注解配置

java config的demo

项目结构

Main

public class Main {

    public static void main(String[] args) {
        AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(AnnotationConfig.class); //1
        UseFunctionService useFunctionService = applicationContext.getBean(UseFunctionService.class); //2
        System.out.println(useFunctionService.SayHello("World"));
        applicationContext.close();
    }

}

AnnotationConfig

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

@Configuration
@ComponentScan("com.supremepole.springconfigbeanannotation")
public class AnnotationConfig {
}

FunctionService

import org.springframework.stereotype.Service;

@Service
public class FunctionService {

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

}

UseFunctionService

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

@Service
public class UseFunctionService {

    @Autowired
    FunctionService functionService;

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

}