Spring Boot自動添加了OrderedCharacterEncodingFilter和HiddenHttpMethodFilter，直接自定義Filter。

步驟:

1.實現Filter接口，實現Filter方法

2.添加@Configuration 註解，將自定義Filter加入過濾鏈

自定義的filter類:

@Configuration
public class WebConfiguration {
    @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 destroy() {
            // TODO Auto-generated method stub
        }

        @Override
        public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain)
                
 
throws IOException, ServletException {
            // TODO Auto-generated method stub
            HttpServletRequest request = (HttpServletRequest) srequest;
            System.out.println("this is MyFilter,url :" + request.getRequestURI());
            filterChain.doFilter(srequest, sresponse);
        }

        @Override
        public void init(FilterConfig arg0) throws ServletException {
            // TODO Auto-generated method stub
        }
    }
}

springboot初步認識---自定義filter