spring boot 配置Filter過濾器

1、通過 @WebFilter 註解來配置

@Component
@WebFilter(urlPatterns = "/webapi/*", filterName = "authFilter")
public class AuthFilter implements Filter {
    ......
}

2、通過 @Bean 註解來配置

我這個是寫在帶 @SpringBootApplication 註解的類裡面的。

	@Bean
	public FilterRegistrationBean testFilterRegistration() {
		FilterRegistrationBean registration = new FilterRegistrationBean(new TestFilter());
		registration.addUrlPatterns("/webapi/*"); //
		registration.addInitParameter("paramName", "paramValue"); //
		registration.setName("testFilter");
		return registration;
	}
 

那如果有多個過慮器，怎麼指定執行的順序呢？

通過 registration.setOrder(1);  來設定，例如：

	@Bean
	public FilterRegistrationBean testFilterRegistration() {
		FilterRegistrationBean registration = new FilterRegistrationBean(new TestFilter());
		registration.addUrlPatterns("/webapi/*"); //
		registration.addInitParameter("paramName", "paramValue"); //
		registration.setName("testFilter");
		registration.setOrder(1);
		return registration;
	}

	@Bean
	public FilterRegistrationBean authFilterRegistration() {
		FilterRegistrationBean registration = new FilterRegistrationBean(new AuthFilter());
		registration.addUrlPatterns("/webapi/*"); //
		registration.addInitParameter("paramName", "paramValue"); //
		registration.setName("authFilter");
		registration.setOrder(2);
		return registration;
	}
 

注意：

1、如果指定了 Order 屬性，執行的順序與註冊的順序是無關的；

2、數字越小，優先順序越高；

關於 @Order 註解

有文章提到使用 @Order 註解來指定順序，親測無效。