Spring Boot中ComponentScan的exclude

在SpringBoot的组件自动扫描加载中怎么样去exclude classes/packages呢？我们可以使用@ComponentScan的excludeFilters来实现。

实现方法一

ExcludedService.java

package cn.webfuse.service.exclude;

import org.springframework.stereotype.Service;

@Service
public class ExcludedService {

    public ExcludedService() {
        System.out.println("Instantiating " + getClass().getSimpleName());
    }
}

IncludedService.java

package cn.webfuse.service.include;

import org.springframework.stereotype.Service;

@Service
public class IncludedService {

    public IncludedService() {
        System.out.println("Instantiating " + getClass().getSimpleName());
    }
}

Application.java

@SpringBootApplication
@ComponentScan(
        excludeFilters = @ComponentScan.Filter(
                type = FilterType.REGEX,
                pattern = "cn.webfuse.service.exclude.*"))
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

运行只得到IncludedService的打印。

实现方法二

IgnoreDuringScan.java

package cn.webfuse.annotation;

public @interface IgnoreDuringScan {
}

ExcludedConfig.java

package cn.webfuse.config.exclude;

import cn.webfuse.annotation.IgnoreDuringScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@IgnoreDuringScan
public class ExcludedConfig {

    public ExcludedConfig() {
        System.out.println("Instantiating " + getClass().getSimpleName());
    }
}

IncludedConfig.java

package cn.webfuse.config.include;

import org.springframework.context.annotation.Configuration;

@Configuration
public class IncludedConfig {
    public IncludedConfig() {
        System.out.println("Instantiating " + getClass().getSimpleName());
    }
}

Application.java

@SpringBootApplication
@ComponentScan(excludeFilters = @ComponentScan.Filter(IgnoreDuringScan.class))
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}