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  • 02-02:springboot 整合filter

    1.通过注解扫描完成Filter组件的注册

      1.1编写filter (添加拦截的servlet)

    //@WebFilter(filterName = "FirstFilter",urlPatterns = {"*.do","*.jsp"})
    @WebFilter(filterName = "FirstFilter",urlPatterns = "/first") 
    public class FirstFilter implements Filter{
    
        @Override
        public void init(FilterConfig filterConfig) throws ServletException {
            // TODO Auto-generated method stub
            
        }
    
        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            // TODO Auto-generated method stub
            System.out.println("进入filter");
            chain.doFilter(request, response);
            System.out.println("离开filter");
        }
    
        @Override
        public void destroy() {
            // TODO Auto-generated method stub
            
        }
    
    }

      1.2 添加启动器

    /**
     * springboot 整合filter方式一
     * 
     * @author Administrator
     */
    @SpringBootApplication
    @ServletComponentScan
    public class App {
        public static void main(String[] args) {
            SpringApplication.run(App.class, args);
        }
    }

    2.通过方法完成filter组件的注册

    2.1编写filter

    public class secondFilter implements Filter{
    
        @Override
        public void init(FilterConfig filterConfig) throws ServletException {
            // TODO Auto-generated method stub
            
        }
    
        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            // TODO Auto-generated method stub
            System.out.println("进入secondFilter");
            chain.doFilter(request, response);
            System.out.println("离开secondFilter");
        }
    
        @Override
        public void destroy() {
            // TODO Auto-generated method stub
            
        }
    
    }

    2.2 编写启动类

    /**
     * springboot整合filter方式2
     * 
     * @author Administrator
     *
     */
    @SpringBootApplication
    public class App2 {
        public static void main(String[] args) {
            SpringApplication.run(App2.class, args);
        }
        /**
         * 注册servlet
         * @return
         */
        @Bean
        public ServletRegistrationBean  getServletRegistrationBean () {
            ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet());
            bean.addUrlMappings("/second");
            return bean;
        }
        /**
         * 注册Filter
         * @return
         */
        @Bean
        public FilterRegistrationBean  getFilterRegistrationBean() {
            FilterRegistrationBean bean = new  FilterRegistrationBean (new secondFilter());
    //        bean.addUrlPatterns(new String[] {"*.do","*.jsp"});
            bean.addUrlPatterns("/second");
            return bean;
        }
    }
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  • 原文地址:https://www.cnblogs.com/wangjianly/p/9794167.html
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