Spring高级注入之Field值注入

filed数值（也就是静态常量）注入是通过fieldRetrievingFactoryBean完成的，这个类用来获取目标bean的filed数值

packageBean.superIOCfield;

publicclassField...{
publicstaticfinalStringTEST_FIELD="welcom";
}

实体类：

packageBean.superIOCfield;

publicclassPerson...{
privateSonson;
privateStringage;
publicStringgetAge()...{
returnage;
}
publicvoidsetAge(Stringage)...{
this.age=age;
}
publicSongetSon()...{
returnson;
}
publicvoidsetSon(Sonson)...{
this.son=son;
}
}


packageBean.superIOCfield;

publicclassSon...{
privateStringage;

publicStringgetAge()...{
returnage;
}

publicvoidsetAge(Stringage)...{
this.age=age;
}
}

配置文件：

<?xmlversion="1.0"encoding="UTF-8"?>
<!DOCTYPEbeansPUBLIC"-//SPRING//DTDBEAN//EN""http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<beanid="son"class="Bean.superIOCfield.Son">
<propertyname="age">
<beanid="Bean.superIOCfield.Field.TEST_FIELD"class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"></bean>
</property>
</bean>
</beans>

测试代码：

publicstaticvoidmain(String[]args)throwsException...{

Stringpath=newTest().getClass().getResource("/").getPath();
Stringrealpath=path.substring(1,path.length());
ApplicationContextcontext=newFileSystemXmlApplicationContext(realpath+"/superIOCfield.xml");
Sonson1=(Son)context.getBean("son");


System.out.println("personageis:"+son1.getAge());

}

运行结果：

person age is:welcom