前情回顾

Myeclipse的安装教程_科大云炬的博客-CSDN博客

【JavaWeb第1次上机练习】安装Tomcat并在本地浏览器成功运行第一个Hello world网站_科大云炬的博客-CSDN博客

【第2次JavaWeb上机练习】_科大云炬的博客-CSDN博客

第3次 JavaWeb上机练习：Servlet基础作业_科大云炬的博客-CSDN博客

第4次JavaWeb上机练习——ServletConfig接口的常用方法_科大云炬的博客-CSDN博客

Javaweb第5次上机练习（获取HTTP的请求参数）_科大云炬的博客-CSDN博客

上机实操

1在src目录新建名为ServletCkde的servlet

功能：从前端form表单接收post请求中的参数，并传递给后端的jsp脚本提示欢迎信息

package com.zr;import java.io.IOException;
import java.io.PrintWriter;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class ServletCkde extends HttpServlet {public ServletCkde() {super();}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {//指定浏览器汉字的编码格式response.setContentType("text/html；charset=utf-8");//指定服务器的汉字编码格式request.setCharacterEncoding("utf-8");//1.获取表单中提交的名字String usernameString =request.getParameter("username");String passwordString =request.getParameter("password");//2.跳转到注册成功页面,并且把请求响应参数传递过去//3.通过request域把获取到的表单数据写入request域中,并通过getRequestDispatcher,//指定传递页面,通过forward传递参数出去request.setAttribute("name",usernameString);request.setAttribute("pwd",passwordString);request.getRequestDispatcher("/loginok.jsp").forward(request,response);}public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {}/*** Initialization of the servlet. 
** @throws ServletException if an error occurs*/public void init() throws ServletException {// Put your code here}}

2在WebRoot目录新建login.html

功能：前端交互页面，接收用户输入的用户名、密码信息

注：在from的action中填写ServletCkde的请求地址（包含项目名+路由地址）



姓名：
密码：

运行一下页面效果

3在WebRoot目录新建loginok.jsp

功能：从servlet的接收用户名和密码并提示欢迎信息，并在五秒后跳转到index.jsp首页

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%String strname=(String)request.getAttribute("name");String strpwd=(String)request.getAttribute("pwd");%><%response.setHeader("refresh","2；ur1=/Webbk/index.jsp");%>欢迎你：<%=strname%>你已成功登录,请牢记您的密码<%=strpwd%>三秒后跳转到首页
秒后跳转到首页,如没有跳转你可以点击首页〈/a>跳转到首页

4在WebRoot目录新建index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
">My JSP 'index.jsp' starting page    这是首页