Widely loved in Alibaba, this "Java Assault Collection" is worth learning for all Java programmers

4. Design patterns (23 design patterns)

5. SQL basics and optimization

6.HTTP/TCP protocol

7. Algorithms and Data Structures

• Java algorithm (binary search + sorting algorithm + backtracking algorithm, etc.)

• Consensus algorithm (Paxos+Zab+Raft+NWR+Gossip+consistency Hash)

• Data structure (stack + queue + linked list + hash table + sorted binary tree + red-black tree + B tree + bitmap)

8.Redis

1-3 years: qualified programmer

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1. JVM basic tuning

2. Common framework source code (Spring+SpringMVC+Mybatis)

3. Message middleware (MQ+Kafka)

![](https://imgconvert.csdnimg.cn/aHR0cHM6Ly9zdGF0aWMwMDE

"Analysis of Java interview questions in first-line manufacturers + back-end development study notes + latest architecture explanation video + actual project source code handouts"

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4. Microservices

5.Netty

4-5 years: Improve the breadth and depth of technology

==========================================================================

1. Performance tuning

2. Microservices

3. Distributed scene problems