JSP第十三周作业
1.第十二周上机作业（邮件功能）的控制层代码改用为servlet实现。
2.学习通发布了考试，截止到5.27晚8点。
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>My JSP 'register.jsp' starting page</title> </head> <body> <script type="text/javascript"> function validate(){ if(registerForm.uname.value==""){ alert("账号不能为空!"); return; } if(registerForm.upwd.value==""){ alert("密码不能为空!"); return; } registerForm.submit(); } </script> <form name="registerForm" action="DoregServlet" method="post"> 用户名:<input type="text" name="uname"><br> 密 码: <input type="password" name="upwd"> <br> <input type="submit" value="注册" > <a href="denglu.jsp">登录</a> </form> </body></html> package com.servlet;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;import com.dao.UsersDao;public class servlet3 extends HttpServlet { public servlet3() { super(); } 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 { doPost (request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); UsersDao usersDao = new UsersDao(); int i=usersDao.reg(uname, upwd); if(i>0){ response.setHeader("refresh", "2;url=login.jsp"); }else{ response.setHeader("refresh", "2;url=reg.jsp"); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here }} package com.sf.servlet;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;import com.sf.dao.MsgDao;import com.sf.dao.UsersDao;public class Doregservlet extends HttpServlet { /** * Constructor of the object. */ public Doregservlet() { super(); } /** * Destruction of the servlet. <br> */ 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 { response.setContentType("text/html"); PrintWriter out = response.getWriter(); request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); UsersDao ud = new UsersDao(); MsgDao md = new MsgDao(); if (ud.register(uname, upwd) > 0) { request.getSession().setAttribute("uname", uname); request.getRequestDispatcher("denglu.jsp").forward(request, response); } else { out.print("注册失败，请重新注册......."); response.setHeader("refresh", "3;url=reg.jsp"); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here }} package com.servlet;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;import com.dao.MsgDao;public class servlet5 extends HttpServlet { public servlet5() { super(); } 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 { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); int id=Integer.parseInt(request.getParameter("id")); MsgDao md=new MsgDao(); md.delMail(id); response.getWriter().print("刪除成功....."); response.setHeader("refresh", "2;url=main.jsp"); response.sendRedirect("main2.jsp"); } public void init() throws ServletException { }} package com.sf.servlet;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;import com.sf.dao.MsgDao;import com.sf.entity.Msg;public class Dowriteservlet extends HttpServlet { /** * Constructor of the object. */ public Dowriteservlet() { super(); } /** * Destruction of the servlet. <br> */ 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 { response.setContentType("text/html"); PrintWriter out = response.getWriter(); request.setCharacterEncoding("utf-8"); String uname = (String) request.getSession().getAttribute("uname"); String sendto = request.getParameter("receiver"); String title = request.getParameter("title"); String content = request.getParameter("content"); Msg m = new Msg(); m.setMsgcontent(content); m.setUsername(uname); m.setSendto(sendto); m.setTitle(title); MsgDao md = new MsgDao(); md.addMsg(m); out.print("发送成功....."); response.setHeader("refresh", "3;url=main.jsp"); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { }}
