Spring Framework_学习记录_14

版权声明： https://blog.csdn.net/qq_38386316/article/details/88743742

1.Component And Annotations

• Circle.java

package org.zcs.spring;

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

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;
 
@Component
public class Circle implements Shape {

	private Point center;
	public Point getCenter() {
		return center;
	}
	 @Resource 
	public void setCenter(Point center) {
		this.center = center;
	}
	 @PostConstruct
	 public void initlize() {
		 System.out.println("initlizing a circle ");
	 }
	 @PreDestroy
	 public void destroy() {
		 System.out.println("destroy a circle");
	 }
	@Override
	public void draw() {
		// TODO Auto-generated method stub
		System.out.println("Drawing Circle:");
		System.out.println("Circle : point is : " + center.getX() +","  + center.getY());
		
	}
	
}

• Triangle.java

package org.zcs.spring;

 

public class Triangle   implements Shape {
	private Point pointA;
	private Point pointB;
	private Point pointC;
	public Point getPointA() {
		return pointA;
	}

	public void setPointA(Point pointA) {
		this.pointA = pointA;
	}

	public Point getPointB() {
		return pointB;
	}

	public void setPointB(Point pointB) {
		this.pointB = pointB;
	}

	public Point getPointC() {
		return pointC;
	}

	public void setPointC(Point pointC) {
		this.pointC = pointC;
	}
	public void draw () {
		System.out.println("Drawing Triangle :");
		System.out.println("This is PointA: (" +pointA.getX()  +"," + pointA.getY() +")");
		System.out.println("This is PointB: (" +pointB.getX()  +"," + pointB.getY() +")");
		System.out.println("This is PointC: (" +pointC.getX()  +"," + pointC.getY() +")");
}

 

}

• spring.xml

<?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"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd">
 			<context:annotation-config  />
<!--    
   	<bean id = "triangle" class= "org.zcs.spring.Triangle"  autowire= "byName"  >
 		  
 		 <property name="pointA" ref = "pointA"></property>
 		 <property name="pointB" ref = "pointB"></property>
 		 <property name="pointC" ref = "pointC"></property>
 		
   	</bean> -->
   	
   	<bean id= "pointA" class = "org.zcs.spring.Point">

   		 <qualifier  value = "circleRelated"></qualifier>
   		<property name="x"  value = "${pointA.pointX}"></property>
   		<property name="y"  value = "${pointA.pointY}"></property>
   	</bean>
   	<bean id= "pointB" class = "org.zcs.spring.Point">
		<property name="x"  value = "20"></property>
		<property name="y"  value = "0"></property>
	</bean>

 	<bean id= "center" class = "org.zcs.spring.Point">
		   <property name="x"  value = "0"></property>
		   <property name="y"  value = "20"></property>
   	</bean>
 	
   	<!--  <bean id = "circle" class= "org.zcs.spring.Circle"   >
 		 
   	</bean> -->
   	<context:component-scan base-package="org.zcs.spring"></context:component-scan>
   	 	<bean class = "org.zcs.spring.MyBeanFactory" ></bean>
   	<bean class = "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
   		<property name="locations" value = "pointsconfig.properties"></property>
   	</bean>
   	 <bean class = "org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor">
   	 </bean>
   	
  </beans>
 

学习记录

• 学习了一个神奇的注释：component，<context:component-scan base-package="org.zcs.spring"></context:component-scan>，直接就能显示运行circle.