使用@ConditionalOnProperty控制是否加载的操作

public interface OSService {
	void os();
}
 
@ConditionalOnProperty(prefix = "custom.os", name = "name", havingValue = "linux")
@Service("osService")
public class LinuxService implements OSService {
	
	@Override
	public void os() {
		System.out.println("Now OS is Linux!");
	}
}
 
@ConditionalOnProperty(prefix = "custom.os", name = "name", havingValue = "windows")
@Service("osService")
public class WindowsService implements OSService {
	@Override
	public void os() {
		System.out.println("Now OS is Windows!");
	}
}
 
@RequestMapping(path = "test")
@RestController
public class TempRestController {
 
	@Autowired
	OSService osService;
	@PostMapping(path = "condition")
	public void condition() {
		osService.os();
	}
}

custom:
   os:
      name: linux

@Configuration
@ConditionalOnProperty(prefix = "filter",name = "loginFilter",havingValue = "true")
public class FilterConfig {
 //prefix为配置文件中的前缀,
 //name为配置的名字
 //havingValue是与配置的值对比值,当两个值相同返回true,配置类生效.
    @Bean
    public FilterRegistrationBean getFilterRegistration() {
        FilterRegistrationBean filterRegistration  = new FilterRegistrationBean(new LoginFilter());
        filterRegistration.addUrlPatterns("/*");
        return filterRegistration;
    }
}

filter.loginFilter=true