在Spring Boot中设置了HandlerInterceptor，发现对于js、css等文件都没有起作用。
定义一个HandlerInterceptor
public class FooInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
System.out.println("foo");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
}
}
将HandlerInterceptor匹配到所有路径
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new FooInterceptor())
.addPathPatterns("/**");
}
}
这时虽然PathPatterns设置了“/**”，但是发现FooInterceptor对静态资源没有起作用。这时看看addInterceptors方法上的注释。
Add Spring MVC lifecycle interceptors for pre- and post-processing of controller method invocations. Interceptors can be registered to apply to all requests or be limited to a subset of URL patterns.
Note that interceptors registered here only apply to controllers and not to resource handler requests. To intercept requests for static resources either declare a MappedInterceptor bean or switch to advanced configuration mode by extending WebMvcConfigurationSupport and then override resourceHandlerMapping.
说明它只对controller起作用，如果想对静态资源起作用，简单的方法是添加一个MappedInterceptor bean。
@Configuration
public class WebConfig {
@Bean
public MappedInterceptor getMappedInterceptor() {
return new MappedInterceptor(new String[] { "/**" }, new FooInterceptor());
}
}
