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" %>注册 注册 <%-- 1. 显示errors --> 字段错误 2. 显示异常错误 3. 回显 --%>${msg }
2.3 UserServlet
User
public class User {
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 {
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
public class UserServlet extends baseServlet {
private UserService userService = new UserService();
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 {
User form = CommonUtils.toBean(request.getParameterMap(), User.class);
try {
User user = userService.login(form);
request.getSession().setAttribute("session_user", user);
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";
}
}
public String active(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
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";
}
public String regist(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 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());
Map errors = new HashMap();
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！");
}
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";
}
try {
userService.regist(form);
} catch (UserException e) {
request.setAttribute("msg", e.getMessage());
request.setAttribute("form", form);
return "f:/jsps/user/regist.jsp";
}
// 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.getProperty("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) {
}
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
public class UserService {
private UserDao userDao = new UserDao();
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);
}
public void active(String code) throws UserException {
User user = userDao.findByCode(code);
if(user == null) throw new UserException("激活码无效！");
if(user.isState()) throw new UserException("您已经激活过了，不要再激活了，除非你想死！");
userDao.updateState(user.getUid(), true);
}
public User login(User form) throws UserException {
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
public class UserDao {
private QueryRunner qr = new TxQueryRunner();
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);
}
}
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);
}
}
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);
}
}
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);
}
}
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
4、
用户登录
流程：/jsps/user/login.jsp -> UserServlet#login() -> index.jsp
5、
用户退出
流程：top.jsp -> UserServlet#quit() -> login.jsp
quit()：把session销毁！
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。
