How to integrate Filter in SpringBoot2

First define a Filter for unified access 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 through javaConfig. The specific code is 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;
  }
}</string></string>

FilterRegistrationBean method introduction:

• registration.setFilter(Filter filter): Set our custom Filter object.

• registration.setUrlPatterns(Collection urlPatterns): Set the collection of URLs that the custom Filter needs to intercept.

• registration.setName(String name): Set the custom Filter name.

• registration.setOrder(int order): Set the custom Filter interception order.

Test

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

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