Spring Boot的依赖配置文件的解析

在pom.xml中

<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.1.RELEASE</version></parent>

spring-boot-starter-parent

是所有springboot启动以来的父类，所有的springboot都必须继承这个

<dependencies><!--web功能的起步依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!--热部署配置--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId></dependency></dependencies>

启用热部署参考 https://www.jianshu.com/p/f658fed35786

热部署作用：热部署，就是在应用正在运行的时候升级软件，却不需要重新启动应用。

<!--web功能的起步依赖--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency>

这一部分中，里面就包含了springmvc的依赖

<dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.0.5.RELEASE</version><scope>compile</scope></dependency>

还有下面的依赖

<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId><version>2.0.1.RELEASE</version><scope>compile</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-json</artifactId><version>2.0.1.RELEASE</version><scope>compile</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-tomcat</artifactId><version>2.0.1.RELEASE</version><scope>compile</scope></dependency><dependency><groupId>org.hibernate.validator</groupId><artifactId>hibernate-validator</artifactId><version>6.0.9.Final</version><scope>compile</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>5.0.5.RELEASE</version><scope>compile</scope></dependency>

里面主要有spring-web、spring-boot-starter-tomcat、spring-boot-starter-json几个比较重要的springweb的依赖，这就是为什么spring boot中自带有tomcat的缘故了，跟本地的tomcat无关。