Spring 6.0官方文档示例（10): idref 的用法

package cn.edu.tju.domain;

public class TheTargetBean {
    public static  String getString(){
        return "yes,it is";
    }
}

package cn.edu.tju.domain;

public class TheClientBean {
    private String theTargetBean;

    public String getTheTargetBean() {
        return theTargetBean;
    }

    public void setTheTargetBean(String theTargetBean) {
        this.theTargetBean = theTargetBean;
    }
}

<?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
  https://www.springframework.org/schema/beans/spring-beans.xsd">


    <bean id="theTargetBean" class="cn.edu.tju.domain.TheTargetBean" factory-method="getString"/>


    <bean id="theClientBean" class="cn.edu.tju.domain.TheClientBean" >
        <property name="theTargetBean">
            <idref bean="theTargetBean"/>
        </property>
    </bean>
    <bean id="theClientBean2" class="cn.edu.tju.domain.TheClientBean">
        <property name="theTargetBean" value="theTargetBean"/>
    </bean>


</beans>

theClientBean和theClientBean2两者是等价的。
通过idref注入String 类型的其它bean的名字，能够提供错误检查机制，防止拼写错误