springboot--Servlet、Filter、Listener配置

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本文详细介绍了SpringBoot中Bean的三种注册方式：FilterRegistrationBean、ServletRegistrationBean和ServletListenerRegistrationBean，分别用于配置原生的Filter、Servlet和Listener。通过示例代码展示了如何使用这三种Bean进行具体配置。

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SpringBoot提供了三种Bean

FilterRegistrationBean、ServletRegistrationBean、ServletListenerRegistrationBean
分别对应配置原生的Filter、Servlet、Listener

@Bean
    public ServletRegistrationBean indexServletRegistration() {
        ServletRegistrationBean registration = new ServletRegistrationBean(new IndexServlet());
        registration.addUrlMappings("/hello");
        return registration;
    }

    @Bean
    public FilterRegistrationBean indexFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean(new IndexFilter());
        registerBean.setName("indexFilter");
        registerBean.addInitParameter("encoding", "UTF-8");
        registration.addUrlPatterns("/*");
        registerBean.setOrder(0);
        return registration;
    }
    @Bean
    public ServletListenerRegistrationBean servletListenerRegistrationBean(){
        ServletListenerRegistrationBean servletListenerRegistrationBean = new ServletListenerRegistrationBean();
        servletListenerRegistrationBean.setListener(new IndexListener());
        return servletListenerRegistrationBean;
    }