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Foreword
recently recorded at Spring Boot learning courses related to the process in the form of notes down, to facilitate future memories, but also to explore here and we explore, article or have tainted supplement, false hope that we can put in time out, I thank you in advance!
Before you start it, I hope to learn with a few questions:
1. What Spring Boot embedded Web containers are?
2, the overall structure of the process or what?
3. What is the core part of?
4, how to achieve?
It is a question of self, I think the problem with to learn, is a better way to learn, contribute to understand. Well, then into the theme.
1, the origin of
today's Internet scene, applications and end-user interaction is most Web applications, especially Java Web application, Java Web container development has also divided its corresponding Servlet Web container and Reactive Web container, the former usage is probably accounted for about 90 percent of its specific implementation has Tomcat, Jetty and Undertow; the latter appeared later, and the system is not fully mature technology stack remains to be time to verify the feasibility of its default implementation as Netty Web Server. Wherein the Servlet container Servlet specification to the three versions of the following relationship:
Undertow the Jetty Servlet specification the Tomcat
4.0 9.X 9.X 2.X
3.1 8.X 8.X 1.X
3.0 7.X 8.XN / A
2.5 6.X 8.XN / A
or more Web containers are Spring Boot wherein embedded in its core features to simplify Spring boot application starts the process. Spring Boot embedded container type is switched by the application dependent Maven, Maven corresponding JAR are:
<!-- Tomcat -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>
<!-- undertow -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-undertow</artifactId>
</dependency>
<!-- jetty -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<-! Netty Web Server ->
<dependency>
<groupId> org.springframework.boot </ groupId>
<artifactId> the Spring-the Boot-Starter-the Reactor-Netty </ artifactId>
</ dependency>
The first three are Servlet Web implementation, the last is Reactive Web implementations. It is noteworthy that, when we reference the Servlet Web function module, it automatically integrates Tomcat, which contains the Tomcat Maven dependencies, that is the default Tomcat Servlet Web container. Maven dependent Servlet Web module: