Spring学习(九)-----Spring使用@Required注解依赖检查

package com.yiibai.common;

import org.springframework.beans.factory.annotation.Required;

public class Customer 
{
    private Person person;
    private int type;
    private String action;
    
    public Person getPerson() {
        return person;
    }
    @Required
    public void setPerson(Person person) {
        this.person = person;
    }
}

<beans 
    ...
    xmlns:context="http://www.springframework.org/schema/context"
    ...
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">
    ...
    <context:annotation-config />
    ...
</beans>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-2.5.xsd">

    <context:annotation-config />

    <bean id="CustomerBean" class="com.yiibai.common.Customer">
        <property name="action" value="buy" />
        <property name="type" value="1" />
    </bean>

    <bean id="PersonBean" class="com.yiibai.common.Person">
        <property name="name" value="yiibai" />
        <property name="address" value="address ABC" />
        <property name="age" value="29" />
    </bean>
    
</beans>

<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-2.5.xsd">
<bean 
class="org.springframework.beans.factory.annotation.RequiredAnnotationBeanPostProcessor"/>
    
    <bean id="CustomerBean" class="com.yiibai.common.Customer">
        <property name="action" value="buy" />
        <property name="type" value="1" />
    </bean>

    <bean id="PersonBean" class="com.yiibai.common.Person">
        <property name="name" value="yiibai" />
        <property name="address" value="address ABC" />
        <property name="age" value="29" />
    </bean>    
</beans>

org.springframework.beans.factory.BeanInitializationException: 
    Property ‘person‘ is required for bean ‘CustomerBean‘