SpringBoot创建自定义Starter代码实例

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-autoconfigure</artifactId>
    <version>2.1.4.RELEASE</version>
</dependency>

  DemoService.java

@Data
public class DemoService{

    private String str1;

    private String str2;

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//指定项目在属性文件中配置的前缀为str，即可以在属性文件中通过 str.str1=springboot，就可以改变属性类字段 str1 的值了
@SuppressWarnings("ConfigurationProperties")
@ConfigurationProperties(prefix = "str")
@Data
public class DemoProperties {

    public static final String DEFAULT_STR1 = "SpringBoot ";

    public static final String DEFAULT_STR2 = "Starter";

    private String str1 = DEFAULT_STR1;

    private String str2 = DEFAULT_STR2;
   
   }
 

// 定义 java 配置类
@Configuration
//引入DemoService
@ConditionalOnClass({DemoService.class})
// 将 application.properties 的相关的属性字段与该类一一对应，并生成 Bean
@EnableConfigurationProperties(DemoProperties.class)
public class DemoAutoConfiguration {

    // 注入属性类
    @Autowired
    private DemoProperties demoProperties;

    @Bean
    // 当容器没有这个 Bean 的时候才创建这个 Bean
    @ConditionalOnMissingBean(DemoService.class)
    public DemoService helloworldService() {
        DemoService demoService= new DemoService();
        demoService.setStr1(demoProperties.getStr1());
        demoService.setStr2(demoProperties.getStr2());
        return demoService;
    }

}

org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.demo.springboot.config.DemoAutoConfiguration 

<!--引入自定义Starter-->
<dependency>
    <groupId>com.lhf.springboot</groupId>
    <artifactId>spring-boot-starter-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</dependency>

#配置自定义的属性信息
str.str1=str1
str.str2=str2

@RestController
public class StringController {

      @Autowired
    private DemoService demoService;  //引入自定义Starter中的DemoService 

      @RequestMapping("/")
      public String addString(){
        return demoService.getStr1()+ demoService.getStr2();
    }
}