1、概述

springboot工程中使用Filter过滤器与其他地方使用基本相同，只是注入的方式不同。

2、创建Filter过滤器

实现Filter接口，重写doFilter方法

filterChain.doFilter(servletRequest,servletResponse);表示放行

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 {
        System.out.println("=======过滤器执行========");
        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {

    }
}

3、向容器中注册自定义的Filter

@Configuration
public class MyServerConfig {

    //注册三大组件--Filter
    @Bean
    public FilterRegistrationBean myFilter(){
        FilterRegistrationBean filter=new FilterRegistrationBean();
        filter.setFilter(new MyFilter());
        filter.setUrlPatterns(Arrays.asList("/getUser","/myservlet"));
        return filter;
    }


}

4、测试结果