apply plugin: 'java-library'

apply plugin: 'idea'

// mainClassName 是 application的一个属性，否则会报错

apply plugin: 'application'

mainClassName = 'hello.Application'

sourceCompatibility = 1.8

targetCompatibility = 1.8

repositories {

    mavenCentral()

}

dependencies {

    compile "joda-time:joda-time:2.2"

    compile 'org.springframework:spring-context:5.0.0.RELEASE'

}

// 该项目生成的jar包的名字和版本，如 gs-gradle-0.1.0.jar

jar {

    baseName = 'gs-gradle'

    version =  '0.1.0'

}

package hello;

/**

 * Created by sheting on 10/22/2017

 */

public interface MessageService {

    String getMessage();

}

package hello;

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

import org.springframework.stereotype.Component;

/**

 * Created by sheting on 10/22/2017

 */

@Component

public class MessagePrinter {

    final private MessageService service;

    @Autowired

    public MessagePrinter(MessageService service) {

        this.service = service;

    }

    public void printMessage() {

        System.out.println(this.service.getMessage());

    }

}

package hello;

import org.springframework.context.ApplicationContext;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.context.annotation.Configuration;

/**

 * Created by sheting on 10/22/2017

 */

@Configuration

@ComponentScan

public class Application {

    @Bean

    MessageService mockMessageService() {

        return new MessageService() {

            public String getMessage() {

                return "Hello World!";

            }

        };

    }

    public static void main(String[] args) {

        ApplicationContext context = new AnnotationConfigApplicationContext(Application.class);

        MessagePrinter printer = context.getBean(MessagePrinter.class);

        printer.printMessage();

    }

}