<?xml version="1.0" encoding="GBK"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns="http://www.springframework.org/schema/beans" xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

    <!--將class指定為FieldRetrievingFactoryBean，然後再指定 targetClass和targetField，就ok-->
    <bean id="theAge1" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean ">
        <property name="targetClass" value="java.sql.Connection"/>
        <property name="targetField" value="TRANSACTION_READ_UNCOMMITTED"/>
    </bean>

<!--這是簡寫，如果這裡是例項變數那麼staticField就要改啦-->
    <bean id="theAge2" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean ">
        <property name="staticField" value="java.sql.Connection.TRANSACTION_NONE"/>
    </bean>

    <!--一種比較高階的寫法-->
    <bean id="test" class="InstancePackage.Test">
        <property name="show">
            <!--<bean id="java.sql.Connection.TRANSACTION_NONE"-->
                  <!--class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"/>-->
            <util:constant static-field="java.sql.Connection.TRANSACTION_NONE"/>
        </property>
    </bean>

</beans>
 

package InstancePackage;

public class Test {
    private int show;

    public int getShow() {
        return show;
    }

    public void setShow(int show) {
        this.show = show;
    }
}

package TestPackage;

import InstancePackage.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class SpringTest {
    public static void main(String []args){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("beans.xml");
        System.out.println( applicationContext.getBean("theAge1",Integer.class));
        System.out.println( applicationContext.getBean("theAge2",Integer.class));
        System.out.println( applicationContext.getBean("test", Test.class).getShow());
    }
}
 

這是我看李剛編著的《輕量級javaEE企業應用實戰（第五版）-Struts2+Spring5+Hibernate5/JAP2》後總結出來的。