注意：此代码运行在IJ环境下，服务器是Tomcat。
功能：可以实现页面跳转
建工程：Demo01->建包：cn.first->建类：FirstServlet
FirstServlet类代码如下：
package cn.first; 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; /** * Created by Administrator on 2017/6/7 0007. */ public class FirstServlet extends HttpServlet { @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //System.out.println("doPost......"); doGet(req, resp); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { System.out.println("doGet......"); PrintWriter out = resp.getWriter(); out.println("<html><head><title></title></head><body>hello firstServlet!!!</a></body></html>"); out.flush(); out.close(); } } 配置web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <servlet> <servlet-name>FirstServlet</servlet-name> <servlet-class>cn.first.FirstServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>FirstServlet</servlet-name> <url-pattern>/First123</url-pattern> </servlet-mapping> </web-app> 配置index.jsp <%-- Created by IntelliJ IDEA. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title></title> </head> <body> <h><a href="/First123">点我！！</a></h> </body> </html>
