041 Spring Boot中排除功能的处理

　　这个问题，原本是没有注意，主要是理解的不够深刻。

1.先看我的配置文件

 package com.springBoot.ioc.config;

 import com.springBoot.ioc.controller.StudentController;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.FilterType;

 /**
  * @Desciption 配置文件
  */
 /*@Configuration
 public class MySpringBootConfig {
     @Bean(name="student")
     public Student getStu(){
         Student student=new Student();
         student.setId(1L);
         student.setUsername("Tom");
         student.setPassword("123456");
         return student;
     }
 }*/
 @Configuration
 @ComponentScan(basePackages="com.springBoot.ioc.*",excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,classes = StudentController.class)})
 public class MySpringBootConfig{

 }

2.然后运行程序，看报错信息

 9:51:13.797 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@67b92f0a: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.event.internalEventListenerProcessor,org.springframework.context.event.internalEventListenerFactory,mySpringBootConfig]; root of factory hierarchy
 Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.springBoot.ioc.config.MySpringBootConfig]; nested exception is java.lang.IllegalArgumentException: @ComponentScan ANNOTATION type filter requires an annotation type: class com.springBoot.ioc.controller.StudentController
     at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:184)
     at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:316)
     at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233)
     at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:271)
     at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:91)
     at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:692)
     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:530)
     at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:88)
     at com.springBoot.ioc.test.IocTestDemo.main(IocTestDemo.java:17)
 Caused by: java.lang.IllegalArgumentException: @ComponentScan ANNOTATION type filter requires an annotation type: class com.springBoot.ioc.controller.StudentController
     at org.springframework.util.Assert.assignableCheckFailed(Assert.java:655)
     at org.springframework.util.Assert.isAssignable(Assert.java:586)
     at org.springframework.context.annotation.ComponentScanAnnotationParser.typeFiltersFor(ComponentScanAnnotationParser.java:142)
     at org.springframework.context.annotation.ComponentScanAnnotationParser.parse(ComponentScanAnnotationParser.java:102)
     at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:288)
     at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:245)
     at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:202)
     at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:170)
     ... 8 more

 Process finished with exit code 1

3.原因

　　在excludedFilters中的class属性指定的是Controller，Service之类的，不是具体的类。

　　应该是如下的程序：

 package com.springBoot.ioc.config;

 import com.springBoot.ioc.controller.StudentController;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.FilterType;
 import org.springframework.stereotype.Controller;

 /**
  * @Desciption 配置文件
  */
 /*@Configuration
 public class MySpringBootConfig {
     @Bean(name="student")
     public Student getStu(){
         Student student=new Student();
         student.setId(1L);
         student.setUsername("Tom");
         student.setPassword("123456");
         return student;
     }
 }*/
 @Configuration
 @ComponentScan(basePackages="com.springBoot.ioc.*",excludeFilters = {@ComponentScan.Filter(type = FilterType.ANNOTATION,classes = Controller.class)})
 public class MySpringBootConfig{

 }

4.注意点

　　导包的时候，也不要出错。