SpringBoot自定义Filter

SpringBoot自定义Filter

SpringBoot自动添加了OrderedCharacterEncodingFilter和HiddenHttpMethodFilter，当然我们可以自定

义Filter。

自定义Filter需要两个步骤：

【过滤打印请求URL】实例代码如下：

package xatu.zsl.Filter;



import org.apache.catalina.filters.RemoteIpFilter;


import org.springframework.boot.web.servlet.FilterRegistrationBean;


import org.springframework.context.annotation.Bean;


import org.springframework.context.annotation.Configuration;



import javax.servlet.*;


import javax.servlet.http.HttpServletRequest;


import java.io.IOException;



/**


 * Created by zsl on 2017/9/3.


 */


@Configuration


public class ConfigurationFilter {


    @Bean


    public RemoteIpFilter remoteIpFilter() {


        return new RemoteIpFilter();


    }



    @Bean


    public FilterRegistrationBean testFilterRegistration() {


        FilterRegistrationBean registration = new FilterRegistrationBean();


        registration.setFilter(new MyFilter());//添加过滤器


        registration.addUrlPatterns("/*");//设置过滤路径，/*所有路径


        registration.addInitParameter("name", "alue");//添加默认参数


        registration.setName("MyFilter");//设置优先级


        registration.setOrder(1);//设置优先级


        return registration;


    }



    public class MyFilter implements Filter {


        @Override


        public void destroy() {


        }



        @Override


        public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain

                filterChain)



                throws IOException, ServletException {

            HttpServletRequest request = (HttpServletRequest) srequest;


            //打印请求Url


            System.out.println("this is MyFilter,url :" + request.getRequestURI());


            filterChain.doFilter(srequest, sresponse);


        }



        @Override


        public void init(FilterConfig arg0) throws ServletException {


        }


    }


}

SpringBoot自定义Filter-LMLPHP

有人好奇public FilterRegistrationBean testFilterRegistration() 这个方法返回的FilterRegistrationBean如何在Coltroller中获取？，(●’◡’●)，我很好奇，，于是乎！搞了点事情

在Controller中获取刚才ConfigurationFilter中【registration.addInitParameter(“name”, “alue”);//添加默认参数】这个设置的参数。

在Controller中加入如下代码就能获取（刚才【testFilterRegistration()】方法加了注解@Bean，所以Spring容器中会有一个实例， @Autowired就理所应当的注入进来了。）

    @Autowired


    FilterRegistrationBean registration;



    @GetMapping("/getname")


    public Map<String, String> getName() {


        Map<String, String> initParameters = registration.getInitParameters();


        return initParameters;


    }

SpringBoot自定义Filter-LMLPHP