01.引入依賴

<!--自定義starter的核心依賴-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-autoconfigure</artifactId>
    <version>2.7.2</version>
</dependency>

02.創(chuàng)建標記(只有引用此starter的應用中掃描到標記類才開啟自動配置)

public class WorkflowConfigMarker {
}

03.配置開關(添加配置開關注解,才會掃描到標記類才會開啟自動配置)

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Import(WorkflowConfigMarker.class)
public @interface EnableWorkflowRegisterServer {
}

04.配置容器(只有掃描到標記類時配置容器才會生效 ,才會注入bean)

@Configuration
@ConditionalOnBean(WorkflowConfigMarker.class)
public class WorkflowAutoConfiguration {

    static {
        System.out.println("WorkflowAutoConfiguration init ...");
    }

    @Bean
    public WorkflowProperties simpleBean(){
        return new WorkflowProperties();
    }
}

05.配置參數(shù)(配置參數(shù)可以在引用此starter項目的配置文件中配置)

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties(prefix = "workflow")
public class WorkflowProperties {
    
    private String configurationParameter1;

    private String configurationParameter2;

    public String getConfigurationParameter1() {
        return configurationParameter1;
    }

    public void setConfigurationParameter1(String configurationParameter1) {
        this.configurationParameter1 = configurationParameter1;
    }

    public String getConfigurationParameter2() {
        return configurationParameter2;
    }

    public void setConfigurationParameter2(String configurationParameter2) {
        this.configurationParameter2 = configurationParameter2;
    }
}

06.創(chuàng)建文件(創(chuàng)建 ：/ resource/ META-INF/ spring.factories 文件)

org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.lagou.configuration.WorkflowAutoConfiguration