Filter springboot中

一、自定义注解
/**
 * 自定义filter
 * 编写一个类，实现javax.servlet.Filter  添加component注解，添加webfilter注解
 * 通过@WebFilter注解对filter进行配置
 */
@Component
@WebFilter
public class MyFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        //filter的初始化方法，可以执行初始化操作
        System.out.println("myfilter init");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {
        //销毁
    }
}

二、引入其他filter（别人编写的，因为不能加component注解，所以需要加入到容器中）

@Configuration
public class filterconfig {

    @Bean
    public FilterRegistrationBean filterRegistrationBean(){
        FilterRegistrationBean<Filter> filterFilterRegistrationBean = new FilterRegistrationBean<>();
        MyFilter myFilter1 = new MyFilter();
        filterFilterRegistrationBean.addUrlPatterns("/myfilter");
        filterFilterRegistrationBean.setFilter(myFilter1);
        filterFilterRegistrationBean.setOrder(1);
return filterFilterRegistrationBean;
    }
    @Bean
    public FilterRegistrationBean filterRegistrationBean2(){
        FilterRegistrationBean<Filter> filterFilterRegistrationBean2 = new FilterRegistrationBean<>();
        MyFilter2 myFilter2 = new MyFilter2();
        filterFilterRegistrationBean2.addUrlPatterns("/myfilter");
        filterFilterRegistrationBean2.setFilter(myFilter2);
        filterFilterRegistrationBean2.setOrder(2);
        return filterFilterRegistrationBean2;
    }