spring-02-hello

package com.xu.pojo;
public class Bye {
    private String bye;
    @Override
    public String toString() {
        return "再见啦！";
    }
    public String getBye() {
        return bye;
    }
    public void setBye(String bye) {
        this.bye = bye;
    }
}

package com.xu.pojo;
public class Hello {
    private String str;
    public String getStr() {
        return str;
    }
    public void setStr(String str) {
        this.str = str;
    }
    @Override
    public String toString() {
        return "你好呀！";
    }
}

<?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">
    <!--使用Spring来创建对象，在Spring这些都称为Bean
         类型   变量名= new 类型();
         Hello  hello=new  Hello();
         id=>   变量名
         class=>new的对象
         property=>相当于给对象中的属性赋值
    -->
    <bean id="hello1" class="com.xu.pojo.Hello">
        <property name="str" value="Spring"/>
    </bean>
    <bean id="bye1" class="com.xu.pojo.Bye">
        <property name="bye" value="Bye~"/>
    </bean>
</beans>

import com.xu.pojo.Bye;
import com.xu.pojo.Hello;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {
    public static void main(String[] args) {
        //获取Spring的上下文对象
        ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
        //我们的对象都在Spring中的管理了，我们要使用，直接去里面取出来就可以了
        Hello hello = (Hello) context.getBean("hello1");
        System.out.println(hello.toString());
        Bye bye= (Bye) context.getBean("bye1");
        System.out.printf(bye.toString());
    }
}