开发笔记:Spring4.0最基本的注入

　　<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>4.0.2.RELEASEversion>
dependency>

package com.cnblogs.yjmyzz.domain;
public abstract class Computer {
public abstract void showInfo();
}

package com.cnblogs.yjmyzz.domain;
public class MacBook extends Computer {
@Override
public void showInfo() {
System.out.println("\tApple MAC Book");
}
}

package com.cnblogs.yjmyzz.domain;
public class ThinkPad extends Computer {
@Override
public void showInfo() {
System.out.println("\tLenovo ThinkPad");
}
}

package com.cnblogs.yjmyzz.domain;
public abstract class Pet {
public abstract void welcomeMeToHome();
}

package com.cnblogs.yjmyzz.domain;
public class Dog extends Pet {
@Override
public void welcomeMeToHome() {
System.out.println("\twang! wang!");
}
}

package com.cnblogs.yjmyzz.domain;
import java.util.List;
public class Programmer {
private String name;
private Pet pet;
private List computers;
public void setName(String name) {
this.name = name;
}
public List getComputers() {
return computers;
}
public void setComputers(List computers) {
this.computers = computers;
}
public void setPet(Pet pet) {
this.pet = pet;
}
public void show() {
System.out.print("My name is " + name);
System.out.print(", and I have " + computers.size() + " computer" + (computers.size() > 1 ? "s" : "") + ":");
System.out.println();
for (Computer c : computers) {
c.showInfo();
}
System.out.println("And I have a pet, everyday,when I go home, it will welcome me by ");
pet.welcomeMeToHome();
}
}

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 id="jimmy" class="com.cnblogs.yjmyzz.domain.Programmer">
<property name="name" value="jimmy.yang"/>
<property name="pet" ref="wangcai"/>
<property name="computers">
<list>
<ref bean="t60"/>
<ref bean="macbook_pro"/>
list>
property>
bean>
<bean id="t60" class="com.cnblogs.yjmyzz.domain.ThinkPad"/>
<bean id="macbook_pro" class="com.cnblogs.yjmyzz.domain.MacBook"/>
<bean id="wangcai" class="com.cnblogs.yjmyzz.domain.Dog"/>
beans>

package com.cnblogs.yjmyzz.utils;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class SpringUtils {
private static ApplicationContext applicationContext;
private static ApplicationContext getContext() {
if (applicatiOnContext== null) {
applicationContext = new ClassPathXmlApplicationContext("SimpleBeans.xml");
}
return applicationContext;
}
public static T getBean(Class clazz, String beanName) {
return getContext().getBean(beanName, clazz);
}
}

package com.cnblogs.yjmyzz.test;
import com.cnblogs.yjmyzz.domain.Programmer;
import com.cnblogs.yjmyzz.utils.SpringUtils;
import org.junit.Test;
public class TestSpring {
@Test
public void testSimpleInject(){
Programmer jimmy= SpringUtils.getBean(Programmer.class,"jimmy");
jimmy.show();
}
}