javaweb图书商城设计之用户模块(1)

网友投稿 202 2023-06-29


javaweb图书商城设计之用户模块(1)

本文主要为大家分析了图书商城的用户模块,具体内容如下

1、用户模块的相关类创建

domain:User

dao:UserDao

service:UserDao

web.servlet:UserServlet

2、用户注册

2.1 注册流程

/jsps/user/regist.jsp -> UserServlet#regist() -> msg.jsp

2.2 注册页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%--

1. 显示errors --> 字段错误

2. 显示异常错误

3. 回显

--%>

${msg }

用户名:

${errors.username }


密 码:

${errors.password }


邮 箱:

${errors.email }


2.3 UserServlet

User

/**

* User的领域对象

*/

public class User {

/*

* 对应数据库表

*/

private String uid;// 主键

private String username;// 用户名

private String password;// 密码

private String email;// 邮箱

private String code;// 激活码

private boolean state;// 状态(已激活和未激活)

BaseServlet

public class BaseServlet extends HttpServlet {

/*

* 它会根据请求中的method,来决定调用本类的哪个方法

*/

protected void service(HttpServletRequest req, HttpServletResponse res)

throws ServletException, IOException {

req.setCharacterEncoding("UTF-8");

res.setContentType("text/html;charset=utf-8");

try {

// 例如:http://localhost:8080/demo1/xxx?m=add

String method = req.getParameter("method");// 它是一个方法名称

Class c = this.getClass();

Method m = c.getMethod(method, HttpServletRequest.class,

HttpServletResponse.class);

String result = (String) m.invoke(this, req, res);

if(result != null && !result.isEmpty()) {

req.getRequestDispatcher(result).forward(req, res);

}

} catch (Exception e) {

throw new ServletException(e);

}

}

}

UserServlet

/**

* User表述层

*/

public class UserServlet extends BaseServlet {

private UserService userService = new UserService();

/**

* 退出功能

* @param request

* @param response

* @return

* @throws ServletException

* @throws IOException

*/

public String quit(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

request.getSession().invalidate();

return "r:/index.jsp";

}

public String login(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

/*

* 1. 封装表单数据到form中

* 2. 输入校验(不写了)

* 3. 调用service完成激活

* > 保存错误信息、form到request,转发到login.jsp

* 4. 保存用户信息到session中,然后重定向到index.jsp

*/

User form = CommonUtils.toBean(request.getParameterMap(), User.class);

try {

User user = userService.login(form);

request.getSession().setAttribute("session_user", user);

/*

* 给用户添加一个购物车,即向session中保存一Cart对象

*/

request.getSession().setAttribute("cart", new Cart());

return "r:/index.jsp";

} catch (UserException e) {

request.setAttribute("msg", e.getMessage());

request.setAttribute("form", form);

return "f:/jsps/user/login.jsp";

}

}

/**

* 激活功能

* @param request

* @param response

* @return

* @throws ServletException

* @throws IOException

*/

public String active(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

/*

* 1. 获取参数激活码

* 2. 调用service方法完成激活

* > 保存异常信息到request域,转发到msg.jsp

* 3. 保存成功信息到request域,转发到msg.jsp

*/

String code = request.getParameter("code");

try {

userService.active(code);

request.setAttribute("msg", "恭喜,您激活成功了!请马上登录!");

} catch (UserException e) {

request.setAttribute("msg", e.getMessage());

}

return "f:/jsps/msg.jsp";

}

/**

* 注册功能

* @param request

* @param response

* @return

* @throws ServletException

* @throws IOException

*/

public String regist(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

/*

* 1. 封装表单数据到form对象中

* 2. 补全:uid、code

* 3. 输入校验

* > 保存错误信息、form到request域,转发到regist.jsp

* 4. 调用service方法完成注册

* > 保存错误信息、form到request域,转发到regist.jsp

* 5. 发邮件

* 6. 保存成功信息转发到msg.jsp

*/

// 封装表单数据

User form = CommonUtils.toBean(request.getParameterMap(), User.class);

// 补全

form.setUid(CommonUtils.uuid());

form.setCode(CommonUtils.uuid() + CommonUtils.uuid());

/*

* 输入校验

* 1. 创建一个Map,用来封装错误信息,其中key为表单字段名称,值为错误信息

*/

Map errors = new HashMap();

/*

* 2. 获取form中的username、password、email进行校验

*/

String username = form.getUsername();

if(username == null || username.trim().isEmpty()) {

errors.put("username", "用户名不能为空!");

} else if(username.length() < 3 || username.length() > 10) {

errors.put("username", "用户名长度必须在3~10之间!");

}

String password = form.getPassword();

if(password == null || password.trim().isEmpty()) {

errors.put("password", "密码不能为空!");

} else if(password.length() < 3 || password.length() > 10) {

errors.put("password", "密码长度必须在3~10之间!");

}

String email = form.getEmail();

if(email == null || email.trim().isEmpty()) {

errors.put("email", "Email不能为空!");

} else if(!email.matches("\\w+@\\w+\\.\\w+")) {

errors.put("email", "Email格式错误!");

}

/*

* 3. 判断是否存在错误信息

*/

if(errors.size() > 0) {

// 1. 保存错误信息

// 2. 保存表单数据

// 3. 转发到regist.jsp

request.setAttribute("errors", errors);

request.setAttribute("form", form);

return "f:/jsps/user/regist.jsp";

}

/*

* 调用service的regist()方法

*/

try {

userService.regist(form);

} catch (UserException e) {

/*

* 1. 保存异常信息

* 2. 保存form

* 3. 转发到regist.jsp

*/

request.setAttribute("msg", e.getMessage());

request.setAttribute("form", form);

return "f:/jsps/user/regist.jsp";

}

/*

* 发邮件

* 准备配置文件!

