42.原生组件注入-原生注解与Spring方式注入
使用原生的注解
@WebServlet(urlPatterns = "/my")
public class MyServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.getWriter().write("66666");
}
}
@Slf4j
@WebFilter(urlPatterns={"/css/*","/images/*"}) //my
public class MyFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
log.info("MyFilter初始化完成");
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
log.info("MyFilter工作");
chain.doFilter(request,response);
}
@Override
public void destroy() {
log.info("MyFilter销毁");
}
}
@Slf4j
@WebListener
public class MyServletContextListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
log.info("MySwervletContextListener监听到项目初始化完成");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
log.info("MySwervletContextListener监听到项目销毁");
}
}
最后还要在主启动类添加注解@ServletComponentScan
@ServletComponentScan(basePackages = "com.lun")//
@SpringBootApplication(exclude = RedisAutoConfiguration.class)
public class Boot05WebAdminApplication {
public static void main(String[] args) {
SpringApplication.run(Boot05WebAdminApplication.class, args);
}
}
Spring方式注入
ServletRegistrationBean, FilterRegistrationBean, and ServletListenerRegistrationBean
@Configuration(proxyBeanMethods = true)
public class MyRegistConfig {
@Bean
public ServletRegistrationBean myServlet(){
MyServlet myServlet = new MyServlet();
return new ServletRegistrationBean(myServlet,"/my","/my02");
}
@Bean
public FilterRegistrationBean myFilter(){
MyFilter myFilter = new MyFilter();
// return new FilterRegistrationBean(myFilter,myServlet());
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(myFilter);
filterRegistrationBean.setUrlPatterns(Arrays.asList("/my","/css/*"));
return filterRegistrationBean;
}
@Bean
public ServletListenerRegistrationBean myListener(){
MySwervletContextListener mySwervletContextListener = new MySwervletContextListener();
return new ServletListenerRegistrationBean(mySwervletContextListener);
}
}