使用者子產品
1、使用者子產品的相關類建立
- domain：User
- dao：UserDao
- service：UserDao
- web.servlet：UserServlet
2、使用者注冊
2.1 注冊流程
/jsps/user/regist.jsp -> UserServlet#regist() -> msg.jsp
2.2 注冊頁面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>注冊</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" target="_blank" rel="external nofollow" >
-->
</head>
<body>
<h1>注冊</h1>
<%--
顯示errors --> 字段錯誤
顯示異常錯誤
回顯
--%>
<p style="color: red; font-weight: 900">${msg }</p>
<form action="<c:url value='/UserServlet'/>" method="post">
<input type="hidden" name="method" value="regist"/>
使用者名：<input type="text" name="username" value="${form.username }"/>
<span style="color: red; font-weight: 900">${errors.username }</span>
<br/>
密 碼：<input type="password" name="password" value="${form.password }"/>
<span style="color: red; font-weight: 900">${errors.password }</span>
<br/>
郵 箱：<input type="text" name="email" value="${form.email }"/>
<span style="color: red; font-weight: 900">${errors.email }</span>
<br/>
<input type="submit" value="注冊"/>
</form>
</body>
</html>
2.3 UserServlet
User
/**
* User的領域對象
*/
public class User {
/*
* 對應資料庫表
*/
private String uid;// 主鍵
private String username;// 使用者名
private String password;// 密碼
private String email;// 郵箱
private String code;// 激活碼
private boolean state;// 狀态（已激活和未激活）
BaseServlet
public class BaseServlet extends HttpServlet {
/*
* 它會根據請求中的method，來決定調用本類的哪個方法
*/
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");// 它是一個方法名稱
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表述層
*/
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. 封裝表單資料到form中
* 2. 輸入校驗（不寫了）
* 3. 調用service完成激活
* > 儲存錯誤資訊、form到request，轉發到login.jsp
* 4. 儲存使用者資訊到session中，然後重定向到index.jsp
*/
User form = CommonUtils.toBean(request.getParameterMap(), User.class);
try {
User user = userService.login(form);
request.getSession().setAttribute("session_user", user);
/*
* 給使用者添加一個購物車，即向session中儲存一Cart對象
*/
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. 擷取參數激活碼
* 2. 調用service方法完成激活
* > 儲存異常資訊到request域，轉發到msg.jsp
* 3. 儲存成功資訊到request域，轉發到msg.jsp
*/
String code = request.getParameter("code");
try {
userService.active(code);
request.setAttribute("msg", "恭喜，您激活成功了！請馬上登入！");
} catch (UserException e) {
request.setAttribute("msg", e.getMessage());
}
return "f:/jsps/msg.jsp";
}
/**
* 注冊功能
* @param request
* @param response
* @return
* @throws ServletException
* @throws IOException
*/
public String regist(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
/*
* 1. 封裝表單資料到form對象中
* 2. 補全：uid、code
* 3. 輸入校驗
* > 儲存錯誤資訊、form到request域，轉發到regist.jsp
* 4. 調用service方法完成注冊
* > 儲存錯誤資訊、form到request域，轉發到regist.jsp
* 5. 發郵件
* 6. 儲存成功資訊轉發到msg.jsp
*/
// 封裝表單資料
User form = CommonUtils.toBean(request.getParameterMap(), User.class);
// 補全
form.setUid(CommonUtils.uuid());
form.setCode(CommonUtils.uuid() + CommonUtils.uuid());
/*
* 輸入校驗
* 1. 建立一個Map，用來封裝錯誤資訊，其中key為表單字段名稱，值為錯誤資訊
*/
Map<String,String> errors = new HashMap<String,String>();
/*
* 2. 擷取form中的username、password、email進行校驗
*/
String username = form.getUsername();
if(username == null || username.trim().isEmpty()) {
errors.put("username", "使用者名不能為空！");
} else if(username.length() < || username.length() > ) {
errors.put("username", "使用者名長度必須在3~10之間！");
}
String password = form.getPassword();
if(password == null || password.trim().isEmpty()) {
errors.put("password", "密碼不能為空！");
} else if(password.length() < || password.length() > ) {
errors.put("password", "密碼長度必須在3~10之間！");
}
String email = form.getEmail();
if(email == null || email.trim().isEmpty()) {
errors.put("email", "Email不能為空！");
} else if(!email.matches("\\[email protected]\\w+\\.\\w+")) {
errors.put("email", "Email格式錯誤！");
}
/*
* 3. 判斷是否存在錯誤資訊
*/
if(errors.size() > ) {
// 1. 儲存錯誤資訊
// 2. 儲存表單資料
// 3. 轉發到regist.jsp
request.setAttribute("errors", errors);
