public class HelloWord {private String name;public void hello(){System.out.println("Hello:" + name);}public String getName() {return name;}public void setName(String name) {System.out.println("setname...");this.name = name;}public HelloWord() {System.out.println("con..");}
}

<!-- HelloWord --><!-- 配置Beanclass：是利用反射的原理，通过全类名方式在IOC容器中创建Bean，所以要求Bean必须有无参的构造器id:标识容器中的Bean，id的值唯一--><!-- 属性注入 -->
<bean id="helloword" class="com.MrChengs1.HelloSpring.HelloWord"><property name="name" value="spring"></property>
</bean>

//1创建Spring的IOC容器对象
//ApplicationContext代表IOC容器
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
//注意：此时setter方法和无参的构造器已经被调用了

//2.IOC容器获得Bean实列
//getBean获得的是配置文件的 id的值
//利用id定位到容器中的Bean
HelloWord helloWord = (HelloWord) ctx.getBean("helloword");

//利用类型得到IOC中的Bean
//该方法不需要进行强制转换，但是如果我们有两个class类在Helloword的话，即在配置文件中，实例化两个HelloWord类，此时不知道返回哪一个类
//HelloWord helloWord = ctx.getBean(HelloWord.class);

//3.调用hello方法
helloWord.hello();

con..
setname...
Hello:spring

<!-- 属性注入 -->
<bean id="helloword" class="com.MrChengs1.HelloSpring.HelloWord"><property name="name" value="spring"></property>
</bean>

public class car {private String brand;private String corp;private double price;private int maxSpeech;public car(String brand, String corp, double price) {super();this.brand = brand;this.corp = corp;this.price = price;}public car(String brand, String corp, int maxSpeech) {super();this.brand = brand;this.corp = corp;this.maxSpeech = maxSpeech;}
public car() {super();// TODO Auto-generated constructor stub
    }public car(String brand, String corp, double price, int maxSpeech) {super();this.brand = brand;this.corp = corp;this.price = price;this.maxSpeech = maxSpeech;}　　//setter.....
}

<!-- 构造器注入                       使用构造器方法可以指定参数的位置和类型，以区分重载构造器-->
<bean id="car" class="com.MrChengs1.HelloSpring.car"><constructor-arg value="LeiNuo" index="0"></constructor-arg><constructor-arg value="shanghai" index="1"></constructor-arg><constructor-arg value="300" index="2"></constructor-arg>
</bean>

ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

car car = (com.MrChengs1.HelloSpring.car) ctx.getBean("car");
System.out.println(car.toString());

car [brand=LeiNuo, corp=shanghai, price=0.0, maxSpeech=300]

<bean id="car1" class="com.MrChengs.HelloSpring.car"><constructor-arg value="AoDI" index="0"></constructor-arg><constructor-arg value="shanghai" index="1"></constructor-arg><constructor-arg value="240" index="2" type="int"></constructor-arg></bean> 

<bean id="car1" class="com.MrChengs1.HelloSpring.car"><constructor-arg value="AoDI" index="0"></constructor-arg><constructor-arg  index="1"><value><![CDATA[<shanghai>]]></value></constructor-arg><constructor-arg  index="2" type="int"><value>245</value></constructor-arg>
</bean>

       car car1 = (com.MrChengs1.HelloSpring.car) ctx.getBean("car1");System.out.println(car1.toString());

car [brand=AoDI, corp=<shanghai>, price=0.0, maxSpeech=245]

public class Person {private String name;private int age;private car car;public Person(String name, int age, com.MrChengs1.HelloSpring.car car) {super();this.name = name;this.age = age;this.car = car;}public Person() {super();
    }//setter....
}

<!-- 引用其他的bean    属性注入-->
<bean id='person' class="com.MrChengs1.HelloSpring.Person"><property name="name" value="Tom"></property><property name="age" value="18"></property>　　<!--引用其他bean --><!-- <property name="car"><ref bean="car"/></property> --><!-- <property name="car" ref="car1"></property> --> <!-- 内部bean --><property name="car"><bean class="com.MrChengs1.HelloSpring.car"><constructor-arg value="Ford" index="0"></constructor-arg><constructor-arg value="beijing" index="1"></constructor-arg><constructor-arg value="100000" index="2"></constructor-arg></bean></property>
</bean>

       Person p = (Person) ctx.getBean("person");System.out.println(p);

Person [name=Tom, age=18, car=car [brand=Ford, corp=beijing, price=0.0, maxSpeech=100000]]

<!-- 引用其他的bean    构造器注入-->
<bean id="person1"  class="com.MrChengs1.HelloSpring.Person" ><constructor-arg value="Jerry"></constructor-arg><constructor-arg value="34"></constructor-arg><constructor-arg ref="car"></constructor-arg>
</bean>

       Person p1 = (Person) ctx.getBean("person1");System.out.println(p1);

Person [name=Jerry, age=34, car=car [brand=LeiNuo, corp=shanghai, price=0.0, maxSpeech=120]]

<!-- 测试null 和 级联属性 -->
<bean id="person2"  class="com.MrChengs1.HelloSpring.Person" ><constructor-arg value="Bob"></constructor-arg><constructor-arg value="32"></constructor-arg><!-- null --> <!-- <constructor-arg ><null/></constructor-arg> --><!-- 级联   此时没有maxSpeech的值--><!-- 属性需要先初始化，后才可以为其级联属性赋值 --><constructor-arg ref="car"></constructor-arg><property name="car.maxSpeech" value="120"></property>
</bean>

       Person p2 = (Person) ctx.getBean("person2");System.out.println(p2);

Person [name=Bob, age=32, car=car [brand=LeiNuo, corp=shanghai, price=0.0, maxSpeech=120]]

    xmlns:p="http://www.springframework.org/schema/p"

<!-- P命名空间  先导入命名空间 -->
<bean id="person6" class="com.MrChengs2.Collection.Person" p:name="MrCheng" p:age="22"p:cars-ref="cars"></bean>
</beans>