Spring Bean的自动装配

ゞ浴缸里的玫瑰 2022-10-11 03:42 222阅读 0赞

一个人有2个宠物，分别为cat 和dog  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDYzMTc1_size_16_color_FFFFFF_t_70]

package com.yang;
    
    public class Cat { 
        public void shout(){ 
            System.out.println("cat shout");
        }
    }

package com.yang;
    
    public class Dog { 
        public void shout(){ 
            System.out.println("Dog shout");
        }
    }

package com.yang;
    
    import org.springframework.beans.factory.annotation.Autowired;
    
    public class People { 
        @Autowired
        private  Cat cat;
        @Autowired
        private Dog dog;
        private  String name;
        public Cat getCat() { 
            return cat;
        }
    
        public void setCat(Cat cat) { 
            this.cat = cat;
        }
    
        public Dog getDog() { 
            return dog;
        }
    
        public void setDog(Dog dog) { 
            this.dog = dog;
        }
    
        public String getName() { 
            return name;
        }
    
        public void setName(String name) { 
            this.name = name;
        }
    
    
        @Override
        public String toString() { 
            return "People{" +
                    "cat=" + cat +
                    ", dog=" + dog +
                    ", name='" + name + '\'' +
                    '}';
        }
    }

IOC容器内容为：

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:c="http://www.springframework.org/schema/c" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd ">
    
    <context:annotation-config></context:annotation-config>
    
         <bean id="cat" class="com.yang.Cat"/>
        <bean id="dog" class="com.yang.Dog"/>
    
    
        <bean id="people" class="com.yang.People" autowire="byName">
            
            <property name="name" value="yyl"> </property>
    
    
        </bean>
    
    </beans>

测试类

import com.yang.People;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Mytest { 
        public static void main(String[] args) { 
            //获取上下文
            ApplicationContext conteWxt = new ClassPathXmlApplicationContext("auto.xml");
            //拿去对
            //Student stu = (Student)conteWxt.getBean("student");
            People people = (People)conteWxt.getBean("people",People.class);
            people.getCat().shout();
            people.getDog().shout();
        }
    }

运行测试类结果：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDYzMTc1_size_16_color_FFFFFF_t_70 1]  
总结：  
![在这里插入图片描述][20210630002228291.png]  
![在这里插入图片描述][20210714004457501.png]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDYzMTc1_size_16_color_FFFFFF_t_70]: /images/20221005/6bee787308e7416680a253565c807f6b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM5NDYzMTc1_size_16_color_FFFFFF_t_70 1]: /images/20221005/cc10af4352584987a5dba92f7671781c.png
[20210630002228291.png]: /images/20221005/cb17ab6fd6ce441a8c8ef7a94d7ec1d9.png
[20210714004457501.png]: /images/20221005/7e3cf7ef9148480496a3befaaaae5e4a.png