In depth analysis of spring boot principle - improve your internal skill

osc_00786346 2020-11-10 10:51:58
depth analysis spring boot principle

Invited tutor :MIC
10 years Java EE Employment experience , Worked in Ping An 、 Public comment 、 Dig money and other Internet financial companies ,《Spring Cloud Alibaba Micro service principle and practice 》 author .
Participation in the project : Ping An pay one wallet 、 The project of digging wealth and treasure in Shanghai


A very obvious phenomenon , Except for some old projects , Now? Java Back end projects are basically based on Spring Boot Development , After all, it's easy to use and natural microservices are friendly . No exaggeration ,Spring Boot yes Java One of the most important technologies in the back end , Master it well for Java Programmers matter .

In this article, I will show you Spring Boot Principle , To help you learn more about Spring Boot.

01 What is? spring Boot?

Spring Boot Provides a quick build Spring Dramework Application framework . It is designed to simplify Spring Application initial build and development process . The framework is configured in a specific way , This eliminates the need for developers to define boilerplate configurations .

Spring Boot How to simplify ? Convention over configuration , Reduce configuration by convention , So as to improve the development efficiency .Spring Boot kernel ->(Spring Framework> Convention is better than configuration )

Convention is better than configuration

① default Maven structure , And the default packaging method

② Default profile

③Starer Correlation jar Packet dependency

④Web Default includes Spring-mvc And built in tomcat Containers

⑤ Deploy to tomcat


How not Spring Boot

① introduce jar package

② modify web.xml, Add listening and blocking

③ establish spring mvc Core profile dispatcher-servlet.xml

④ establish controller

⑤ Deploy to tomcat

02 Think deeply or simplify the principles behind


Spring Annotation driven development from XML Configuration era to annotation driven era . The details are as follows :

Spring 1.x Annotation drives the age of enlightenment

Spring 1.x Support Annotation, Although the framework level has already supported @managedResource and @Transactional( Business note ) Etc , But mainly with XML Configuration is subject to .


Spring 1.x What functions are provided ?

Provide Spring Container to host Bean object ——Bean By describing an object ,Spring This configuration will be loaded , And initialize and save .


Spring 2.x Annotation driven transition period

Spring 2.x stay Anonotation New members have been added to the support side ,@Required、 Data related @Repository And AOP dependent @Aspect etc. , But it also improves XML Configuration capability , namely “ Extensible XML To write ”.xml+ How to annotate , Can't break away completely from xml.

defects :bean The maintenance work has become very heavy .

Spring 2.x Provide comments :








for instance :

If you scan the current tag , So it means the current bean Will be loaded .


Spring 3.x Annotations drive the golden age

Spring 3.x It's a milestone era , stay 3.0 In the era, in addition to ascension Spring Pattern annotation “ The derived ” The hierarchy of , And replace the traditional ones with annotations XML The description of form . Replace XML Configuration mode , Introduce configuration class annotation @Configuration.


Spring 3.x Provide comments :



@Import- Import


Spring 4.x Annotation driven era of perfection

Spring 4.x after , Introduce conditional annotations @Conditional. By customizing Condition To achieve coordination , Make up for the previous version of conditional assembly shortcomings ,4.0 Start Profile To pass in turn @Conditional Realization .


Spring 5.x Annotation drives the age of maturity

Spring 5.x As Spring Boot2.0 The bottom of the , Annotation driven performance improvements are not obvious . stay Spring Boot In the application scenario , A lot of use @ComponentScan scanning , Lead to Spring Parsing time-consuming annotations . therefore ,5.0 Introduction of the times @Indexed, by Spring Schema annotations add index .

The meaning of annotation driven is simplification Bean Principle , Describe a need to be Spring IOC Container managed objects .

03 summary

Spring Boot yes Java Technologies that are often used in the back end domain , I hope this article can help you master Spring Boot principle , To be better Javer.


