WebFilterInstaller.java 文件源码

private void configure(final ServletEnvironment environment, final Filter filter,
                       final String name, final WebFilter annotation) {
    final FilterRegistration.Dynamic mapping = environment.addFilter(name, filter);
    final EnumSet<DispatcherType> dispatcherTypes = EnumSet.copyOf(Arrays.asList(annotation.dispatcherTypes()));
    if (annotation.servletNames().length > 0) {
        mapping.addMappingForServletNames(dispatcherTypes, false, annotation.servletNames());
    } else {
        final String[] urlPatterns = annotation.urlPatterns().length > 0
                ? annotation.urlPatterns() : annotation.value();
        mapping.addMappingForUrlPatterns(dispatcherTypes, false, urlPatterns);
    }
    if (annotation.initParams().length > 0) {
        for (WebInitParam param : annotation.initParams()) {
            mapping.setInitParameter(param.name(), param.value());
        }
    }
    mapping.setAsyncSupported(annotation.asyncSupported());
}