5、通过在classpath自动扫描方式把组件纳入spring容器中管理例子

1.此处要注入一股Functions类,采用扫描注入的组件的方式须该类有一个接口,先写出Functions接口FunctionsInterface.java

package scan.impl;

public interface FunctionsInterface {

    public abstract void show();

}

2.Functions.java实现接口

package scan.impl;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

import org.springframework.stereotype.Service;

@Service("functions")
public class Functions implements FunctionsInterface {
    /* (non-Javadoc)
     * @see scan.impl.FunctionsInterface#show()
     */
    @Override
    public void show() {
        System.out.println("我是扫描装配的!");
    }
    
    @PostConstruct
    public void init() {
        System.out.println("我是初始化方法!");
    }
    
    @PreDestroy
    public void destroy() {
        System.out.println("我是销毁方法!");
    }
}

3.测试类FunctionTest.java

package scan.impl;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

import org.springframework.stereotype.Service;

@Service("functions")
public class Functions implements FunctionsInterface {
    /* (non-Javadoc)
     * @see scan.impl.FunctionsInterface#show()
     */
    @Override
    public void show() {
        System.out.println("我是扫描装配的!");
    }
    
    @PostConstruct
    public void init() {
        System.out.println("我是初始化方法!");
    }
    
    @PreDestroy
    public void destroy() {
        System.out.println("我是销毁方法!");
    }
}

4.运行结果:

我是初始化方法!

Finished creating instance of bean 'functions'

Returning cached instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'

Returning cached instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'

Returning cached instance of singleton bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'

Returning cached instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'

Returning cached instance of singleton bean 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor'

Unable to locate LifecycleProcessor with name 'lifecycleProcessor': using default [org.springframework.context.support.DefaultLifecycleProcessor@469a9b65]

Returning cached instance of singleton bean 'lifecycleProcessor'

Publishing event in org.springframework.context.support.ClassPathXmlApplicationContext@5e7808b9: org.springframework.context.event.ContextRefreshedEvent[source=org.springframework.context.support.ClassPathXmlApplicationContext@5e7808b9: startup date [Sun Dec 15 14:14:17 CST 2013]; root of context hierarchy]

getProperty("spring.liveBeansView.mbeanDomain", String)

Searching for key 'spring.liveBeansView.mbeanDomain' in [systemProperties]

Searching for key 'spring.liveBeansView.mbeanDomain' in [systemEnvironment]

PropertySource [systemEnvironment] does not contain 'spring.liveBeansView.mbeanDomain'

PropertySource [systemEnvironment] does not contain 'spring_liveBeansView_mbeanDomain'

PropertySource [systemEnvironment] does not contain 'SPRING.LIVEBEANSVIEW.MBEANDOMAIN'

PropertySource [systemEnvironment] does not contain 'SPRING_LIVEBEANSVIEW_MBEANDOMAIN'

Could not find key 'spring.liveBeansView.mbeanDomain' in any property source. Returning [null]

Returning cached instance of singleton bean 'functions'

我是扫描装配的!

Closing org.springframework.context.support.ClassPathXmlApplicationContext@5e7808b9: startup date [Sun Dec 15 14:14:17 CST 2013]; root of context hierarchy

Publishing event in org.springframework.context.support.ClassPathXmlApplicationContext@5e7808b9: org.springframework.context.event.ContextClosedEvent[source=org.springframework.context.support.ClassPathXmlApplicationContext@5e7808b9: startup date [Sun Dec 15 14:14:17 CST 2013]; root of context hierarchy]

Returning cached instance of singleton bean 'lifecycleProcessor'

Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@585976c2: defining beans [functions,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy

Invoking destroy method on bean 'functions': public void scan.impl.Functions.destroy()

我是销毁方法!

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