spring boot 初步 IOC 的实现-1

spring boot 借助于其强大的注解功能，帮助我们快速实现。这里简单介绍一下有关IOC的几个注解。

 FunctionService类：（业务类）

package bw.swn.boot.service;
import org.springframework.stereotype.Service;
@Service
public class FunctionService {
	 public String sayHello(String name) {
		 return "Hello "+name+" !";
	 }
}

 UseFunctionService类：（调用类）

package bw.swn.boot.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class UseFunctionService {
	 @Autowired
	 private FunctionService functionService;
	 
	 public void show(String name) {
		  System.out.println(this.functionService.sayHello(name));
	 }
}

IocConfig类（完成装配）

package bw.swn.boot.service;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan("bw.swn.boot.service")
public class IocConfig {
}

  启动类：

package bw.swn.boot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import bw.swn.boot.service.IocConfig;
import bw.swn.boot.service.UseFunctionService;
@SpringBootApplication
public class SpringIocApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringIocApplication.class, args);
		AnnotationConfigApplicationContext ctx=
				new AnnotationConfigApplicationContext(IocConfig.class);
		UseFunctionService use=ctx.getBean(UseFunctionService.class);
		
		use.show("spring boot");
		ctx.close();
	}
}

 输出结果：