<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>首页页面</title> </head> <body> <form action="ControllerServlet" method="post"> <h3>注册</h3> <div id="outer"> <div> <div class="ch">用户名：</div> <div class="ip"> <input type="text" name="username" value="${formBean.username } "/> <span>${formBean.errors.username }${DBMes}</span> </div> </div> <div> <div class="ch">密码：</div> <div class="ip"> <input type="password" name="password1" /> <span>${formBean.errors.password1 }${DBMes}</span> </div> </div> <div> <div class="ch">确认密码：</div> <div class="ip"> <input type="password" name="password2" /> <span>${formBean.errors.password2 }${DBMes}</span> </div> </div> <br> <div id="bt"> <input type="reset" value="重置" /> <input type="submit" value="注册"/> </div> </div> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>注册成功</title> <style type="text/css"> #main{ 500px; height:auto; } #main div { 200px; height:auto; } ul { padding-top:1px; padding-left:1px; list-style:none; } </style> </head> <body> <!-- 不允许用户直接来访问 --> <c:if test="${sessionScope.UserBean == null }"> <jsp:forward page="/register.jsp"></jsp:forward> </c:if> <div id="main"> <div id="welcom">恭喜你，登录成功</div> <hr> <div>你的信息</div> <div> <ul> <li>用户名：${UserBean.username }</li> <li>密码：${UserBean.password }</li> </ul> </div> </div> </body> </html>
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.0" 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_0.xsd"> <display-name>chap12</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet> <description></description> <description>ControllerServlet</description> <servlet-name>ControllerServle</servlet-name> <servlet-class>cn.itcast.chap12.model2</servlet-class> </servlet> <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>ControllerServlet</servlet-name> <servlet-class>cn.itcast.chap12.model2.web.ControllerServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>ControllerServlet</servlet-name> <url-pattern>/ControllerServlet</url-pattern> </servlet-mapping> </web-app>
package cn.itcast.chap12.model2.domain; public class UserBean { private String username;//用户名 private String password1;//密码 public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword1() { return password1; } public void setPassword1(String password1) { this.password1 = password1; } }
package cn.itcast.chap12.model2.domain; import java.util.HashMap; import java.util.Map; /** * 用来封装用户的注册参数 * * */ public class RegisterFormBean { private String username;//用户名 private String password1;//密码 private String password2;//确认密码 public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword1() { return password1; } public void setPassword1(String password1) { this.password1 = password1; } public String getPassword2() { return password2; } public void setPassword2(String password2) { this.password2 = password2; } //---------进行服务端的数据------------ //1.定义一个变量来接收用户校验的信息，比如说用户名是否符合规范 //第一个参数 属性名称 第二个参数：属性值是否符合规范，比如“username”，“有错误” private Map<String,String> errors =new HashMap<String,String>(); public boolean validate(){ //2.定义变量，用于判断是否满足规范，如果满足就返回true ，不满足就返回false boolean flag = true; if(username == null || username.trim().equals("")){ errors.put("username", "请输入用户名"); flag = false; return flag; } if(password1 == null || password1.trim().equals("")){ errors.put("password1", "请输入密码"); flag = false; return flag; }else if(password1.length()<12 || password1.length()>6){ errors.put("password", "请输入6-12个字符"); flag = false; return flag; } if(password1 != null || !password1.equals("password2")){ errors.put("password2", "俩次输入密码不一致"); flag = false; return flag; } return flag; } //获取错误信息的方法 public Map<String, String> getErrors() { return errors; } //提供map集合中添加错误信息 public void setErrorMsg(String err,String errMsg){ if(err != null && errMsg != null){ errors.put(err, errMsg); } } }
package cn.itcast.chap12.model2.util; import java.util.HashMap; import cn.itcast.chap12.model2.domain.RegisterFormBean; import cn.itcast.chap12.model2.domain.UserBean; /** * * 模拟数据库 * */ public class DBUtil { private static DBUtil instance = new DBUtil(); public static DBUtil getInstance(){ return instance; } //定义集合，来保存用户注册的数据 private HashMap<String,RegisterFormBean> users = new HashMap<String,RegisterFormBean>(); //插入俩条数据 public DBUtil(){ RegisterFormBean user1 = new RegisterFormBean(); user1.setUsername("litao"); user1.setPassword1("123456"); users.put("litao",user1 ); RegisterFormBean user2 = new RegisterFormBean(); user2.setUsername("rose"); user2.setPassword1("asdfg"); users.put("litao",user2 ); } //提供获取值的方法 public RegisterFormBean getUser(String name){ RegisterFormBean user = users.get(name); return user; } //提供插入数据库方法 public boolean insertUser(UserBean user){ //用户为null，不能插入 if( user == null){ return false; } //判断用户名是否重复 String username = user.getUsername();//用户提交过来时注册的参数 RegisterFormBean userDB = users.get(username); if(userDB != null){ //根据注册参数查询数据有用户对象，表明用户存在 return false; } users.put(username, userDB); return true; } }
package cn.itcast.chap12.model2.web; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import cn.itcast.chap12.model2.domain.RegisterFormBean; import cn.itcast.chap12.model2.domain.UserBean; import cn.itcast.chap12.model2.util.DBUtil; public class ControllerServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.处理响应和请求的中文乱码问题 response.setContentType("text/html;charset=utf-8"); response.setCharacterEncoding("utf-8"); //2.获取用户提交的注册参数，封装到注册的JavaBean //BeanUtils.populate(new RrgisterFormBean(), request.getParameterMap()); String username = request.getParameter("username"); String password1 = request.getParameter("password1"); String password2 = request.getParameter("password2"); RegisterFormBean formBean = new RegisterFormBean(); formBean.setUsername(username); formBean.setPassword1(password1); formBean.setPassword2(password2); //3.在服务器端校验数据是否规范和数据的正确性 if(!formBean.validate()){ //数据不规范 request.setAttribute("formBean", formBean); request.getRequestDispatcher("/register.jsp").forward(request, response); return; } //4.把数据封装到UserBean,传递给数据库进行操作 UserBean userBean = new UserBean(); userBean.setUsername(username); userBean.setPassword1(password1); //5.调用DBUtil的插入方法，完成注册 boolean b = DBUtil.getInstance().insertUser(userBean); //6.判断是否插入成功 if(!b){ //插入失败 request.setAttribute("DBMes","用户已经存在" ); request.setAttribute("formBean", formBean); request.getRequestDispatcher("/register.jsp").forward(request, response); return; } //7.插入成功 response.getWriter().print("恭喜你注册成功，3秒后自动跳转"); //为了在主页面回显用户信息，需要把用户信息存到session对象 request.getSession().setAttribute("userBean", userBean); //注册成功，三秒后跳转到主页面中 response.setHeader("refresh","3;url=scc.jsp" ); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } }