spring ioc---bean之间的关系

1，继承；
2，依赖；
3，引用；

package entity;

public class Dog {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

package entity;


public class People {

    private int id;
    private String name;
    private int age;
    private Dog dog;
    
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    
    public Dog getDog() {
        Dog dog=new Dog(); //生成新的狗
        dog.setName("Jack");
        return dog;
    }
    public void setDog(Dog dog) {
        this.dog = dog;
    }
    @Override
    public String toString() {
        return "People [id=" + id + ", name=" + name + ", age=" + age
                + ", dog=" + dog.getName() + "]";
    }
}

package entity;

import java.lang.reflect.Method;

import org.springframework.beans.factory.support.MethodReplacer;


public class People2 implements MethodReplacer {

    @Override
    public Object reimplement(Object arg0, Method arg1, Object[] arg2)
            throws Throwable {
        Dog dog=new Dog();
        dog.setName("Tom");
        return dog;
    }
    
}

package test;

import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.java1234.entity.People;

public class T {

    private ApplicationContext ac;

    @Before
    public void setUp() throws Exception {
        ac=new ClassPathXmlApplicationContext("beans.xml");
    }

    @Test
    public void test1() {
        People people=(People)ac.getBean("people1");
        System.out.println(people.getDog().getName());
    }
    

}

<?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="people1" class="entity.People">
        <property name="id" value="1"></property>
        <property name="name" value="张三"></property>
        <property name="age" value="11"></property>
        <!-- 用的是people2的狗 -->
        <replaced-method name="getDog" replacer="people2"></replaced-method>
    </bean>
    
    <bean id="people2" class="entity.People2"></bean>
</beans>

 

 

 

 

 

 

 

 

 

 

 

package entity;

public class Dog {

    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    
    
}

package entity;


public class People {

    private int id;
    private String name;
    private int age;
    private String className;
    private Dog dog;
    
    public People() {
        System.out.println("初始化People");
    }
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getClassName() {
        return className;
    }
    public void setClassName(String className) {
        this.className = className;
    }
    
    
    public Dog getDog() {
        return dog;
    }
    public void setDog(Dog dog) {
        this.dog = dog;
    }
    @Override
    public String toString() {
        return "People [id=" + id + ", name=" + name + ", age=" + age
                + ", className=" + className + ", dog=" + dog + "]";
    }
}

package service;

public class Authority {

    public Authority() {
        System.out.println("获取权限");
    }
}

package test;

import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import entity.People;

public class T {

    private ApplicationContext ac;

    @Before
    public void setUp() throws Exception {
        ac=new ClassPathXmlApplicationContext("beans.xml");
    }

    @Test
    public void test1() {
        People zhangsan=(People)ac.getBean("zhangsan");
        System.out.println(zhangsan);
        
        People lisi=(People)ac.getBean("lisi");
        System.out.println(lisi);
    }
    

}

<?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="dog" class="entity.Dog">
        <property name="name" value="jack"></property>
    </bean>
    
    <!-- 定义一个抽象的类 -->
    <bean id="abstractPeople" class="entity.People" abstract="true">
        <!-- 这是他们的共同属性 -->
        <property name="className" value="高三5班"></property>
        <property name="age" value="19"></property>
    </bean>
    
    <!-- 继承abstractPeople。depends-on依赖属性，依赖autority，在初始化这个bean之前先初始化依赖属性 -->
    <bean id="zhangsan" parent="abstractPeople" depends-on="autority">
        <!-- 自己的属性 -->
        <property name="id" value="1"></property>
        <property name="name" value="张三"></property>
    </bean>
    
    <!-- 继承abstractPeople -->
    <bean id="lisi" parent="abstractPeople">
    <!-- 重写的属性 -->
        <property name="id" value="2"></property>
        <property name="name" value="李四"></property>
        <property name="age" value="20"></property>
        <!-- 引用属性 -->
        <property name="dog" ref="dog"></property>
    </bean>
    
    
    <bean id="autority" class="service.Authority"></bean>
</beans>