java spring Initializing Collections 初始化集合

Initializing Collections 集合 -- List

DrawingApp.java

package zxl;


import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class DrawingApp {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		ApplicationContext context=new ClassPathXmlApplicationContext("spring.xml");
		Triangle triangle =(Triangle) context.getBean("triangle");
		triangle.draw();
	}

}

Point.java

package zxl;

public class Point {
	private int x;
	private int y;
	
	public int getX() {
		return x;
	}
	public void setX(int x) {
		this.x = x;
	}
	public int getY() {
		return y;
	}
	public void setY(int y) {
		this.y = y;
	}
	
}

Triangle.java

package zxl;

import java.util.List;


public class Triangle {
	
	private List<Point> points;
	
	public List<Point> getPoints() {
		return points;
	}

	public void setPoints(List<Point> points) {
		this.points = points;
	}
	
	public void draw(){
		for(Point point:points){
		System.out.println("point = ("+point.getX()+","+point.getY()+")");
		}
	}
}

spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>

    <bean id="triangle" name="triangle-name" class="zxl.Triangle" >
        <property name="points" >
            <list>
                <ref bean="zeroPoint" />
                <ref bean="point2" />
                <ref bean="point3" />
            </list>
        </property>
    </bean>

    <bean id="zeroPoint" class="zxl.Point" >
        <property name="x" value="0" />
        <property name="y" value="0" />
    </bean>

    <bean id="point2" class="zxl.Point" >
        <property name="x" value="-20" />
        <property name="y" value="0" />
    </bean>

    <bean id="point3" class="zxl.Point" >
        <property name="x" value="20" />
        <property name="y" value="0" />
    </bean>

</beans>