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 :

one :JVM

( 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. )

three :Spring

( core :spring IOC,spring AOP principle ,spring 5,springMVC, transaction management , Cyclic dependence ,spring Design mode, etc )

four :MyBatis

( core : paging , Paging plug-in , Batch insert ,select,insert,updae|delete etc. )

five :SpringBoot

( core : Core annotation , Operation mode , Starters, monitor ,Starters, Loading order , Hot deployment , Core profile ,ActiveMQ)

six :MySQL

( core :SQL Execution principle , Indexing underlying mechanism ,SQL Execution plan analysis ,Mysql Lock mechanism ,Mysql Transaction isolation ,SQL Optimization practice, etc )

seven :Dubbo

( contain :Dubbo Basics , architecture design , colony , to configure , communication protocol ,SPI etc. )

eight :Nginx

( core :HTTP request , characteristic ,Apache,Master and Worker process , Forward proxy and reverse proxy , Lockless concurrency framework Disruptor etc. )

nine :MQ

( 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 )

ten :Zookeeper

( core :ZooKeeper Election mechanism ,ZooKeeper data model ,ZooKeeper Application scenario )

eleven :Redis

( 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 ...)

fourteen :ElasticSearch

( core :ElasticSearch data model ,ElasticSearch Distributed architecture ,ElasticSearch Data reading and writing principle and segment merging, etc )

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