實例一：

DiConfig 文件：

package di;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

//聲明當前類是一個配置類
@Configuration
//自動掃描包下的所有@Service,@Component,@Repository和@Controller註冊為Bean;
@ComponentScan("di")

public class DiConfig {	
	
	
}

DFunctionService 文件：

package di;
import org.springframework.stereotype.Service;

//註入：當前類是spring管理的一個bean
@Service
public class DFunctionService {

	public String SayHello(String word)
	{
		return "Hello, " + word + " !";
	}
	
}

UseFunctionService 文件：

package di;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

//註入：當前類是spring管理的一個bean
@Service
public class UseFunctionService {
	
	//將DFunctionService類的實體Bean註入到UseFunctionService中,讓UseFunctionService擁有DFunctionService的功能
	//等效註解: @Autowire=@Inject=@Resource
	@Autowired
	DFunctionService functionService;
	
	public String SayHello(String word)
	{		
		return functionService.SayHello(word);
	}
	
}

Main 文件：

package di;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class Main {

	public static void main(String args[])
	{
		
		AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(DiConfig.class);
		UseFunctionService userFunctionService = context.getBean(UseFunctionService.class);
		System.out.print(userFunctionService.SayHello("word"));
		context.close();
				
	}
	
}

運行Main.java ,結果為 hello word

spring boot: 一般註入說明(一)