[刘阳Java]_Spring相关配置介绍_第5讲

package com.gxa.spring.day02;

public class PetServiceImpl {
    
    private PetDaoImpl petDao; //依赖对象
    
    public PetServiceImpl(PetDaoImpl petDao) { //构造方法的DI
        this.petDao = petDao;
    }
    
    public void selectPet() {
        petDao.selectPet();
    }
}

package com.gxa.spring.day02;

public class PetDaoImpl {
    
    public void selectPet() {
        /**
         * 完成宠物数据查询
         */
        System.out.println("==宠物数据查询==");
    }
}

<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd">
    
    <bean id="petService" class="com.gxa.spring.day02.PetServiceImpl">
        <constructor-arg name="petDao" ref="petDao"></constructor-arg>
    </bean>
    
    <bean id="petDao" class="com.gxa.spring.day02.PetDaoImpl"></bean>
    
</beans>

package com.gxa.spring.day01;

public class PetServiceImpl {
    
    private PetDaoImpl petDao; //依赖对象
    private ItemDaoImpl itemDao; //依赖对象
    
    public void setPetDao(PetDaoImpl petDao) {
        this.petDao = petDao;
    }
    
    public void setItemDao(ItemDaoImpl itemDao) {
        this.itemDao = itemDao;
    }
    
    public void selectPet() {
        petDao.selectPet();
        itemDao.selectItem();
    }
}

package com.gxa.spring.day01;

public class PetDaoImpl {
    
    public void selectPet() {
        /**
         * 完成宠物数据查询
         */
        System.out.println("==宠物数据查询==");
    }
}

package com.gxa.spring.day01;

public class ItemDaoImpl {
    
    public void selectItem() {
        /**
         * 完成宠物分类数据查询
         */
        System.out.println("==宠物分类的数据查询==");
    }
}

<?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="person" class="com.gxa.spring.day01.Person"></bean>
    
    <bean id="petService" class="com.gxa.spring.day01.PetServiceImpl">
        <property name="petDao" ref="petDao"></property>
        <property name="itemDao" ref="itemDao"></property>
    </bean>
    
    <bean id="petDao" class="com.gxa.spring.day01.PetDaoImpl"></bean>
    
    <bean id="itemDao" class="com.gxa.spring.day01.ItemDaoImpl"></bean>
</beans>