《读spring源码》5注解@ComponentScan的includeFilters 和excludeFilters

过滤类型有如下五种：

		FilterType type() default FilterType.ANNOTATION;

根据注解进行刷选并不使用默认值刷选出，controller的bean

package com.enjoy.cap2.MainConfiguer;


import com.enjoy.cap1.Person;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;

@Configuration
@ComponentScan(value = "com.enjoy.cap2",includeFilters = {
            @ComponentScan.Filter(type = FilterType.ANNOTATION,classes = {Controller.class})
    },useDefaultFilters = false)//扫描组件
public class MainConfig {
    @Bean
    public Person person1(){
        return new Person("张三",22);
    }
}

package test;

import com.enjoy.cap2.MainConfiguer.MainConfig;
import org.junit.jupiter.api.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class MainTEwst {

    @Test
    public void sss(){
        AnnotationConfigApplicationContext annotationConfigApplicationContext = new AnnotationConfigApplicationContext(MainConfig.class);
        String[] beanDefinitionNames = annotationConfigApplicationContext.getBeanDefinitionNames();
        for(String name:beanDefinitionNames){
            System.out.println(name);
        }
    }
}

输出结果

controller打印出来了但是其他的@service和@Repository没有打印出来

排除的时候 需要excludeFilters 和useDefaultFilters = true，

package com.enjoy.cap2.MainConfiguer;


import com.enjoy.cap1.Person;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;

@Configuration
@ComponentScan(value = "com.enjoy.cap2",excludeFilters = {
            @ComponentScan.Filter(type = FilterType.ANNOTATION,classes = {Controller.class})
    },useDefaultFilters = true)//扫描组件
public class MainConfig {
    @Bean
    public Person person1(){
        return new Person("张三",22);
    }
}

test的结果 并没有打印出controller

指定排除一个类：

package com.enjoy.cap2.MainConfiguer;


import com.enjoy.cap1.Person;
import com.enjoy.cap2.controller.OderController;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;

@Configuration
@ComponentScan(value = "com.enjoy.cap2",excludeFilters = {
            @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE,classes = {OderController.class})
    },useDefaultFilters = true)//扫描组件
public class MainConfig {
    @Bean
    public Person person1(){
        return new Person("张三",22);
    }
}

打印结果没有这个类

指定添加一个类 注意useDefaultFilters = false

package com.enjoy.cap2.MainConfiguer;


import com.enjoy.cap1.Person;
import com.enjoy.cap2.controller.OderController;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;

@Configuration
@ComponentScan(value = "com.enjoy.cap2",includeFilters  = {
            @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE,classes = {OderController.class})
    },useDefaultFilters = false)//扫描组件
public class MainConfig {
    @Bean
    public Person person1(){
        return new Person("张三",22);
    }
}

注意打印结果有oderController但是没有其他的bean