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。