Spring构造注入

1、class Student

package com.di02;

public class Student {
private String name;
private int age;
private School school;

public Student() {
	super();
}
public Student(String name, int age, School school) {
	super();
	this.name = name;
	this.age = age;
	this.school = school;
}
public void setName(String name) {
	System.out.println("执行setName");
	this.name = name;
}
public void setAge(int age) {
	System.out.println("执行setAge");
	this.age = age;
}

public void setSchool(School school) {
	this.school = school;
}

@Override
public String toString() {
	return "Student [name=" + name + ", age=" + age + ", school=" + school + "]";
}

}

2、class MyTest

package com.di02;

import org.junit.Test;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;

public class MyTest {

@Test
public void test01() {
	ApplicationContext ac = new ClassPathXmlApplicationContext("com/di02/applicationContext.xml");
	Student student = (Student) ac.getBean("myStudent");
	System.out.println(student);
}

}

3、applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>

<!-- 注册School -->
<bean id="mySchool" class="com.di02.School">
	<constructor-arg index="0" value="清华大学"/>
</bean>

<!-- 注册Student -->
<bean id="myStudent" class="com.di02.Student">
	<!-- 方式1-->
	<!-- <constructor-arg index="0" value="李四"/>
	<constructor-arg index="1" value="22"/>
	<constructor-arg index="2" ref="mySchool"/>
	-->		
	<!-- 方式2 -->
	<!-- 
	<constructor-arg value="李四"/>
	<constructor-arg value="22"/>
	<constructor-arg ref="mySchool"/>
	 -->
	<!-- 方式3 -->
	 
	<constructor-arg name="name" value="李四"/>
	<constructor-arg name="age" value="22"/>
	<constructor-arg name="school" ref="mySchool"/>
	
</bean>