在spring boot 配置servlet filter 邏輯上與配置spring 是一樣的。 不過相比spring 更加簡化配置的難度。 這裏只需要兩步
1 創建一個自定義顧慮器並繼承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： 這裏我使用的是OncePerRequestFilter，目的是爲了保證每次request 只觸發一次filter
2 在spring boot配置filter。 相當於在web.xml 配置<filter></filter> 和filter mapping url pattern
@Configuration
public class StarsFilterConfiguration {
/*FilterRegistrationBean 用來配置urlpattern 來確定哪些路徑觸發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來取代<bean></bean>*/
@Bean()
public Filter AuthFilter() {
return new AuthenticationFilter();
}
}