import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;

import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;

import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;

import org.springframework.boot.context.properties.EnableConfigurationProperties;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

@Configuration

@ConditionalOnWebApplication//web应用才生效

@EnableConfigurationProperties(HelloProperties.class)

@ConditionalOnClass(HelloService.class)

public class HelloServiceAutoConfiguration {

    @Autowired

    HelloProperties helloProperties;

    @Bean

    public HelloService helloService(){

        HelloService service = new HelloService();

        service.setHelloProperties(helloProperties);

        return service;

    }

}