTTP vs HTTPS（应用层）](./docs/cs-basics/network/http&https.md)- [HTTP 1.0 vs HTTP 1.1（应用层）](./docs/cs-basics/network/http1.0&http1.1.md)- [HTTP 常见状态码（应用层）](./docs/cs-basics/network/http-status-codes.md)- [TCP 三次握手和四次挥手（传输层）](./docs/cs-basics/network/tcp-connection-and-disconnection.md)- [TCP 传输可靠性保障（传输层）](./docs/cs-basics/network/tcp-reliability-guarantee.md)- [ARP 协议详解(网络层)](./docs/cs-basics/network/arp.md) 数据结构**图解数据结构：**- [线性数据结构 :数组、链表、栈、队列](./docs/cs-basics/data-structure/linear-data-structure.md)- [图](./docs/cs-basics/data-structure/graph.md)- [堆](./docs/cs-basics/data-structure/heap.md)- [树](./docs/cs-basics/data-structure/tree.md) ：重点关注[红黑树](./docs/cs-basics/data-structure/red-black-tree.md)、B-，B+，B*树、LSM树其他常用数据结构 ：- [布隆过滤器](./docs/cs-basics/data-structure/bloom-filter.md) 算法算法这部分内容非常重要，如果你不知道如何学习算法的话，可以看下我写的：* [算法学习书籍+资源推荐](https://www.zhihu.com/question/323359308/answer/1545320858) 。* [如何刷Leetcode?](https://www.zhihu.com/question/31092580/answer/1534887374) **常见算法问题总结** ：* [几道常见的字符串算法题总结 ](./docs/cs-basics/algorithms/string-algorithm-problems.md)* [几道常见的链表算法题总结 ](./docs/cs-basics/algorithms/linkedlist-algorithm-problems.md)* [剑指 offer 部分编程题](./docs/cs-basics/algorithms/the-sword-refers-to-offer.md)* [十大经典排序算法](./docs/cs-basics/algorithms/10-classical-sorting-algorithms.md)另外，[GeeksforGeeks]( https://www.geeksforgeeks.org/fundamentals-of-algorithms/) 这个网站总结了常见的算法 ，比较全面系统。 数据库 基础- [数据库基础知识总结](./docs/database/basis.md)- [NoSQL 基础知识总结](./docs/database/nosql.md)- [字符集详解](./docs/database/character-set.md) MySQL**知识点/面试题总结：**- **[MySQL 常见知识点&面试题总结](./docs/database/mysql/mysql-questions-01.md)** (必看 :+1:)- [MySQL 高性能优化规范建议总结](./docs/database/mysql/mysql-high-performance-optimization-specification-recommendations.md)**重要知识点：**- [MySQL索引详解](./docs/database/mysql/mysql-index.md)- [MySQL事务隔离级别图文详解)](./docs/database/mysql/transaction-isolation-level.md)- [MySQL三大日志(binlog、redo log和undo log)详解](./docs/database/mysql/mysql-logs.md)- [InnoDB 存储引擎对 MVCC 的实现](./docs/database/mysql/innodb-implementation-of-mvcc.md)- [SQL 语句在 MySQL 中的执行过程](./docs/database/mysql/how-sql-executed-in-mysql.md)- [MySQL执行计划分析](./docs/database/mysql/mysql-query-execution-plan.md)- [MySQL 时间类型数据存储建议](./docs/database/mysql/some-thoughts-on-database-storage-time.md)- [MySQL 隐式转换造成索引失效](./docs/database/mysql/index-invalidation-caused-by-implicit-conversion.md) Redis**知识点/面试题总结** : (必看:+1: )：- [Redis 常见知识点&面试题总结(上)](./docs/database/redis/redis-questions-01.md)- [Redis 常见知识点&面试题总结(下)](./docs/database/redis/redis-questions-02.md)**重要知识点：**- [3种常用的缓存读写策略详解](./docs/database/redis/3-commonly-used-cache-read-and-write-strategies.md)- [Redis 5 种基本数据结构详解](./docs/database/redis/redis-data-structures-01.md)- [Redis 3 种特殊数据结构详解](./docs/database/redis/redis-data-structures-02.md)- [Redis 内存碎片详解](./docs/database/redis/redis-memory-fragmentation.md)- [Redis 集群详解](./docs/database/redis/redis-cluster.md) MongoDB- [MongoDB 常见知识点&面试题总结(上)](./docs/database/mongodb/mongodb-questions-01.md)- [MongoDB 常见知识点&面试题总结(下)](./docs/database/mongodb/mongodb-questions-02.md) 搜索引擎用于提高搜索效率，功能和浏览器搜索引擎类似。比较常见的搜索引擎是 Elasticsearch（推荐） 和 Solr。 开发工具 Maven[Maven 核心概念总结](./docs/tools/maven/maven-core-concepts.md) Docker* [Docker 核心概念总结](./docs/tools/docker/docker-intro.md)* [Docker 实战](./docs/tools/docker/docker-in-action.md) Git* [Git 核心概念总结](./docs/tools/git/git-intro.md)* [Github 实用小技巧总结](./docs/tools/git/github-tips.md) 系统设计- [系统设计常见面试题总结](./docs/system-design/system-design-questions.md)- [设计模式常见面试题总结](./docs/system-design/design-pattern.md) 基础- [RestFul API 简明教程](./docs/system-design/basis/RESTfulAPI.md)- [软件工程简明教程简明教程](./docs/system-design/basis/software-engineering.md)- [代码命名指南](./docs/system-design/basis/naming.md) - [代码重构指南](./docs/system-design/basis/refactoring.md)- [单元测试指南](./docs/system-design/basis/unit-test.md) 常用框架 Spring/SpringBoot (必看 :+1:)**知识点/面试题总结** :- [Spring 