Recently, many peer groups have spoken one after another “ Impending unemployment ” , Others have lost their jobs , Currently unemployed . However, many students left messages and posted that the big factory passed the interview , Starting salary 30k, Some are unemployed and others are employed .
Now the industry trend is really not very good , Due to the impact of the epidemic and layoffs, a large number of programmers are about to lose their jobs . In this market environment, those who originally wanted to change jobs chose to wait and see for the time being , This also lost a lot of opportunities for a raise .
But some are unemployed and others are employed , The core track of Dachang has not been recruiting all the time , The key is how to enter the core track —— Enhance self core values , Have irreplaceable ability !!
Share a set of Ali P8 Organized by the boss 2022Java Advanced learning route + Collection of high frequency interview questions ,
I hope everyone can improve their core competitiveness , Become the irreplaceable one , In this wave of layoffs in a standing position .
Content coverage ：
Java Basics ,JVM, Multithreading & Concurrent articles ,Spring,MyBatis,SpringBoot,MySQL,SpringCloud,Dubbo,Nginx,MQ,Linux,Zookeeper,Redis, Distributed , Design mode ,maven,ElasticSearch,tomcat,Git
Equal technology stack , total 2000 page , Now it's free for everyone .
I suggest you save it , If you finish it seriously , It is very helpful for sprint to big factories and promotion and salary increase !
Some documents are shown below ：
（ core ：JVM Class loading mechanism ,JVM Memory model , Garbage collection mechanism , Implementation mechanism of class bytecode ,JVM Tuning case ,GC Detailed log explanation, etc ）
two ： Multithreading & Concurrent articles
（ core ： Concurrent set , Thread pool , Blocking queue ,CAS Atomic operation , Lockless concurrency framework Disruptor etc. ）
（ core ：spring IOC,spring AOP principle ,spring 5,springMVC, transaction management , Cyclic dependence ,spring Design mode, etc ）
（ core ： paging , Paging plug-in , Batch insert ,select,insert,updae|delete etc. ）
（ core ： Core annotation , Operation mode , Starters, monitor ,Starters, Loading order , Hot deployment , Core profile ,ActiveMQ）
（ core ：SQL Execution principle , Indexing underlying mechanism ,SQL Execution plan analysis ,Mysql Lock mechanism ,Mysql Transaction isolation ,SQL Optimization practice, etc ）
（ contain ：Dubbo Basics , architecture design , colony , to configure , communication protocol ,SPI etc. ）
（ core ：HTTP request , characteristic ,Apache,Master and Worker process , Forward proxy and reverse proxy , Lockless concurrency framework Disruptor etc. ）
（ core ： Message loss , Message repeated consumption , Message out of order , Message backlog , Delay queue , Message backtracking consumption , Message disk brushing mechanism ,MQ Middleware cluster architecture principle, etc ）
（ core ：ZooKeeper Election mechanism ,ZooKeeper data model ,ZooKeeper Application scenario ）
（ core ：Memcache, Single thread model efficiency , Thread model , pipeline,HashMap , Persistence mode ,bigkey, Cluster mode ）
twelve ： Distributed
（ core ： Principle of distributed architecture , Cluster architecture principle , Distributed lock , Distributed transaction , Distributed protocol , Distributed configuration , Massive data sub database and sub table , Distributed scheduling, etc ）
thirteen ： Design mode
（ core ： Singleton mode , Factory mode , Abstract factory pattern , Builder pattern , Prototype mode , Adapter mode , Decorator mode , Agent mode, etc 23 Design patterns ...）
（ core ：ElasticSearch data model ,ElasticSearch Distributed architecture ,ElasticSearch Data reading and writing principle and segment merging, etc ）