Servlet 注册与提交作业
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>登录页</title> <script type="text/javascript"> function check() { var uid = document.getElementById("userid"); if (uid.value == "") { alert("用户代码不能为空"); return false; } if(uform.password.value == "") { alert("密码不能为空"); return false; } return true; } </script> </head> <body> <form id="uform" action="yanzheng" method ="post" onsubmit="return check()"> 用户：<input id="userid" type="text" name="userid" width="30" /> 密码：<input id="password" type="password" name="password" width="30"/> <input type="submit" value="登录"> <a href="zhuce.html">注册新用户</a> </form> </body> </html>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Strict//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <script type="text/javascript"> //在本页面对注册信息进行验证，使之不能为空 function check() { var uid = document.getElementById("userid"); if (uid.value == "") { alert("用户代码不能为空"); return false; } if(uform.usermingc.value == "") { alert("用户名称不能为空"); return false; } if(uform.password.value == "") { alert("密码不能为空"); return false; } if(uform.quer.value != uform.password.value) { alert("登录密码和确认密码不一致"); return false; } return true; } </script> </head> <body> <form id="uform" action ="saveUser" onsubmit="return check()" > 用户代码：<input id="userid" type="text" name="userid" width=30 > <br><br> 用户名称：<input id="usermingc" type="text" name="username" width=30> <br><br> 登录密码：<input id="password" type="password" name="password" width=30> <br><br> 确认密码：<input id="quer" type="password" name="queren" width=30> <br><br> <input type="submit" value="提交"> </form> </body> </html>
package com.hanqi; import java.io.IOException; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.hanqi.*; /** * Servlet implementation class saveUser */ public class saveUser extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public saveUser() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("GBK"); String strUserid = request.getParameter("userid"); String strUsername = request.getParameter("username"); String strPW = request.getParameter("password"); if(strUserid == null ||strUserid.trim().length() == 0) { response.getWriter().append("账户不能为空"); response.setHeader("refresh","3;URL=login.html"); } else if(strUsername == null ||strUsername.trim().length() == 0) { response.getWriter().append("用户名不能为空"); response.setHeader("refresh","3;URL=login.html"); } else if(strPW == null ||strPW.trim().length() == 0) { response.getWriter().append("密码不能为空"); response.setHeader("refresh","3;URL=login.html"); } else{ ServletContext application = this.getServletContext(); Object obj = application.getAttribute(strUserid); if( obj != null) { response.getWriter().append("该用户已存在"); response.setHeader("refresh","3;URL=login.html"); } else { strUsername = new String(strUsername.getBytes("ISO-8859-1"),"UTF-8"); User user = new User(); user.setUserID(strUserid); user.setUserName(strUsername); user.setPassword(strPW); application.setAttribute(strUserid, user); response.getWriter().append("注册成功"); response.setHeader("refresh","3;URL=login.html"); } } response.getWriter().append("Served at: saveUser").append(request.getContextPath()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package com.hanqi; import java.io.IOException; import javax.servlet.ServletConfig; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.hanqi.*; /** * Servlet implementation class yanzheng */ public class yanzheng extends HttpServlet { private static final long serialVersionUID = 1L; String strType = ""; /** * @see HttpServlet#HttpServlet() */ public yanzheng() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse * response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("GBK"); String strUserid = request.getParameter("userid"); String strPW = request.getParameter("password"); if (strUserid == null || strUserid.trim().length() == 0) { response.getWriter().append("账户不能为空"); response.setHeader("refresh", "3;URL=login.html"); } else if (strPW == null || strPW.trim().length() == 0) { response.getWriter().append("密码不能为空"); response.setHeader("refresh", "3;URL=login.html"); } else { ServletContext application = this.getServletContext(); Object obj = application.getAttribute(strUserid); if (obj != null) { User user = (User) obj; String strUID = user.getUserID(); String strUsername = user.getUserName(); String strP = user.getPassword(); if (strUserid.equals(strUID)) { if (strPW.equals(strP)) { response.getWriter().append("欢迎" + strUsername + "登陆系统"); } else { response.getWriter().append("密码输入错误"); response.setHeader("refresh", "3;URL=login.html"); } } } else { response.getWriter().append("该用户不存在"); response.setHeader("refresh", "3;URL=login.html"); } } // response.getWriter().append("Served at: // yanzheng").append(request.getContextPath()); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse * response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package com.hanqi; //关于用户的实体类 public class User { //用户代码 private String UserID; public String getUserID() { return UserID; } public void setUserID(String userID) { this.UserID = userID; } //用户名称 private String UserName; public String getUserName() { return UserName; } public void setUserName(String userName) { UserName = userName; } //密码 private String Password; public String getPassword() { return Password; } public void setPassword(String password) { Password = password; } }
