Spring Annotation (annotation) @Scope, @PostConstruct and @predestroy

1. @Scope:

@Scope ("prototype") or @scope ("singleton")

is equivalent to the applicationcontext.xml inside the Bean's property scope

<bean id= "StuDao1" class= " Com.mth.impl.StuDaoImpl" scope= "Singleton" ></bean>

2. @PostConstruct = Init-method; @PreDestroy = Destroy-method;

is equivalent to the applicationcontext.xml inside the Bean's properties

<bean id= "StuDao1" class= "Com.mth.impl.StuDaoImpl" "init-method=" "></bean>

Studaoimpl Code:

Package Com.mth.impl;

Import Org.springframework.context.annotation.Scope;
Import org.springframework.stereotype.Component;

Import com.mth.bean.Student;
Import Com.mth.dao.IStuDao;

/**
 * * 
 @ClassName: Studaoimpl
 * @Description: @Component ("Studao") a name called Studao
 * @author mth 75100313@qq.com
 * @date 2014-1-19 PM 10:13:23
 * * */
//bean properties inside the annotation representation of the scope, parameter is singleton (one) or prototype (create a new one each time)
@Scope ("prototype")
@Component ("Studao") Public
class Studaoimpl implements Istudao {

	@Override public
	void Savestu (Student stu) {
		System.out.println (save student);

	}

Service Code:

Package com.mth.service;

Import javax.annotation.PostConstruct;
Import Javax.annotation.PreDestroy;
Import Javax.annotation.Resource;

Import org.springframework.stereotype.Component;

Import com.mth.bean.Student;
Import Com.mth.dao.IStuDao;

@Component ("Stuser") public
class Service {
	private Istudao dao;

	The method executed before service initialization is equivalent to the Init-method property in the configuration file
	@PostConstruct public
	void init () {
		System.out.println ( "Init");
	}

	Public Istudao Getdao () {return
		dao;
	}

	Specifies that the resource currently required to be injected matches the value in the component
	@Resource (name = "Studao") public
	void Setdao (Istudao dao) {
		This.dao = DAO;
	}

	public void Savestu (Student Student) {
		dao.savestu (Student);
	}

	Equivalent to the Destroy-method property configured in the Bean
	@PreDestroy public
	void Destory () {
		System.out.println ("Destory");
	}
}

applicationcontext.xml Configuration:

<?xml version= "1.0" encoding= "UTF-8"?> <beans xmlns=
"Http://www.springframework.org/schema/beans"
	xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" xmlns:context= "Http://www.springframework.org/schema /context "
	xsi:schemalocation=" Http://www.springframework.org/schema/beans 
           http:// Www.springframework.org/schema/beans/spring-beans-3.0.xsd
           Http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-3.0.xsd ">
	<context:component-scan Base-package= "com.mth" ></context:component-scan>
	
</beans>

Test Code:

Package com.mth.test;

Import Org.springframework.context.support.ClassPathXmlApplicationContext;

Import com.mth.bean.Student;
Import Com.mth.service.Service;

public class Test {

	/**
	 * @Title: Main
	 * @Description: Test spring annotation
	 * @param @param args Set file
	 * @return void return type
	 * @throws
	 *
	/public static void main (string[] args) {
		classpathxmlapplicationcontext context = new Classpathxmlapplicationcontext (
				"Applicationcontext.xml");
		Getbean parameter must be the service class above @component ("Stuser") inside the parameter
		service service = (service) Context.getbean ("Stuser");
		Service.savestu (New Student ());
		Context.destroy ();
	}