Servlet 01 ----【javaweb-04】
SERVLET
什么是Servlet?
Servlet(Server Applet)是Java Servlet的简称,称为小服务程序或服务连接器,用Java编写的服务器端程序,具有独立于平台和协议的特性,主要功能在于交互式地浏览和生成数据,生成动态Web内容。
---- 源自百度百科https://baike.baidu.com/item/Servlet/477555
初步使用Servlet
doGet和doPost只需要写一个就够了,另一个继承即可。
package com.charles.servlet; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; public class HelloServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("doPost执行"); PrintWriter writer = resp.getWriter(); // 响应流 writer.print("Hello,Servlet"); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } }
运行结果(这里已经提前配置好了Tomcat):