传统 Servlet 应用

Servlet 组件：Servlet、Filter、Listener

• Servlet
  实现：@WebServlet
  URL 映射：@WebServlet(urlPatterns = "/my/servlet")
  注册：@ServletComponentScan(basePackages = “com.purejoy.test.servlet”)

Servlet 注册：Servlet注解、Spring Bean、RegistrationBean

• Spring Bean
  @Bean
• RegistrationBean
  ServletRegistrationBean
  FilterRegistrationBean
  ServletListenerRegistrationBean

异步非阻塞：异步 Servlet、非阻塞 Servlet

• 异步 Servlet
  javax.servlet.ServletRequest#startAsync()
  javax.servlet.AsyncContext
• 非阻塞 Servlet
  javax.servlet.ServletInputStream#setReadListener
  javax.servlet.ReadListener
  javax.servlet.ServletOutputStream#setWriteListener
  javax.servlet.WriteListener