springboot自定义starter

1. 新建springboot项目

注意：spring 官方提供 starter 通常命名为 spring-boot-starter-{name}， 我们自定义的starter一般命名为 {name}-spring-boot-starter

2. 删除启动类

3.修改pom文件

       

        
            org.springframework.boot
            spring-boot-configuration-processor
            true
        
        
            org.springframework.boot
            spring-boot-autoconfigure
        
        
            org.projectlombok
            lombok
            true
        


    
        
        
            
                org.apache.maven.plugins
                maven-compiler-plugin
            
        
    

4. 定义属性配置类

@Data
@ConfigurationProperties("test.example")
public class TestProperties {

    private String host;

    private int port;
}

5. 定义业务类

@Slf4j
public class TestService {

    private String host;

    private int port;

    public TestService(TestProperties test){
        this.host = test.getHost();
        this.port = test.getPort();
    }

    public void print(){
        log.info(this.host + ":" +this.port);
    }
}

6. 定义配置类

@Configuration
@ConditionalOnClass(TestService.class)
@EnableConfigurationProperties(TestProperties.class)
@ConditionalOnProperty(prefix = "test.example",value = "enabled", havingValue = "true")
@Slf4j
public class TestAutoConfigure {

    @Autowired
    private TestProperties testProperties;

    @Bean
    @ConditionalOnMissingBean(TestProperties.class)
    TestService testService(){
        return new TestService(testProperties);
    }
}

7. 在resources目录下新建meta-INF 目录，在下面新建 spring.factories 文件，文件中申明配置类

org.springframework.boot.autoconfigure.EnableAutoConfiguration=
  com.baviya.testspringbootstarter.config.TestAutoConfigure

8.使用mvn clean install 打包

9. 项目中添加依赖

        
            com.test
            test-spring-boot-starter
            1.0.0-SNAPSHOT
        

10. 在application文件中，定义属性，和上面的 属性配置类 TestProperties 关联

test:
  example:
    enabled: true
    host: 127.0.0.1
    port: 8080

12.在业务中使用

@RestController
@RequestMapping
@Slf4j
public class TestController {

    @Autowired
    private TestService testService;

    @RequestMapping
    public String test(HttpServletRequest request){
        testService.print();
    }
}

1. 遇到的问题：Unable to read meta-data for class  XXXXX

是因为没有删除启动类导致，删除重新打包即可

2. 删除启动类打包失败

修改pom文件中build模块

 
        
        
            
                org.apache.maven.plugins
                maven-compiler-plugin