三、Springboot学习2-过滤器实现-2018-11-13

版权声明：kanghu https://blog.csdn.net/weixin_40739280/article/details/84029486

1. 自定义filter,实现步骤：

    1. 实现Filter接口，实现filter方法

    2. 添加@Configuration注解，将自定义Filter加入过滤链

    代码如下：

@Configuration
public class WebConfiguration {

    private final static Log log = LogFactory.getLog(WebConfiguration.class);

    @Bean
    public RemoteIpFilter remoteIpFilter() {
        return new RemoteIpFilter();
    }

    @Bean
    public FilterRegistrationBean testFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new Myfilter());
        registration.addUrlPatterns("/*");
        registration.addInitParameter("paramName","paramValue");
        registration.setName("MyFilter");
        registration.setOrder(1);
        return  registration;
    }

    public class Myfilter implements Filter {

        @Override
        public void init(FilterConfig filterConfig) throws ServletException {

        }

        @Override
        public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
            HttpServletRequest request = (HttpServletRequest)servletRequest;
            log.info("----WebConfiguration----doFilter----url: "+request.getRequestURI());
            filterChain.doFilter(servletRequest,servletResponse);
        }

        @Override
        public void destroy() {

        }
    }

}