SpringBoot自動(dòng)添加了OrderedCharacterEncodingFilter和HiddenHttpMethodFilter，當(dāng)然我們可以自定義Filter。

自定義Filter需要兩個(gè)步驟：

實(shí)現(xiàn)Filter【javax.servlet.Filter】接口，實(shí)現(xiàn)Filter方法

添加 @Configuration 注解，將自定義Filter加入過濾鏈

【過濾打印請(qǐng)求URL】實(shí)例代碼如下：

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());//添加過濾器
        registration.addUrlPatterns("/*");//設(shè)置過濾路徑，/*所有路徑
        registration.addInitParameter("name", "alue");//添加默認(rèn)參數(shù)
        registration.setName("MyFilter");//設(shè)置優(yōu)先級(jí)
        registration.setOrder(1);//設(shè)置優(yōu)先級(jí)
        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;
            //打印請(qǐng)求Url
            System.out.println("this is MyFilter,url :" + request.getRequestURI());
            filterChain.doFilter(srequest, sresponse);
        }
        @Override
        public void init(FilterConfig arg0) throws ServletException {
        }
    }
}

在Controller中獲取剛才ConfigurationFilter中【registration.addInitParameter(“name”, “alue”);//添加默認(rèn)參數(shù)】這個(gè)設(shè)置的參數(shù)。

在Controller中加入如下代碼就能獲取(剛才【testFilterRegistration()】方法加了注解@Bean，所以Spring容器中會(huì)有一個(gè)實(shí)例， @Autowired就理所應(yīng)當(dāng)?shù)淖⑷脒M(jìn)來了。)

    @Autowired
    FilterRegistrationBean registration;
    @GetMapping("/getname")
    public Map<String, String> getName() {
        Map<String, String> initParameters = registration.getInitParameters();
        return initParameters;
    }

以上就是關(guān)于“用SpringBoot自定義Filter的方法”的介紹，如果大家比較感興趣，想了解更多相關(guān)知識(shí)，可以關(guān)注一下動(dòng)力節(jié)點(diǎn)的Filter教程，課程內(nèi)容詳細(xì)，適合小白學(xué)習(xí)，相信對(duì)大家的學(xué)習(xí)會(huì)有所幫助。