*/

// 获取配置文件内容

Properties props = new Properties();

props.load(this.getClass().getClassLoader()

.getResourceAsStream("email_template.properties"));

String host = props.getProperty("host");//获取服务器主机

String uname = props.getProperty("uname");//获取用户名

String pwd = props.gethttp://Property("pwd");//获取密码

String from = props.getProperty("from");//获取发件人

String to = form.getEmail();//获取收件人

String subject = props.getProperty("subject");//获取主题

String content = props.getProperty("content");//获取邮件内容

content = MessageFormat.format(content, form.getCode());//替换{0}

Session session = MailUtils.createSession(host, uname, pwd);//得到session

Mail mail = new Mail(from, to, subject, content);//创建邮件对象

try {

MailUtils.send(session, mail);//发邮件!

} catch (MessagingException e) {

}

/*

* 1. 保存成功信息

* 2. 转发到msg.jsp

*/

request.setAttribute("msg", "恭喜,注册成功!请马上到邮箱激活");

return "f:/jsps/msg.jsp";

}

}

2.4 UserService

/**

* User业务层

*/

public class UserService {

private UserDao userDao = new UserDao();

/**

* 注册功能

* @param form

*/

public void regist(User form) throws UserException{

// 校验用户名

User user = userDao.findByUsername(form.getUsername());

if(user != null) throw new UserException("用户名已被注册!");

// 校验email

user = userDao.findByEmail(form.getEmail());

if(user != null) throw new UserException("Email已被注册!");

// 插入用户到数据库

userDao.add(form);

}

/**

* 激活功能

* @throws UserException

*/

public void active(String code) throws UserException {

/*

* 1. 使用code查询数据库,得到user

*/

User user = userDao.findByCode(code);

/*

* 2. 如果user不存在,说明激活码错误

*/

if(user == null) throw new UserException("激活码无效!");

/*

* 3. 校验用户的状态是否为未激活状态,如果已激活,说明是二次激活,抛出异常

*/

if(user.isState()) throw new UserException("您已经激活过了,不要再激活了,除非你想死!");

/*

http:// * 4. 修改用户的状态

*/

userDao.updateState(user.getUid(), true);

}

/**

* 登录功能

* @param form

* @return

* @throws UserException

*/

public User login(User form) throws UserException {

/*

* 1. 使用username查询,得到User

* 2. 如果user为null,抛出异常(用户名不存在)

* 3. 比较form和user的密码,若不同,抛出异常(密码错误)

* 4. 查看用户的状态,若为false,抛出异常(尚未激活)

* 5. 返回user

*/

User user = userDao.findByUsername(form.getUsername());

if(user == null) throw new UserException("用户名不存在!");

if(!user.getPassword().equals(form.getPassword()))

throw new UserException("密码错误!");

if(!user.isState()) throw new UserException("尚未激活!");

return user;

}

}

2.5 UserDao

/**

* User持久层

*/

public class UserDao {

private QueryRunner qr = new TxQueryRunnehttp://r();

/**

* 按用户名查询

* @param username

* @return

*/

public User findByUsername(String username) {

try {

String sql = "select * from tb_user where username=?";

return qr.query(sql, new BeanHandler(User.class), username);

} catch(SQLException e) {

throw new RuntimeException(e);

}

}

/**

* 按email查询

* @param email

* @return

*/

public User findByEmail(String email) {

try {

String sql = "select * from tb_user where email=?";

return qr.query(sql, new BeanHandler(User.class), email);

} catch(SQLException e) {

throw new RuntimeException(e);

}

}

/**

* 插入User

* @param user

*/

public void add(User user) {

try {

String sql = "insert into tb_user values(?,?,?,?,?,?)";

Object[] params = {user.getUid(), user.getUsername(),

user.getPassword(), user.getEmail(), user.getCode(),

user.isState()};

qr.update(sql, params);

} catch(SQLException e) {

throw new RuntimeException(e);

}

}

/**

* 按激活码查询

* @param code

* @return

*/

public User findByCode(String code) {

try {

String sql = "select * from tb_user where code=?";

return qr.query(sql, new BeanHandler(User.class), code);

} catch(SQLException e) {

throw new RuntimeException(e);

}

}

/**

* 修改指定用户的指定状态

* @param uid

* @param state

*/

public void updateState(String uid, boolean state) {

try {

String sql = "update tb_user set state=? where uid=?";

qr.update(sql, state, uid);

} catch(SQLException e) {

throw new RuntimeException(e);

}

}

}

3、用户激活

流程:用户的邮件中 -> UserServlet#active() -> msg.jsp

用户登录

流程:/jsps/user/login.jsp -> UserServlet#login() -> index.jsp

用户退出

流程:top.jsp -> UserServlet#quit() -> login.jsp

quit():把session销毁!


版权声明:本文内容由网络用户投稿,版权归原作者所有,本站不拥有其著作权,亦不承担相应法律责任。如果您发现本站中有涉嫌抄袭或描述失实的内容,请联系我们jiasou666@gmail.com 处理,核实后本网站将在24小时内删除侵权内容。

上一篇:java的poi技术读取和导入Excel实例
下一篇:javaweb图书商城设计之分类模块(2)
相关文章

 发表评论

暂时没有评论,来抢沙发吧~