SpringBoot中TypeExcludeFilter的作用及使用方式

com.example
├── config
│   └── AppConfig.java
└── service
│   ├── HelloService.java
│   └── WorldService.java
└── MyApplication.java

@ComponentScan(excludeFilters = { @Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),
		@Filter(type = FilterType.CUSTOM, classes = AutoConfigurationExcludeFilter.class) })
public @interface SpringBootApplication {
   ...
}

package com.example.filter;

import org.springframework.context.annotation.TypeExcludeFilter;
import org.springframework.core.type.classreading.MetadataReader;
import org.springframework.core.type.classreading.MetadataReaderFactory;

public class MyTypeExcludeFilter extends TypeExcludeFilter {

    @Override
    public boolean match(MetadataReader metadataReader, MetadataReaderFactory metadataReaderFactory) throws IOException {
        String className = metadataReader.getClassMetadata().getClassName();
        // 根据需要设置排除逻辑，例如这里排除特定类。比如你还可以排除所有 Test开头、Demo开头这样的类。
        return className.startsWith("com.example.service.HelloService");
    }
}

package com.example.initializer;

import com.example.filter.MyTypeExcludeFilter;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ClassPathBeanDefinitionScanner;
import org.springframework.core.type.filter.TypeFilter;

public class MyTypeExcludeFilterInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

    @Override
    public void initialize(@NonNull ConfigurableApplicationContext applicationContext) {
        applicationContext.getBeanFactory().registerSingleton("myTypeExcludeFilter", new MyTypeExcludeFilter());
    }
}

org.springframework.context.ApplicationContextInitializer=\
com.example.initializer.MyTypeExcludeFilterInitializer