//注解配置：
@Service
@Component
@Repository
@Controlle

//JAVA配置
@Confirguration 相当于spring的配置文件XML
@Bean 用到方法上，表示当前方法的返回值是一个bean

package di;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
//注解配置
@Service 
public class UseFunctionService {
  @Autowired
  FunctionService functionService;

  public String sayHello(String word) {
    return functionService.toHello(word);
  }
}

package javaconfig;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class JavaConfig {
  //通过这种方式，获得spring的依赖注入
  @Bean
  public UseFunctionService useFunctionService () {
    return new UseFunctionService ();
  }
}