springboot自动配置、自定义starter/@Enabl

自定义starter

• 自定义命名规则
  SpringBoot提供的starter以spring-boot-starter-xxx的方式命名的。官方建议自定义的starter使用xxx-spring-boot-starter命名规则。以区分SpringBoot生态提供的starter。
• pom

  <dependencies>
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-configuration-processor</artifactId>
          <optional>true</optional>
      </dependency>
      <dependency>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-starter</artifactId>
      </dependency>
  </dependencies>
  

• 实体类映射配置信息

  @ConfigurationProperties(prefix = "demo")
  public class DemoProperties {
      private String mes;
      //Constructor
      //getter setter
  }
  

• 定义一个Service

  //随便定义一个Service
  public class DemoService {
      private String mes;
      //Constructor
      //getter setter
  }
  

• 配置类

  @Configuration
  @EnableConfigurationProperties(DemoProperties.class)//ioc注入
  public class DemoConfig {
      @Autowired
      private DemoProperties demoProperties;
  
      @Bean(name = "demo")
      public DemoService demoService(){
          return new DemoService(demoProperties.getMes());
      }
  }
  

• src/main/resources/META-INF/spring.factories

  org.springframework.boot.autoconfigure.EnableAutoConfiguration=cn.lilq.cloudregistry.config.DemoConfig
  

• test
  mvn clean install
  • pom

    <dependency>
        <groupId>cn.lilq</groupId>
        <artifactId>test-spring-boot-starter</artifactId>
        <version>0.1</version>
    </dependency>
    

  • application.properties

    demo.mes=hello
    

  • 测试类

    @Resource(name = "demo")
    private DemoService demoService;
    public String test(){
        return demoService.say();
    }
    

带@EnableXXX开关的自动配置

pom、实体类映射配置信息、Service、配置类不需要更改，且不需要spring.factories

• EnableMyTest

  @Target(ElementType.TYPE)
  @Retention(RetentionPolicy.RUNTIME)
  @Documented
  @Inherited
  @Import(DemoConfig.class)
  @interface EnableMyTest {
  }