JSP模式2 实现用户注册的功能

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JSP模式2 实现用户注册的功能

一实现的思路：

1．Register.jsp

负责向用户显示注册的页面，用户名、密码、确认密码、email

2．ControllerServlet.java

用来接收客户端提交的请求，然后进行验证：语法格式的验证和该用户是否是已经存在的用户，如果该用户是合法的，将该用户加入到users表中，然后跳转到loginSuccess.jsp页面上，显示用户信息。否则跳转到register.jsp，将错误信息显示出来

3．RegisterFormBean.java：用来封装用户输入的表单的数据，并可以做基本语法格式的验证

4．UserBean.java ：保存用户的信息，包括用户名、密码以及确认密码

5．DbUtil.java：集合对象 user,<”zhangsan”,user>

添加用户的方法 insertUser(User user)

6．自定义异常类---提示用户注册错误，写一个异常类 DbUtilException

二实现的代码：

1．register.jsp

<%@ 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>

<jsp:useBean id="registerForm"class="com.csdn.beans.RegisterFormBean"

scope="request"/>

<jsp:setPropertyproperty="*"name="registerForm"/>

<table>

<tbody>

<tr>

<td>

用户名:

</td>

<td>

</td>

<td>

<%=registerForm.getErrorMsg("name") %>

</td>

</tr>

<tr>

<td>

密  码:

</td>

<td>

</td>

<td>

<%=registerForm.getErrorMsg("password1") %>

</td>

</tr>

<tr>

<td>

确认密码：

</td>

<td>

</td>

<td>

<%=registerForm.getErrorMsg("password2") %>

</td>

</tr>

<tr>

<td>

email：

</td>

<td>

</td>

<td>

<%=registerForm.getErrorMsg("email") %>

</td>

</tr>

<tr>

<td>

</td>

<td>

</td>

<td>

</td>

</tr>

</tbody>

</table>

</form>

</body>

</html>

2．ControllerServlet.java

public void doPost(HttpServletRequestrequest, HttpServletResponse response)

throwsServletException, IOException {

RequestDispatcher rd =null;

//控制器

//获取表单提交的数据封装在registerFormBean对象中，进行语法格式的验证

RegisterFormBeanregisterForm = newRegisterFormBean();

request.setAttribute("registerForm", registerForm);

registerForm.setName(request.getParameter("name"));

registerForm.setPassword1(request.getParameter("password1"));

registerForm.setPassword2(request.getParameter("password2"));

registerForm.setEmail(request.getParameter("email"));

//验证

if(!registerForm.validte()){

//转向到register.jsp

rd = request.getRequestDispatcher("/register.jsp");

rd.forward(request, response);

return;

}

//将registerFormBean对象中的数据存储到UserBean对象中，然后调用DbUtil中的insertUtil

UserBean user = new UserBean();

user.setName(registerForm.getName());

user.setPassword(registerForm.getPassword1());

user.setPassword(registerForm.getPassword2());

user.setEmail(registerForm.getEmail());

DbUtil db = DbUtil.getInstance();

try {

db.insertUser(user);

} catch(DbUtilException ex) {

// 处理该异常

registerForm.setErrorMsg("name", ex.getErrorMsg("name"));

//转到register.jsp页面中

rd = request.getRequestDispatcher("/register.jsp");

rd.forward(request, response);

return;

}

//得到session对象

HttpSession session=request.getSession();

session.setAttribute("user", user);

rd =request.getRequestDispatcher("/loginSuccess");

rd.forward(request,response);

}

3．RegisterFormBean.java

package com.csdn.beans;

import java.util.Hashtable;

publicclass RegisterFormBean {

private String name = "";

private String password1 ="";

private String password2 ="";

private String email = "";

public RegisterFormBean() {

super();

// TODOAuto-generated constructor stub

}

public RegisterFormBean(String name,String password1, String password2,

String email) {

super();

this.name =name;

this.password1 =password1;

this.password2 =password2;

this.email =email;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name =name;

