"Spring Boot source code interpretation and principle analysis"

Improve Spring Boot's preferred reading

Spring Boot 1.0.0 was released as early as 2014, but it is only now that "cost reduction and efficiency increase" is advocated, Spring Boot has attracted the attention of more and more enterprises.

For this 8-year-old technology, the author LinkedBear can be regarded as a hardcore researcher of Spring Boot.

He is a senior Java senior engineer who focuses on researching and sharing underlying technologies. He has successively served as backbone development and technical director in many companies and worked as a back-end engineer in Inspur Group.

In fact, he started his intensive research on Spring Boot many years ago. After years of painstaking research, he has formed unique insights into frameworks such as Spring and Spring Boot, and has rich practical experience in framework systems and architecture encapsulation.

Therefore, it is only natural that he should compile this book.

In 2019, LinkedBear entered the Nuggets community in a low-key manner and began to "crazily output" the content of the brochure. In just three years, he has published 5 booklets in the community, which can be regarded as a veritable prolific writer. Among them, 4 booklets are related to Spring technology. "Spring Boot Source Code Interpretation and Principle Analysis" is the top 1 book in terms of Spring Boot sales.

In practice, LinkedBear deeply felt that although the number of Spring Boot users is increasing day by day, there are not many people who know the principles behind it, and even fewer people can go deep into the source code and explore the bottom layer of the source code.

In fact, Spring Boot itself has a powerful and ingenious design, and it contains design ideas that many developers and users are eager to learn. By studying the source code and underlying design of Spring Boot and Spring Framework, it is believed that developers' abilities can be improved to a higher level.

He also observed that there are three main obstacles for developers not to learn deeply.

The cost of reading source code is high: it is difficult, time-consuming and labor-intensive, and the input-output ratio is too low.
High research threshold: The bottom layer of the framework source code is too complicated.
Unsystematic learning: Most of the information on the Internet is disorganized, and it is difficult to sort out ideas by yourself.

Based on the pain points of developers and the feedback from readers of the Nuggets Booklet, LinkedBear spent two and a half years summarizing the research and understanding of Spring Boot and Spring Framework, and finally formed this book.

"Booklet" becomes "big book", fully understand Spring Boot

When designing the content, he tried his best to systematically organize the core principles in the framework to reduce the difficulty of reading and understanding, hoping to take into account the developers who have already begun to explore and are preparing to learn the principles of Spring Boot.

I believe that after reading this book, you can understand the principles from the bottom, and then re-acquaint yourself with the familiar Spring in front of you.

Although the author has taken care of various reader groups as much as possible, Xiaoyi still wants to remind you: this book is not an introductory book to Spring Boot!

Readers need to know at least Spring Boot and Spring Framework, and have basic experience in using them. If you have a certain grasp of Java SE, Java EE and other related basic knowledge, it would be even better.

LinkedBear believes that the following types of readers are most suitable for owning this book:

Technical researcher: able to use Spring Boot proficiently, but has not delved into deep-level features and high-level use; researchers who intend to deeply explore the Spring ecology Skill
upgrader: have actual project development experience, but are not satisfied with the shallow level Current status of use; want to be promoted to senior technical positions such as technical directors and architects; job seekers who are troubled by Spring Boot and Spring Framework problems
Enthusiasts: the technical breadth is sufficient, but the depth is limited, and interest groups who want to continue to study this technology

This book will analyze several core modules (IOC, AOP, transaction, Web, embedded container, etc.) of Spring Framework and Spring Boot, striving to achieve sufficient depth and the lowest possible difficulty of understanding.

Readers should not be afraid of difficulties, please rest assured - this book will be developed step by step, and will not "skip too many levels", and readers with basic knowledge can understand it.

Since this book is an upgrade based on the booklet, the content of the book is more systematic, and in-depth combined with the feedback from readers of the booklet, targeted optimization is given, and the explanation is more in-depth and detailed. Not just an upgrade, but a refresh!

Different from the centralized knowledge explanation in the booklet, Linked-Bear replans the content into the following four parts, explaining the knowledge from the shallower to the deeper.

Part 1: The core container that Spring Boot relies on at the bottom layer
mainly introduces the underlying basic knowledge, aiming to help the author lay a solid foundation. First review Spring Boot knowledge from the overall level, allowing readers to quickly review the underlying logic and core knowledge of Spring Boot. This knowledge is the basis for subsequent programming and applications.

Part 2: Analysis of the life cycle principle of Spring Boot Taking
the Event events issued in each period of the life cycle as the main line, combined with the memorabilia completed in each life cycle, it will give you an overview of Spring Boot and a deeper understanding of Spring Boot.

Part 3: Spring Boot integrates common development scenarios
Corresponding to the configuration of the core container in the first two parts, it explains the module configuration and demonstrates the module application in different scenarios. This part of the content is very close to actual combat, and these technologies can be used in scenarios such as e-commerce, gateway services, and databases.

Part 4: Spring Boot application running
Spring Boot has a variety of packaging methods. The author chooses two methods to explain the boot process of the application respectively, and introduces the elegant shutdown feature introduced by the new version. After learning this chapter, your Spring Boot will be able to run through completely! He focuses on the research of distributed systems and machine learning algorithms, and has published papers in top academic conferences in the fields of theory, machine learning, applications, and operating systems.

All-round supporting resources, learn to come to me!

Spring Boot and Spring Framework have a wide range of applications at present, and the version iterations are relatively frequent, so there may be discrepancies between the content in the book and the practice.

Therefore, the author continues the consistent style, will continue to listen to feedback, and make corrections as soon as possible. Relevant updates will be published on the WeChat public account "Old Bear Says Spring" and his GitHub blog. Readers can pay attention to get the latest information in time, and learn more about Spring Boot's cutting-edge knowledge through these channels.

All the test codes and courseware attached to this book have also been hosted on the GitHub platform. Readers are welcome to download and refer.

GitHub warehouse address:
(https://github.com/LinkedBear/spring-boot-source-analysis-epubit）

Finally, Xiaoyi also listed a list of knowledge for readers. After reading this book, you can check the corresponding items to check whether you have learned all the relevant knowledge:

SpringBoot application startup and boot process
SpringFramework manual assembly and SpringBoot automatic assembly
IOC startup principle and internal mechanism
AOP proxy and execution
principle Declarative transaction control principle, transaction propagation behavior principle
SpringWebMvc, SpringWebFlux basic principles
Embedded Web container The principle
of the ability to read the source code

New technology track, leading the way in 2023

In fact, Spring Boot is quite popular in the current Java back-end development.

It allows developers not to switch their thinking between configuration and logic business, and devote themselves to the code writing of logic business, which greatly improves development efficiency and shortens the project cycle.

With the understanding of the principles, more and more learners have begun to feel that Spring Boot is "really fragrant"!

I believe that in 2023, more people will use it to make great achievements in the workplace. If you want to overtake on a curve, why don't you place an order and learn it now?
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