request.setAttribute("form", form);
return "f:/jsps/user/regist.jsp";
}
/*
* 調用service的regist()方法
*/
try {
userService.regist(form);
} catch (UserException e) {
/*
* 1. 儲存異常資訊
* 2. 儲存form
* 3. 轉發到regist.jsp
*/
request.setAttribute("msg", e.getMessage());
request.setAttribute("form", form);
return "f:/jsps/user/regist.jsp";
}
/*
* 發郵件
* 準備配置檔案！
*/
// 擷取配置檔案内容
Properties props = new Properties();
props.load(this.getClass().getClassLoader()
.getResourceAsStream("email_template.properties"));
String host = props.getProperty("host");//擷取伺服器主機
String uname = props.getProperty("uname");//擷取使用者名
String pwd = props.getProperty("pwd");//擷取密碼
String from = props.getProperty("from");//擷取發件人
String to = form.getEmail();//擷取收件人
String subject = props.getProperty("subject");//擷取主題
String content = props.getProperty("content");//擷取郵件内容
content = MessageFormat.format(content, form.getCode());//替換{0}
Session session = MailUtils.createSession(host, uname, pwd);//得到session
Mail mail = new Mail(from, to, subject, content);//建立郵件對象
try {
MailUtils.send(session, mail);//發郵件！
} catch (MessagingException e) {
}
/*
* 1. 儲存成功資訊
* 2. 轉發到msg.jsp
*/
request.setAttribute("msg", "恭喜，注冊成功！請馬上到郵箱激活");
return "f:/jsps/msg.jsp";
}
}
2.4 UserService
/**
* User業務層
*/
public class UserService {
private UserDao userDao = new UserDao();
/**
* 注冊功能
* @param form
*/
public void regist(User form) throws UserException{
// 校驗使用者名
User user = userDao.findByUsername(form.getUsername());
if(user != null) throw new UserException("使用者名已被注冊！");
// 校驗email
user = userDao.findByEmail(form.getEmail());
if(user != null) throw new UserException("Email已被注冊！");
// 插入使用者到資料庫
userDao.add(form);
}
/**
* 激活功能
* @throws UserException
*/
public void active(String code) throws UserException {
/*
* 1. 使用code查詢資料庫，得到user
*/
User user = userDao.findByCode(code);
/*
* 2. 如果user不存在，說明激活碼錯誤
*/
if(user == null) throw new UserException("激活碼無效！");
/*
* 3. 校驗使用者的狀态是否為未激活狀态，如果已激活，說明是二次激活，抛出異常
*/
if(user.isState()) throw new UserException("您已經激活過了，不要再激活了，除非你想死！");
/*
* 4. 修改使用者的狀态
*/
userDao.updateState(user.getUid(), true);
}
/**
* 登入功能
* @param form
* @return
* @throws UserException
*/
public User login(User form) throws UserException {
/*
* 1. 使用username查詢，得到User
* 2. 如果user為null，抛出異常（使用者名不存在）
* 3. 比較form和user的密碼，若不同，抛出異常（密碼錯誤）
* 4. 檢視使用者的狀态，若為false，抛出異常（尚未激活）
* 5. 傳回user
*/
User user = userDao.findByUsername(form.getUsername());
if(user == null) throw new UserException("使用者名不存在！");
if(!user.getPassword().equals(form.getPassword()))
throw new UserException("密碼錯誤！");
if(!user.isState()) throw new UserException("尚未激活！");
return user;
}
}
2.5 UserDao
/**
* User持久層
*/
public class UserDao {
private QueryRunner qr = new TxQueryRunner();
/**
* 按使用者名查詢
* @param username
* @return
*/
public User findByUsername(String username) {
try {
String sql = "select * from tb_user where username=?";
return qr.query(sql, new BeanHandler<User>(User.class), username);
} catch(SQLException e) {
throw new RuntimeException(e);
}
}
/**
* 按email查詢
* @param email
* @return
*/
public User findByEmail(String email) {
try {
String sql = "select * from tb_user where email=?";
return qr.query(sql, new BeanHandler<User>(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);
}
}
/**
* 按激活碼查詢
* @param code
* @return
*/
public User findByCode(String code) {
try {
String sql = "select * from tb_user where code=?";
return qr.query(sql, new BeanHandler<User>(User.class), code);
} catch(SQLException e) {
throw new RuntimeException(e);
}
}
/**
* 修改指定使用者的指定狀态
* @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、使用者激活
流程：使用者的郵件中 -> UserServlet#active() -> msg.jsp
4、使用者登入
流程：/jsps/user/login.jsp -> UserServlet#login() -> index.jsp
5、使用者退出
流程：top.jsp -> UserServlet#quit() -> login.jsp
quit()：把session銷毀！