如何将Spring @Autowired必需属性变为false进行测试？

<bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor">
    <property name="requiredParameterValue" value="false" />
</bean>

@ContextConfiguration(initializers={DisableAutowireRequireInitializer.class})
public class TestCase {
    // Some tests
}

public class DisableAutowireRequireInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

@Override
public void initialize(ConfigurableApplicationContext applicationContext) {

    // Register the AutowiredAnnotationBeanPostProcessor while initalizing
    // the context so we get there before any @Autowire resolution happens
    // We set the "requiredParameterValue" so that @Autowire fields are not 
    // required to be resolved. Very useful for a test context
    GenericApplicationContext ctx = (GenericApplicationContext) applicationContext;
    ctx.registerBeanDefinition(AnnotationConfigUtils.AUTOWIRED_ANNOTATION_PROCESSOR_BEAN_NAME,
            BeanDefinitionBuilder
                .rootBeanDefinition(AutowiredAnnotationBeanPostProcessor.class)
                .addPropertyValue("requiredParameterValue", false)
                .getBeanDefinition());

    }

}

@Required

AutowiredAnnotationBeanPostProcessor

<context:annotation-driven/>