SpringBoot四大神器之Starter

序

SpringBoot的starter主要用来简化依赖用的。本文主要分两部分，一部分是列出一些starter的依赖，另一部分是教你自己写一个starter。

部分starters的依赖

Starter(Group ID: org.springframework.boot)	传递依赖于
spring-boot-starter-log4j2	■ org.apache.logging.log4j:log4j-slf4j-impl ■ org.apache.logging.log4j:log4j-api ■ org.apache.logging.log4j:log4j-core ■ org.slf4j:jcl-over-slf4j ■ org.slf4j:jul-to-slf4j
spring-boot-starter-logging	■ ch.qos.logback:logback-classic ■ org.slf4j:jcl-over-slf4j ■ org.slf4j:jul-to-slf4j ■ org.slf4j:log4j-over-slf4j
spring-boot-starter-mail	■ org.springframework.boot:spring-boot-starter ■ org.springframework:spring-context ■ org.springframework:spring-context-support ■ com.sun.mail:javax.mail
spring-boot-starter-mobile	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■ org.springframework.mobile:spring-mobile-device
spring-boot-starter-mustache	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■ com.samskivert:jmustache
spring-boot-starter-redis	■ org.springframework.boot:spring-boot-starter ■ org.springframework.data:spring-data-redis ■ redis.clients:jedis
spring-boot-starter-remote-shell	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-actuator ■ org.crashub:crash.cli ■ org.crashub:crash.connectors.ssh (excludes org.codehaus.groovy:groovy-all) ■ org.crashub:crash.connectors.telnet (excludes javax.servlet:servlet-api, log4j :log4j, commons-logging:commons-logging) ■ org.crashub:crash.embed.spring(excludes org.springframework:spring-web, org.codehaus.groovy:groovy-all) ■ org.crashub:crash.plugins.cron (excludes org.codehaus.groovy:groovy-all) ■ org.crashub:crash.plugins.mail (excludes org.codehaus.groovy:groovy-all) ■ org.crashub:crash.shell (excludes org.codehaus.groovy:groovy-all) ■ org.codehaus.groovy:groovy
spring-boot-starter-security	■ org.springframework.boot:spring-boot-starter ■ org.springframework:spring-aop ■org.springframework.security:spring-security-config ■org.springframework.security:spring-security-web
spring-boot-starter-social-facebook	■org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■org.springframework.social:spring-social-config ■ org.springframework.social:spring-social-core ■ org.springframework.social:spring-social-web ■org.springframework.social:spring-social-facebook
spring-boot-starter-social-linkedin	■org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■org.springframework.social:spring-social-config ■ org.springframework.social:spring-social-core ■ org.springframework.social:spring-social-web ■org.springframework.social:spring-social-linkedin
spring-boot-starter-social-twitter	■org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■ org.springframework.social:spring-social-config ■ org.springframework.social:spring-social-core ■org.springframework.social:spring-social-web ■ org.springframework.social:spring-social-twitter
spring-boot-starter-test	■ junit:junit ■ org.mockito:mockito-core ■ org.hamcrest:hamcrest-core ■ org.hamcrest:hamcrest-library ■ org.springframework:spring-core(excludes commons-logging:commons-logging) ■ org.springframework:spring-test
spring-boot-starter-thymeleaf	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■ org.thymeleaf:thymeleaf-spring4 ■nz.net.ultraq.thymeleaf:thymeleaf-layout-dialect
spring-boot-starter-tomcat	■ org.apache.tomcat.embed:tomcat-embed-core ■ org.apache.tomcat.embed:tomcat-embed-el ■org.apache.tomcat.embed:tomcat-embed-logging-juli ■org.apache.tomcat.embed:tomcat-embed-websocket
spring-boot-starter-undertow	■ io.undertow:undertow-core ■ io.undertow:undertow-servlet(excludes org.jboss.spec.javax.servlet:jboss-servlet-api_3.1_spec) ■ io.undertow:undertow-websockets-jsr ■ javax.servlet:javax.servlet-api ■ org.glassfish:javax.el
spring-boot-starter-validation	■ org.springframework.boot:spring-boot-starter ■ org.apache.tomcat.embed:tomcat-embed-el ■org.hibernate:hibernate-validator
spring-boot-starter-velocity	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■ commons-beanutils:commons-beanutils ■ commons-collections:commons-collections ■ commons-digester:commons-digester ■ org.apache.velocity:velocity ■ org.apache.velocity:velocity-tools ■ org.springframework:spring-context-support
spring-boot-starter-web	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-tomcat ■ org.springframework.boot:spring-boot-starter-validation ■com.fasterxml.jackson.core:jackson-databind ■ org.springframework:spring-web ■ org.springframework:spring-webmvc
spring-boot-starter-websocket	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■ org.springframework:spring-messaging ■org.springframework:spring-websocket
spring-boot-starter-ws	■ org.springframework.boot:spring-boot-starter ■ org.springframework.boot:spring-boot-starter-web ■org.springframework:spring-jms ■ org.springframework:spring-oxm ■ org.springframework.ws:spring-ws-core ■ org.springframework.ws:spring-ws-support

Reference

来自<<Spring Boot in Action>>的附录B SpringBoot Starters的内容

如何自己写starter

主要步骤

• 1、选择已有的starters，在此基础上进行扩展.

• 2、创建自动配置文件并设定META-INF/spring.factories里的内容.

• 3、发布你的starter

添加依赖管理

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring.boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
</dependencyManagement>

添加starter自己的依赖

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
</dependencies>

新建configuration

@Configuration
@ComponentScan( basePackages = {"com.patterncat.actuator"} )
public class WebAutoConfiguration {

    /**
     * addViewController方法不支持placeholder的解析
     * 故在这里用变量解析出来
     */
    @Value("${actuator.web.base:}")
    String actuatorBase;

//    @Bean
//    public ActuatorNavController actuatorNavController(){
//        return new ActuatorNavController();
//    }

    @Bean
    public WebMvcConfigurerAdapter configStaticMapping() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addViewControllers(ViewControllerRegistry registry) {
                //配置跳转
                registry.addViewController(actuatorBase+"/nav").setViewName(
                        "forward:/static/nav.html");
            }

            @Override
            public void addResourceHandlers(ResourceHandlerRegistry registry) {
                registry.addResourceHandler("/static/**").
                        addResourceLocations("classpath:/static/");
            }
        };
    }

}

修改/META-INF/spring.factories

# AutoConfigurations
org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.patterncat.actuator.configuration.WebAutoConfiguration

发布

mvn clean install

引用

        <dependency>
            <groupId>com.patterncat</groupId>
            <artifactId>spring-boot-starter-actuator-web</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

启动访问

mvn spring-boot:run

访问

http://localhost:8080/nav

note

• github工程源码

• Spring Boot：定制自己的starter

• Boot your own infrastructure – Extending Spring Boot in five steps