在spring boot 配置servlet filter 逻辑上与配置spring 是一样的。 不过相比spring 更加简化配置的难度。 这里只需要两步
1 创建一个自定义顾虑器并继承spring filter 例如OncePerRequestFilter
public class AuthenticationFilter extends OncePerRequestFilter{ private final Logger logger=LoggerFactory.getLogger(this.getClass()); @Override protected void doFilterInternal(HttpServletRequest req, HttpServletResponse resp, FilterChain chain) throws ServletException, IOException { //code for filtering chain.doFilter(req, resp); } }
注: 这里我使用的是OncePerRequestFilter,目的是为了保证每次request 只触发一次filter
2 在spring boot配置filter。 相当于在web.xml 配置<filter></filter> 和filter mapping url pattern
@Configurationpublic class StarsFilterConfiguration { /*FilterRegistrationBean 用来配置urlpattern 来确定哪些路径触发filter */ @Bean public FilterRegistrationBean someFilterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(AuthFilter()); registration.addUrlPatterns("/api/rest/*"); registration.setOrder(1); return registration; } /*使用annotation tag来取代*/ @Bean() public Filter AuthFilter() { return new AuthenticationFilter(); }}