Spring Boot - 为什么使用 Tiles+JSP 时在单个请求中多次调用 MyFilter？

Question

给定此过滤器：

public class MyFilter implements Filter{

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        System.out.println("FILTERING!!!!!!!!!!!!!!!!!!!"+((HttpServletRequest)request).getRequestURI());
        chain.doFilter(request, response);
    }

我看到它在同一个请求中被多次调用

Spring 启动应用程序：

@SpringBootApplication(scanBasePackageClasses={MySpringBootDemoApplication .class, TilesConfiguration.class})
public class MySpringBootDemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(MySpringBootDemoApplication .class, args);
    }

    @Bean
    public Filter myFilter(){
        return new MyFilter();
    }
}

瓷砖配置：

@Configuration
public class TilesConfiguration {

     @Bean
     public TilesConfigurer tilesConfigurer() {
         final TilesConfigurer configurer = new TilesConfigurer();
         configurer.setDefinitions(new String[] { "WEB-INF/**/tiles.xml" });
         configurer.setCheckRefresh(true);
         return configurer;
     }

     @Bean
     public TilesViewResolver tilesViewResolver() {
         final TilesViewResolver resolver = new TilesViewResolver();
         resolver.setViewClass(TilesView.class);
         return resolver;
     }

}

这是我在日志中看到的：

FILTERING!!!!!!!!!!!!!!!!!!!/spring-boot-demo/home
FILTERING!!!!!!!!!!!!!!!!!!!/spring-boot-demo/WEB-INF/layouts/standard.jsp
FILTERING!!!!!!!!!!!!!!!!!!!/spring-boot-demo/WEB-INF/layouts/standard.jsp
FILTERING!!!!!!!!!!!!!!!!!!!/spring-boot-demo/WEB-INF/layouts/standard.jsp

浏览器发出的唯一真实请求是：

FILTERING!!!!!!!!!!!!!!!!!!!/spring-boot-demo/home

与(/standard.jsp)相关的图块从何而来？在传统的 Spring MVC 应用程序中，它们从未出现过。

我知道 MyFilter 可以扩展 OncePerRequestFilter，但我无法修改我必须使用的真实过滤器，它们来自遗留库。

Answer 1

我刚刚意识到，由于 MyFilter 是针对 /* 映射的，它也会在容器转发时被调用（因此 Tile 的 standard.jsp...）。我更改了 DispatcherServlet 以匹配 /action/*，过滤器也是如此：

@Bean
public FilterRegistrationBean myFilter(){
    FilterRegistrationBean frb = new FilterRegistrationBean();
    frb.setFilter(new MyFilter());
    frb.setUrlPatterns(Arrays.asList(new String[]{"/action/*"}));
    return frb;

@Bean
public ServletRegistrationBean dispatcherRegistration(DispatcherServlet dispatcherServlet) {
    ServletRegistrationBean registration = new ServletRegistrationBean(dispatcherServlet);
    registration.addUrlMappings("/action/*");
    return registration;
}

Spring Boot - 为什么使用 Tiles+JSP 时在单个请求中多次调用 MyFilter？

Spring Boot - Why is MyFilter called many times in a single request when using Tiles+JSP?

spring

tiles

spring-mvc

tiles-3

spring-boot