Servlet初识-HelloServlet

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1、HelloServlet.java

import java.io.IOException;import javax.servlet.Servlet;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.ServletRequest;import javax.servlet.ServletResponse;public class HelloServlet implements Servlet{@Overridepublic void destroy() {System.out.println("destroy");}@Overridepublic ServletConfig getServletConfig() {System.out.println("getServletConfig");return null;}@Overridepublic String getServletInfo() {System.out.println("getServletInfo");return null;}@Overridepublic void init(ServletConfig arg0) throws ServletException {System.out.println("init");}@Overridepublic void service(ServletRequest arg0, ServletResponse arg1) throws ServletException, IOException {System.out.println("service");}public HelloServlet() {System.out.println("constructor");}}

2、web.xml

起别名，映射到url，可以与python的Django对比

 <servlet>  <servlet-name>HelloWorld</servlet-name>  <servlet-class>third.HelloServlet</servlet-class>  </servlet>  <servlet-mapping>  <servlet-name>HelloWorld</servlet-name>  <url-pattern>/guoguo</url-pattern>  </servlet-mapping>

3、访问路径

http://localhost:8080/guoguo

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