常见知识点&面试题总结](./docs/system-design/framework/spring/spring-knowledge-and-questions-summary.md)- [SpringBoot 常见知识点&面试题总结](./docs/system-design/framework/spring/springboot-knowledge-and-questions-summary.md)- [Spring/Spring Boot 常用注解总结](./docs/system-design/framework/spring/spring-common-annotations.md)- [SpringBoot 入门指南](https://github.com/Snailclimb/springboot-guide)**重要知识点详解** ：- [Spring 事务详解](./docs/system-design/framework/spring/spring-transaction.md)- [Spring 中的设计模式详解](./docs/system-design/framework/spring/spring-design-patterns-summary.md)- [SpringBoot 自动装配原理详解](./docs/system-design/framework/spring/spring-boot-auto-assembly-principles.md) MyBatis[MyBatis 常见面试题总结](./docs/system-design/framework/mybatis/mybatis-interview.md) 安全 认证授权- [认证授权基础概念详解](./docs/system-design/security/basis-of-authority-certification.md)- [JWT 基础概念详解](./docs/system-design/security/jwt-intro.md)- [JWT 优缺点分析以及常见问题解决方案](./docs/system-design/security/advantages&disadvantages-of-jwt.md)- [SSO 单点登录详解](./docs/system-design/security/sso-intro.md)- [权限系统设计详解](./docs/system-design/security/design-of-authority-system.md) 数据脱敏数据脱敏说的就是我们根据特定的规则对敏感信息数据进行变形，比如我们把手机号、身份证号某些位数使用 * 来代替。 敏感词过滤[敏感词过滤方案总结](./docs/system-design/security/sentive-words-filter.md) 定时任务[Java 定时任务详解](./docs/system-design/schedule-task.md) Web 实时消息推送[Web 实时消息推送详解](./docs/system-design/web-real-time-message-push.md) 分布式 理论&算法&协议- [CAP 理论和 BASE 理论解读](./docs/distributed-system/theorem&algorithm&protocol/cap&base-theorem.md)- [Paxos 算法解读](./docs/distributed-system/theorem&algorithm&protocol/paxos-algorithm.md)- [Raft 算法解读](./docs/distributed-system/theorem&algorithm&protocol/raft-algorithm.md) API 网关[API 网关详解](./docs/distributed-system/api-gateway.md) 分布式 ID[分布式 ID 详解](./docs/distributed-system/distributed-id.md) 分布式锁[分布式锁详解](./docs/distributed-system/distributed-lock.md) 分布式事务[分布式事务详解](./docs/distributed-system/distributed-transaction.md) 分布式配置中心[分布式配置中心详解](./docs/distributed-system/distributed-configuration-center.md) RPC* [RPC 基础常见知识点&面试题总结](./docs/distributed-system/rpc/rpc-intro.md)* [Dubbo 常见知识点&面试题总结](./docs/distributed-system/rpc/dubbo.md) ZooKeeper 前两篇文章可能有内容重合部分，推荐都看一遍。- [ZooKeeper 相关概念总结(入门)](./docs/distributed-system/distributed-process-coordination/zookeeper/zookeeper-intro.md)- [ZooKeeper 相关概念总结(进阶)](./docs/distributed-system/distributed-process-coordination/zookeeper/zookeeper-plus.md)- [ZooKeeper 实战](./docs/distributed-system/distributed-process-coordination/zookeeper/zookeeper-in-action.md) 高性能 数据库读写分离&分库分表[数据库读写分离&分库分表详解](./docs/high-performance/read-and-write-separation-and-library-subtable.md) 负载均衡[负载均衡详解](./docs/high-performance/load-balancing.md) SQL 优化[常见 SQL 优化手段总结](./docs/high-performance/sql-optimization.md) CDN[CDN（内容分发网络）详解](./docs/high-performance/cdn.md) 消息队列消息队列在分布式系统中主要是为了解耦和削峰。相关阅读： [消息队列常见问题总结](./docs/high-performance/message-queue/message-queue.md)。- **RabbitMQ** : [RabbitMQ 基础知识总结](./docs/high-performance/message-queue/rabbitmq-intro.md)、[RabbitMQ 常见面试题](./docs/high-performance/message-queue/rabbitmq-questions.md)- **RocketMQ** : [RocketMQ 基础知识总结](./docs/high-performance/message-queue/rocketmq-intro.md)、[RocketMQ 常见面试题总结](./docs/high-performance/message-queue/rocketmq-questions.md)- **Kafka** ：[Kafka 常见问题总结](./docs/high-performance/message-queue/kafka-questions-01.md) 高可用[高可用系统设计指南](./docs/high-availability/high-availability-system-design.md) 冗余设计[冗余设计详解](./docs/high-availability/redundancy.md) 限流[服务限流详解](./docs/high-availability/limit-request.md) 降级&熔断[降级&熔断详解](./docs/high-availability/fallback&circuit-breaker.md) 超时&重试[超时&重试详解](./docs/high-availability/timeout-and-retry.md) 集群相同的服务部署多份，避免单点故障。 灾备设计和异地多活**灾备** = 容灾+备份。* **备份** ： 将系统所产生的的所有重要数据多备份几份。* **容灾** ： 在异地建立两个完全相同的系统。当某个地方的系统突然挂掉，整个应用系统可以切换到另一个，这样系统就可以正常提供服务了。**异地多活** 描述的是将服务部署在异地并且服务同时对外提供服务。和传统的灾备设计的最主要区别在于“多活”，即所有站点都是同时在对外提供服务的。异地多活是为了应对突发状况比如火灾、地震等自然或者人为灾害。 Star 趋势 公众号如果大家想要实时关注我更新的文章以及分享的干货的话，可以关注我的公众号。