Spring框架——基於XML文件方式的Bean配置

package news;

public class Address {
private String city;
private String school;
public Address(String city, String school) {
	super();
	this.city = city;
	this.school = school;
}
public Address() {
	this.city = "杭州";
	this.school = "浙江大學";
}
public String getCity() {
	return city;
}
public void setCity(String city) {
	this.city = city;
}
public String getSchool() {
	return school;
}
public void setSchool(String school) {
	this.school = school;
}

}

package news;

public class Students {
	private String name;
	private int age;
	Address address;
	public Students(String name, int age, Address address) {
		super();
		this.name = name;
		this.age = age;
		this.address = address;
	}
	public Students() {
		super();
		// TODO Auto-generated constructor stub
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
	

}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean name="a1" class="news.Address">
<constructor-arg  index="0" type="java.lang.String" value="山東"></constructor-arg>
<constructor-arg  index="1" type="java.lang.String" value="山東農業大學"></constructor-arg>
</bean>

<bean name="a2"  class="news.Address"></bean>

<bean name="a3"  class="news.Address">
<property name="city" value="北京"></property>
<property name="school" value="解放軍大學"></property>
</bean>

<bean name="a4"  class="news.Address">
<property name="city" value="北京"></property>
<property name="school" value="解放軍大學"></property>
</bean>
<bean name="s1" class="news.Students">
<property name="name" value="曾傑"></property>
<property name="age" value="21"></property>
<property name="address" ref="a4"></property>
</bean>
</beans>

package news;

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

public class main {

	public static void main(String[] args) {
		//創建一個容器實例
		ApplicationContext act=new ClassPathXmlApplicationContext("news.xml");
		Address address1;//帶參數的構造器注入
		Address address2;//無參數的構造器注入
		Address address3;//先調用無參構造器，再調用getset
		Students ss;//先調用無參構造器，再調用getset注入引用屬性
		address1=(Address)act.getBean("a1");
		System.out.println("城市："+address1.getCity()+"    學校："+address1.getSchool());
		
		address2=(Address)act.getBean("a2");
		System.out.println("城市："+address2.getCity()+"    學校："+address2.getSchool());
		
		address3=(Address)act.getBean("a3");
		System.out.println("城市："+address3.getCity()+"    學校："+address3.getSchool());
		
		ss=(Students)act.getBean("s1");
		System.out.println("姓名："+ss.getName()+"    年齡："+ ss.getAge()+"    城市："+ss.getAddress().getCity()+"    學校："+ss.getAddress().getSchool());
	}

}