1.SingletonBeanFactoryLocator

以单例的形式将特定的xml文件初始化BeanFactory
默认为:"classpath*:beanRefFactory.xml"，也可以指定特定的路径

路径地址:
org/springframework/beans/factory/access/SingletonBeanFactoryLocatorTests-ref1.xml

BeanFactoryLocator facLoc = SingletonBeanFactoryLocator.getInstance(
                ClassUtils.addResourcePathToPackagePath(CLASS, REF1_XML));

SingletonBeanFactoryLocatorTests-ref1.xml:

<beans>

  <!-- this definition could be inside one beanRefFactory.xml file -->
  <bean id="a.qualified.name.of.some.sort"
      class="org.springframework.beans.factory.xml.XmlBeanFactory">
    <constructor-arg value="org/springframework/beans/factory/access/SingletonBeanFactoryLocatorTests-beans1.xml"/>
  </bean>

  <!-- while the following two could be inside another, also on the classpath,
    perhaps coming from another component jar -->

  <bean id="another.qualified.name"
      class="org.springframework.beans.factory.xml.XmlBeanFactory">
    <constructor-arg value="org/springframework/beans/factory/access/SingletonBeanFactoryLocatorTests-beans1.xml"/>
    <constructor-arg ref="a.qualified.name.of.some.sort"/> <!-- parent bean factory -->
  </bean>

  <alias name="another.qualified.name" alias="a.qualified.name.which.is.an.alias"/>

</beans>

SingletonBeanFactoryLocatorTests-beans1.xml

<beans>

  <bean id="beans1.bean1" class="org.springframework.beans.factory.access.TestBean">
    <property name="name"><value>beans1.bean1</value></property>
  </bean>

  <bean id="beans1.bean2" class="org.springframework.beans.factory.access.TestBean">
    <property name="name"><value>bean2</value></property>
    <property name="objRef"><ref bean="beans1.bean2"/></property>
  </bean>

</beans>

测试代码:

    protected void getInstanceTest1(BeanFactoryLocator facLoc) {
        BeanFactoryReference bfr = facLoc.useBeanFactory("a.qualified.name.of.some.sort");
        BeanFactory fac = bfr.getFactory();
        BeanFactoryReference bfr2 = facLoc.useBeanFactory("another.qualified.name");
        fac = bfr2.getFactory();
        // verify that the same instance is returned
        TestBean tb = (TestBean) fac.getBean("beans1.bean1");
        assertTrue(tb.getName().equals("beans1.bean1"));
        tb.setName("was beans1.bean1");
        BeanFactoryReference bfr3 = facLoc.useBeanFactory("another.qualified.name");
        fac = bfr3.getFactory();
        tb = (TestBean) fac.getBean("beans1.bean1");
        assertTrue(tb.getName().equals("was beans1.bean1"));

        BeanFactoryReference bfr4 = facLoc.useBeanFactory("a.qualified.name.which.is.an.alias");
        fac = bfr4.getFactory();
        tb = (TestBean) fac.getBean("beans1.bean1");
        assertTrue(tb.getName().equals("was beans1.bean1"));

        bfr.release();
        bfr3.release();
        bfr2.release();
        bfr4.release();
    }

2.ContextSingletonBeanFactoryLocator

与SingletonBeanFactoryLocator类似,不过BeanFactory是以ClassPathXmlApplicationContext来初始化的

使用方法类似

    @Test
    public void test2() {
        BeanFactoryLocator facLoc = DefaultLocatorFactory.getInstance();
        facLoc=ContextSingletonBeanFactoryLocator.getInstance();
        BeanFactoryReference bfr = facLoc.useBeanFactory(null);
        basicFunctionalityTest(facLoc);
    }