SpringBoot-自定义Starter

                                  SpringBoot-自定义Starter

项目参考：https://github.com/xwbGithub/SpringBoot-starter

分析源码：

@Configuration //指定这个类是一个配置类
@ConditionalOnXXX //在指定条件成立的情况下自动配置类生效
@AutoConfigureAfter //指定自动配置类的顺序
@Bean //给容器中添加组件
@ConfigurationPropertie结合相关xxxProperties类来绑定相关的配置
@EnableConfigurationProperties //让xxxProperties生效加入到容器中
自动配置类要能加载
将需要启动就加载的自动配置类，配置在META‐INF/spring.factories
org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
org.springframework.boot.autoconfigure.admin.SpringApplicationAdminJmxAutoConfiguration,\
org.springframework.boot.autoconfigure.aop.AopAutoConfiguration,\

模式：

启动器只用来做依赖导入

专门写一个自动配置模块。

启动器依赖自动配置，别人只需要引入启动器(starter)

Mybatis-spring-boot-starter；自动以启动器名-spring-boot-starter

步骤：

1. 启动器模块

    4.0.0

    com.auguitu
    spring-boot-08-starter-test
    0.0.1-SNAPSHOT
    jar
    
        org.springframework.boot
        spring-boot-starter-parent
        1.5.13.RELEASE
         
    
    
        
        
            com.xwb.starter
            xwb-spring-boot-starter
            1.0-SNAPSHOT
        
    

2、自动配置模块

    4.0.0
    com.xwb.starter
    xwb-spring-boot-starter-autoconfigure
    0.0.1-SNAPSHOT
    jar

    xwb-spring-boot-starter-autoconfigure
    Demo project for Spring Boot

    
        org.springframework.boot
        spring-boot-starter-parent
        1.5.13.RELEASE
         
    
    
        UTF-8        UTF-8
        1.8
    
    
        
        
            org.springframework.boot
            spring-boot-starter
        
    

自定义配置属性

@ConfigurationProperties(prefix = "xwb.hello")
public class HelloProperties {
    private String prefix;
    private String suffix;
    public String getPrefix() {
        return prefix;
    }
    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }
    public String getSuffix() {
        return suffix;
    }
    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }
}

public class HelloService {
    HelloProperties helloProperties;
    public HelloProperties getHelloProperties() {
        return helloProperties;
    }
    public void setHelloProperties(HelloProperties helloProperties) {
        this.helloProperties = helloProperties;
    }
    public String sayHelloXwb(String name) {
        return helloProperties.getPrefix() + "-" + name + "-" + helloProperties.getSuffix();
    }
}

@Configuration
@ConditionalOnWebApplication
@EnableConfigurationProperties(HelloProperties.class)
public class HelloServiceAutoConfiguration {
    @Autowired
    HelloProperties helloProperties;
    @Bean
    public HelloService helloService() {
        HelloService helloService = new HelloService();
        helloService.setHelloProperties(helloProperties);
        return helloService;
    }
}