}

public String getPassword1() {

returnpassword1;

}

public void setPassword1(Stringpassword1) {

this.password1 =password1;

}

public String getPassword2() {

returnpassword2;

}

public void setPassword2(Stringpassword2) {

this.password2 =password2;

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email =email;

}

@Override

public String toString() {

return"RegisterFormBean [email=" + email + ", name=" + name

+ ", password1=" + password1 + ", password2=" + password2 +"]";

}

// 基本格式的验证

private Hashtable errors = new Hashtable();

@SuppressWarnings("unchecked")

public boolean validte() {

boolean okAll = true;

// 语法格式的验证

if(name.trim().equals("")) {

errors.put(name, "请重新输入");

okAll = false;

}

if(password1.length() > 10 || password1.length() < 6) {

errors.put("password1", "密码必须包含6-10个字符");

okAll = false;

}

if(!password2.equals("password1")) {

errors.put("password2", "密码不一致");

okAll = false;

}

if(!email.matches("[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+")){

errors.put("email", "邮箱格式不正确");

okAll = false;

}

return okAll;

}

public void setErrorMsg(String err,String errMsg) {

if (err != null &&errMsg != null){

errors.put(err, errMsg);

}

public String getErrorMsg(String err){

Object message =(String) errors.get(err);

return (String)((message == null)? "" : message);

}

4.UserBean.java

package com.csdn.beans;

publicclass UserBean {

private String name;

private String password;

private String email;

public UserBean() {

super();

// TODOAuto-generated constructor stub

}

public UserBean(String name, Stringpassword, String email) {

super();

this.name =name;

this.password =password;

this.email =email;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name =name;

}

public String getPassword() {

return password;

}

public void setPassword(Stringpassword) {

this.password =password;

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email =email;

}

@Override

public String toString() {

return"UserBean [email=" + email + ", name=" + name + ",password="

+ password + "]";

}

//验证方法

public boolean validatePassword(Stringpassword){

if(this.password.equals(password)){

return true;

}else{

return false;

}

5.DbUtil.java

package com.csdn.util;

import java.util.Hashtable;

import sun.security.jca.GetInstance;

import com.csdn.beans.UserBean;

import com.csdn.exception.DbUtilException;

//单利类的实现

publicclass DbUtil {

private Hashtable users = new Hashtable();

static DbUtil instance = new DbUtil();

private DbUtil(){

UserBean user1 = new UserBean();

user1.setName("张三");

user1.setPassword("1234567");

user1.setEmail("zhangsan@163.com");

UserBean user2 = new UserBean();

user2.setName("李四");

user2.setPassword("1234567");

user2.setEmail("zhangsan@163.com");

UserBean user3 = new UserBean();

user3.setName("王五");

user3.setPassword("1234567");

user3.setEmail("zhangsan@163.com");

users.put(user1.getName(),user1);

users.put(user2.getName(),user2);

users.put(user3.getName(),user3);

}

public static DbUtil getInstance(){

return instance;

}

public UserBean getUser(String name){

UserBean user =(UserBean) users.get(name);

return user;

}

public void insertUser(UserBean user) throwsDbUtilException{

if(user==null){

return;

}

StringuserName=user.getName();

if(users.get(userName)!=null){

//说明该用户名已经存在

DbUtilException ex = new DbUtilException();

ex.setErrorMsg("name","该用户已经存在");

throwex;

}

//说明该用户不存在,添加

users.put(userName,user);

}

6．自定义异常类

package com.csdn.exception;

import java.util.Hashtable;

//异常处理类

publicclass DbUtilException extendsException {

// 存储错误消息

private Hashtable errors = new Hashtable();

public void setErrorMsg(String err,String msg) {

if (err != null &&msg != null){

errors.put(err, msg);

}

public String getErrorMsg(String err){

Object message =(String) errors.get(err);

return (String)((message == null)? "" : message);

}