Fun SpringBoot 2 rapid integration of Filter

Outline

SpringBoot no web.xml, we can not configure the Filter in web.xml according to the original way. But we can be configured by JavaConfig (@Configuration + @ Bean) mode. Filter to add custom SpringBoot filtered through a chain FilterRegistrationBean.

Combat operations

By defining a combat operation to intercept the URL Filter all access to the project to carry out presentation.

First define a unified access URL Filter blocked. code show as below:

public class UrlFilter implements Filter {
    private Logger log =  LoggerFactory.getLogger(UrlFilter.class);
 
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
    HttpServletRequest httpServletRequest = (HttpServletRequest) request;
        String requestURI = httpServletRequest.getRequestURI();
        StringBuffer requestURL = httpServletRequest.getRequestURL();
        log.info("requestURI:" +requestURI+" "+"requestURL:"+requestURL);
        chain.doFilter(httpServletRequest, response);
    }
 
}

Configuration chain based FilterRegistrationBean SpringBoot filtered through javaConfig embodiment, specific code as follows:

@Configuration
public class FilterConfig {
    @Bean
    public FilterRegistrationBean filterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new UrlFilter());
        List<String> urlList = new ArrayList<String>();
        urlList.add("/*");
        registration.setUrlPatterns(urlList);
        registration.setName("UrlFilter");
        registration.setOrder(1);
        return registration;
    }
}

FilterRegistrationBean method described in:

registration.setFilter (Filter filter): We set up a custom Filter objects.

registration.setUrlPatterns(Collection urlPatterns): Set Custom Collection URL Filter needs of interception.

registration.setName (String name): Set Custom Filter name.

registration.setOrder (int order): set a custom order intercept Filter.

test

Start SpirngBoot project and access the index.html under our project through the tour is.