SpringBoot修改为Jetty容器，
SpringBoot使用undertow容器，
SpringBoot使用Jetty容器
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©Copyright 蕃薯耀 2018年3月29日
http://www.cnblogs.com/fanshuyao/
附件&源码下载见：http://fanshuyao.iteye.com/blog/2414809
一、SpringBoot默认的容器为Tomcat，依赖包在spring-boot-starter-web下
- <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
二、SpringBoot把容器修改为Jetty
方法很简单，就是在pom.xml文件中，在引用的spring-boot-starter-web排除Tomcat的依赖包，然后再引入Jetty容器的依赖包，如下：
- <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Jetty适合长连接应用，就是聊天类的长连接 -->
<!-- 使用Jetty，需要在spring-boot-starter-web排除spring-boot-starter-tomcat，因为SpringBoot默认使用tomcat -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jetty</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
三、SpringBoot把容器修改为undertow
- <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- undertow不支持jsp -->
<!-- 使用undertow，需要在spring-boot-starter-web排除spring-boot-starter-tomcat，因为SpringBoot默认使用tomcat -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-undertow</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
四、为什么可以这样切换呢？
因为SpringBoot在org.springframework.boot.autoconfigure.web.EmbeddedServletContainerAutoConfiguration类中已经配置好，根据依赖的Jar包自动切换，代码如下：
- /**
* Nested configuration if Tomcat is being used.
*/
@Configuration
@ConditionalOnClass({ Servlet.class, Tomcat.class })
@ConditionalOnMissingBean(value = EmbeddedServletContainerFactory.class, search = SearchStrategy.CURRENT)
public static class EmbeddedTomcat {
@Bean
public TomcatEmbeddedServletContainerFactory tomcatEmbeddedServletContainerFactory() {
return new TomcatEmbeddedServletContainerFactory();
}
}
/**
* Nested configuration if Jetty is being used.
*/
@Configuration
@ConditionalOnClass({ Servlet.class, Server.class, Loader.class,
WebAppContext.class })
@ConditionalOnMissingBean(value = EmbeddedServletContainerFactory.class, search = SearchStrategy.CURRENT)
public static class EmbeddedJetty {
@Bean
public JettyEmbeddedServletContainerFactory jettyEmbeddedServletContainerFactory() {
return new JettyEmbeddedServletContainerFactory();
}
}
/**
* Nested configuration if Undertow is being used.
*/
@Configuration
@ConditionalOnClass({ Servlet.class, Undertow.class, SslClientAuthMode.class })
@ConditionalOnMissingBean(value = EmbeddedServletContainerFactory.class, search = SearchStrategy.CURRENT)
public static class EmbeddedUndertow {
@Bean
public UndertowEmbeddedServletContainerFactory undertowEmbeddedServletContainerFactory() {
return new UndertowEmbeddedServletContainerFactory();
}
}
方法上注解根据依赖的容器Jar包判断使用哪个容器：
如：
1、tomcat容器
- @ConditionalOnClass({ Servlet.class, Tomcat.class })
表示有使用类Tomcat.class则是tomcat容器
2、Jetty容器
- @ConditionalOnClass({ Servlet.class, Server.class, Loader.class,
WebAppContext.class })
3、undertow容器
- @ConditionalOnClass({ Servlet.class, Undertow.class, SslClientAuthMode.class })
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©Copyright 蕃薯耀 2018年3月29日
http://www.cnblogs.com/fanshuyao/
