srpingboot 自定义 start

自动配置工程

1. 绑定配置文件，上逼格的 start 都支持自定义配置，我们也装像点~~

   @ConfigurationProperties("cyrus.hello") 
   public class CyrusHelloProperties {// 绑定配置文件 cyrus.hello.username 属性private String username;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}
   }
   

2. start 核心业务功能

   // 这里没有 @Configuration，因为要自动配置
   public class HelloService {@Autowiredprivate CyrusHelloProperties cyrusHelloProperties;public String sayHello(String username){return cyrusHelloProperties.getUsername() + "你好";}}
   

3. start 自动配置

   @Configuration
   @EnableConfigurationProperties(CyrusHelloProperties.class)
   public class CyrusHelloAutoConfiguration {@ConditionalOnMissingBean(HelloService.class)@Beanpublic HelloService helloService(){return new HelloService();}
   }
   

start 工程

1. resource/META-INF 下创建 spring.factories 文件，文件内容如下

   # Auto Configure
   org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
   com.cyrus.hello.autoconfigure.CyrusHelloAutoConfiguration
   

2. pom 引入自动配置工程，引入 start 自动引入其所需依赖

   <dependencies><dependency><groupId>curus-hello</groupId><artifactId>cyrus-hello-spring-boot-autoconfigure</artifactId><version>0.0.1-SNAPSHOT</version></dependency>
   </dependencies>
   

工程结构