Spring高階注入之Field值注入
阿新 • • 發佈:2019-02-20
filed數值(也就是靜態常量)注入是通過fieldRetrievingFactoryBean完成的,這個類用來獲取目標bean的filed數值
packageBean.superIOCfield;publicclassField...{
publicstaticfinalStringTEST_FIELD="welcom";
}
實體類:
publicclassPerson...{
privateSonson;
privateStringage;
publicStringgetAge()...{
returnage;
}
publicvoid
this.age=age;
}
publicSongetSon()...{
returnson;
}
publicvoidsetSon(Sonson)...{
this.son=son;
}
}
packageBean.superIOCfield;
publicclassSon...{
privateStringage;
publicStringgetAge()...{
returnage;
}
publicvoidsetAge(Stringage)...{
this.age=age;
}
}
配置檔案:
<!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"
</property>
</bean>
</beans>
測試程式碼:
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());
}
執行結果:
person age is:welcom