<!-- person has a property type of class "ability" -->
	<bean id="person" class="com.h3.common.person" autowire="bytype" />
		
	<bean id="invisible" class="com.h3.common.ability" >
		<property name="skill" value="invisible" />
	</bean>

1. beans

package com.h3.common;
 
public class person 
{
	private ability ability;
	//...
}

package com.h3.common;
 
public class ability 
{
	private string skill;
	//...
}

2. spring wiring

<bean id="person" class="com.h3.common.person">
		<property name="ability" ref="invisible" />
	</bean>
	
	<bean id="invisible" class="com.h3.common.ability" >
		<property name="skill" value="invisible" />
	</bean>

输出

person [ability=ability [skill=invisible]]

<bean id="person" class="com.h3.common.person" autowire="bytype" />
	
	<bean id="invisible" class="com.h3.common.ability" >
		<property name="skill" value="invisible" />
	</bean>

输出

person [ability=ability [skill=invisible]]

<bean id="person" class="com.h3.common.person" autowire="bytype" />
	
	<bean id="steal" class="com.h3.common.ability" >
		<property name="skill" value="steal" />
	</bean>
	
	<bean id="invisible" class="com.h3.common.ability" >
		<property name="skill" value="invisible" />
	</bean>

输出

exception in thread "main" org.springframework.beans.factory.unsatisfieddependencyexception: 
...
no unique bean of type [com.h3.common.ability] is defined: 
expected single matching bean but found 2: [steal, invisible]; nested exception is 
org.springframework.beans.factory.nosuchbeandefinitionexception: 
no unique bean of type [com.h3.common.ability] is defined: 
expected single matching bean but found 2: [steal, invisible]