自定义DelegatingFilterProxy

/**
 * @author cuishiying
 * @date 2021-01-22
 */
@Configuration
public class WebConfig {

    @Bean
    public Filter tokenAuthFilter() {
        return new TokenAuthFilter();
    }
    /** * 注册filter，统一处理api开头的请求 * @return FilterRegistrationBean */
    @Bean
    public FilterRegistrationBean tokenAuthFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        // DelegatingFilterProxy把servlet 容器中的filter同spring容器中的bean关联起来, spring会去查找tokenAuthFilter的filter
        registration.setFilter(new DelegatingFilterProxy("tokenAuthFilter"));
        registration.addUrlPatterns("/*");
        registration.setName("tokenAuthFilter");
        registration.setOrder(1);
        return registration;
    }

}

/**
 * @author cuishiying
 * @date 2021-01-22
 */
public class TokenAuthFilter implements Filter {

    public TokenAuthFilter() {
        System.out.println("myFilter");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("filter...");
        filterChain.doFilter(servletRequest, servletResponse);
    }
}

springboot程序启动即可自动调用TokenAuthFilter