SpringBoot-自定义Starter精华版

// 自定义Spring Boot Starter的核心组件示例
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
 
// 配置属性类
@ConfigurationProperties(prefix = "sample")
public class SampleProperties {
    private String message;
 
    public String getMessage() {
        return message;
    }
 
    public void setMessage(String message) {
        this.message = message;
    }
}
 
// 配置属性绑定和自动配置的配置类
@Configuration
@EnableConfigurationProperties(SampleProperties.class)
public class SampleConfiguration {
 
    private final SampleProperties properties;
 
    public SampleConfiguration(SampleProperties properties) {
        this.properties = properties;
    }
 
    @Bean
    public WebMvcConfigurer helloController() {
        return new WebMvcConfigurer() {
            @Override
            public void addViewControllers(ViewControllerRegistry registry) {
                registry.addViewController("/hello").setViewName("hello");
            }
        };
    }
 
    @Bean
    public HelloService helloService() {
        return new HelloService(properties.getMessage());
    }
}
 
// 服务类
public class HelloService {
    private String message;
 
    public HelloService(String message) {
        this.message = message;
    }
 
    public String getMessage() {
        return message;
    }
}

这个示例展示了如何创建一个自定义Spring Boot Starter的核心组件。SampleProperties类用于绑定配置文件中的属性。SampleConfiguration类使用@EnableConfigurationProperties注解来启用属性绑定，并且提供了一个WebMvcConfigurer和一个HelloService的Bean，以展示如何添加额外的配置和服务。HelloService类用于处理具体的业务逻辑。这个示例精简了代码，教给开发者如何编写自定义Starter的核心部分。