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How to analyze the process of SpringBoot2 rapid integration of Filter, in view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Overview

There is no web.xml in SpringBoot, so we cannot configure Filter in web.xml in the original way. But we can configure it through JavaConfig (@ Configuration + @ Bean). Add a custom Filter to the filter chain of SpringBoot through FilterRegistrationBean.

Actual combat operation

The actual operation is demonstrated by defining a Filter that intercepts all URL that accesses the project.

First define a Filter that uniformly accesses URL interception. The code is as follows:

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);}}

Configure the SpringBoot filter chain class FilterRegistrationBean by javaConfig, as shown in the following code:

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

Introduction to the methods in FilterRegistrationBean:

Registration.setFilter (Filter filter): set up our custom Filter object. Registration.setUrlPatterns (Collection urlPatterns): sets the collection of URL that a custom Filter needs to intercept. Registration.setName (String name): sets the custom Filter name. Registration.setOrder (int order): sets the custom Filter intercept order.

test

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

This is the answer to the question on how to analyze SpringBoot2's rapid integration of Filter. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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