  1. 【计算机网络 12(1),尚学堂马士兵Java视频教程
  2. 【程序猿历程,史上最全的Java面试题集锦在这里
  3. 【程序猿历程(1),Javaweb视频教程百度云
  4. Notes on MySQL 45 lectures (1-7)
  5. [computer network 12 (1), Shang Xuetang Ma soldier java video tutorial
  6. The most complete collection of Java interview questions in history is here
  7. [process of program ape (1), JavaWeb video tutorial, baidu cloud
  8. Notes on MySQL 45 lectures (1-7)
  9. 精进 Spring Boot 03:Spring Boot 的配置文件和配置管理,以及用三种方式读取配置文件
  10. Refined spring boot 03: spring boot configuration files and configuration management, and reading configuration files in three ways
  11. 精进 Spring Boot 03:Spring Boot 的配置文件和配置管理,以及用三种方式读取配置文件
  12. Refined spring boot 03: spring boot configuration files and configuration management, and reading configuration files in three ways
  13. 【递归,Java传智播客笔记
  14. [recursion, Java intelligence podcast notes
  15. [adhere to painting for 386 days] the beginning of spring of 24 solar terms
  16. K8S系列第八篇(Service、EndPoints以及高可用kubeadm部署)
  17. K8s Series Part 8 (service, endpoints and high availability kubeadm deployment)
  18. 【重识 HTML (3),350道Java面试真题分享
  19. 【重识 HTML (2),Java并发编程必会的多线程你竟然还不会
  20. 【重识 HTML (1),二本Java小菜鸟4面字节跳动被秒成渣渣
  21. [re recognize HTML (3) and share 350 real Java interview questions
  22. [re recognize HTML (2). Multithreading is a must for Java Concurrent Programming. How dare you not
  23. [re recognize HTML (1), two Java rookies' 4-sided bytes beat and become slag in seconds
  24. 造轮子系列之RPC 1:如何从零开始开发RPC框架
  25. RPC 1: how to develop RPC framework from scratch
  26. 造轮子系列之RPC 1:如何从零开始开发RPC框架
  27. RPC 1: how to develop RPC framework from scratch
  28. 一次性捋清楚吧,对乱糟糟的,Spring事务扩展机制
  29. 一文彻底弄懂如何选择抽象类还是接口,连续四年百度Java岗必问面试题
  30. Redis常用命令
  31. 一双拖鞋引发的血案,狂神说Java系列笔记
  32. 一、mysql基础安装
  33. 一位程序员的独白:尽管我一生坎坷,Java框架面试基础
  34. Clear it all at once. For the messy, spring transaction extension mechanism
  35. A thorough understanding of how to choose abstract classes or interfaces, baidu Java post must ask interview questions for four consecutive years
  36. Redis common commands
  37. A pair of slippers triggered the murder, crazy God said java series notes
  38. 1、 MySQL basic installation
  39. Monologue of a programmer: despite my ups and downs in my life, Java framework is the foundation of interview
  40. 【大厂面试】三面三问Spring循环依赖,请一定要把这篇看完(建议收藏)
  41. 一线互联网企业中,springboot入门项目
  42. 一篇文带你入门SSM框架Spring开发,帮你快速拿Offer
  43. 【面试资料】Java全集、微服务、大数据、数据结构与算法、机器学习知识最全总结,283页pdf
  44. 【leetcode刷题】24.数组中重复的数字——Java版
  45. 【leetcode刷题】23.对称二叉树——Java版
  46. 【leetcode刷题】22.二叉树的中序遍历——Java版
  47. 【leetcode刷题】21.三数之和——Java版
  48. 【leetcode刷题】20.最长回文子串——Java版
  49. 【leetcode刷题】19.回文链表——Java版
  50. 【leetcode刷题】18.反转链表——Java版
  51. 【leetcode刷题】17.相交链表——Java&python版
  52. 【leetcode刷题】16.环形链表——Java版
  53. 【leetcode刷题】15.汉明距离——Java版
  54. 【leetcode刷题】14.找到所有数组中消失的数字——Java版
  55. 【leetcode刷题】13.比特位计数——Java版
  56. oracle控制用户权限命令
  57. 三年Java开发,继阿里,鲁班二期Java架构师
  58. Oracle必须要启动的服务
  59. 万字长文!深入剖析HashMap,Java基础笔试题大全带答案
  60. 一问Kafka就心慌?我却凭着这份,图灵学院vip课程百度云