在使用@Webfilter註解Filter的情況下,不上外部tomcat時是沒有問題的。但是在tomcat下執行時，filter中注入的bean就都是null

解決辦法：

一：去掉@Webfilter註解

public class GeneralFilter implements Filter {

    
    @Autowired
    private SettingRemote settingRemote; //注入
    
    ....

}

 二： 新增一個配置類,用來手工建立filter的bean

@Configuration
 
public class WebMvcConfig implements WebMvcConfigurer {

    @Bean
    public Filter generalFilter() {
        return new GeneralFilter();
    }

    @Bean
    public FilterRegistrationBean uploadFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(
 
new DelegatingFilterProxy("generalFilter"));
        registration.addUrlPatterns("/*");
        registration.setName("generalFilter");
        registration.setOrder(1);
        return registration;
    }
}

之後注入的業務bean就不會是null