Javaweb Book Mall Design user module (1) _java

This article mainly for everyone to analyze the Book Mall user module, the specific contents are as follows

1, the user module related class creation

Domain:user
Dao:userdao
Service:userdao
Web.servlet:UserServlet

2, User Registration

2.1 Registration Process

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

2.2 Registration Page

<%@ 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" >  

2.3 Userservlet

User

/**
 * User domain object/
 public
class User {/
 *
  * Corresponding database table * *
 private String uid;//primary key
 private String username;//user name
 private string password;//password
 private string email;//mailbox
 private string code;//activation code C12/>private boolean state;//state (activated and inactive)

Baseservlet

public class Baseservlet extends HttpServlet {
  * * * It will decide which method to call this class, based on the methods in the request * *
 protected void Service (HttpServletRequest req, httpservletresponse Res)
   throws Servletexception, IOException {
  Req.setcharacterencoding ("UTF-8");
  Res.setcontenttype ("Text/html;charset=utf-8");
  try {
   //For example: Http://localhost:8080/demo1/xxx?m=add
   String method = Req.getparameter ("methods");//It is a way name
   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 Presentation layer/public class Userservlet extends Baseservlet {private UserService userservice = new UserService (); 
 /** * Exit Function * @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. Encapsulate form data into form * 2. Input checksum (NO) * 3. Invoke service completes activation * > Save error message, form to request, forward to login.jsp * 4. Save with
  User information into session, then redirect to index.jsp/User form = Commonutils.tobean (Request.getparametermap (), user.class);
   try {User user = Userservice.login (form);
   Request.getsession (). setattribute ("Session_user", user);
   * * To add a shopping cart to the user, that is, save a Cart object to the session/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"; }/** * Activation function * @param request * @param response * @return * @throws servletexception * @throws ioexceptio n */Public String Active (HttpServletRequest request, httpservletresponse response) throws Servletexception, Ioexcep tion {* * 1. Get parameter Activation code * 2. Invoke the service method to complete activation * > Save exception information to request field and forward to msg.jsp * 3. Save Success information to request field, forward to Msg.js
  p */String code = request.getparameter ("code");
   try {userservice.active (code); Request.setattribute ("msg", "Congratulations, your activation is successful!") Please login now!
  ");
  catch (Userexception e) {request.setattribute ("msg", E.getmessage ());
 Return to "f:/jsps/msg.jsp";
  /** * Registration Function * @param request * @param response * @return * @throws servletexception * @throws IOException */Public String regist (httpservletrequest request, HttpServletResponse responsE) throws Servletexception, IOException {/* 1. Encapsulate form data to form Object * 2. Complement: UID, code * 3. Input CHECKSUM * > Save error message , form to request field, forwarded to REGIST.JSP * 4. Call service method completes registration * > Save error message, form to request field, forward to regist.jsp * 5. Send mail * 6.
  Save success message forward to msg.jsp//Encapsulate form data User form = Commonutils.tobean (Request.getparametermap (), user.class);
  Complement full Form.setuid (Commonutils.uuid ());
  Form.setcode (Commonutils.uuid () + commonutils.uuid ()); * * Input CHECKSUM * 1.
  Create a MAP that encapsulates the error message, where key is the form field name, and the value is the error message/map<string,string> errors = new hashmap<string,string> (); * * 2.
  Get the username, password, email to verify the form */String username = Form.getusername (); if (username = null | | Username.trim (). IsEmpty ()) {Errors.put ("username", "user name cannot be empty!")
  "); else if (Username.length () < 3 | | username.length () > Ten) {errors.put ("username", "user name length must be between 3~10!")
  ");
  String password = Form.getpassword (); if (password = null | | Password.trim (). IsEmpty ()) {Errors.puT ("Password", "Password cannot be empty!")
  "); else if (Password.length () < 3 | | password.length () > Ten) {errors.put ("password", "password length must be between 3~10!")
  ");
  String email = form.getemail (); if (email = null | | Email.trim () isempty ()) {errors.put ("email", "email cannot be empty!")
  "); else if (!email.matches ("\\w+@\\w+\\.\\w+")) {errors.put ("email", "email format is wrong!")
  "); } * * 3. Determine if there is an error message */if (errors.size () > 0) {//1. Save error message//2. Save form data//3. Forward to regist.jsp Request.setattribu
   Te ("Errors", errors);
   Request.setattribute ("form", form);
  return "f:/jsps/user/regist.jsp";
  * * * the Regist () method for invoking the service is * * */try {userservice.regist (form); catch (Userexception e) {/* 1. Save exception Information * 2. Save form * 3. Forward to regist.jsp * * Request.setattribute ("M
   SG ", E.getmessage ());
   Request.setattribute ("form", form);
  return "f:/jsps/user/regist.jsp";
   * * * Send mail * prepare configuration file!
  //Get configuration file content Properties props = new properties (); Props.load (this.GetClass (). getClassLoader (). getResourceAsStream ("email_template.properties")); String host = Props.getproperty ("host");/Get server host string uname = Props.getproperty ("uname");/get user name string pwd = Props . GetProperty ("pwd");/get password string from = Props.getproperty (' from ');//Get sender string to = Form.getemail ();//Get Recipient Strin G subject = Props.getproperty ("subject"); Get the subject String content = Props.getproperty ("content")//Get message content = Messa Geformat.format (content, Form.getcode ()),//replace {0} session session = Mailutils.createsession (host, uname, PWD);
  Get session mail = new mail (from, to, subject, content);//Create a Mail object try {mailutils.send (session, mail);/e-mail! catch (Messagingexception e) {} * * 1. Save Success Information * 2. Forward to msg.jsp/Request.setattribute ("MSG", "Congratulations, registration success!")
  Please immediately to the mailbox activation ");
 return "f:/jsps/msg.jsp";

 }
}

2.4 UserService

/** * User Business Layer * * * public class UserService {private Userdao Userdao = new Userdao (); /** * Registration function * @param form */public void regist (user form) throws userexception{//verify username user = Userdao.f
  Indbyusername (Form.getusername ()); if (user!= null) throw new Userexception ("username is already registered!")

  ");
  Verify Email user = Userdao.findbyemail (Form.getemail ()); if (user!= null) throw new Userexception ("email has been registered!")

  ");
 Insert user to database Userdao.add (form); /** * Activation function * @throws userexception/public void Active (String code) throws userexception {* * * 1. Using CO
  De query database, get user * * user = Userdao.findbycode (code); * * 2. If user does not exist, the activation code error */if (user = null) throw new userexception ("Invalid Activation Code!")
  "); * * 3. Verify that the user's State is inactive and, if activated, two activation, throws an exception/if (User.isstate ()) throw new Userexception ("You have activated, do not activate, unless you want to die!")

  "); * * 4.
 Modify the user's status/userdao.updatestate (User.getuid (), true); /** * Login function * @param form * @return * @throws UserexceptiOn/Public user login (user form) throws userexception {* * 1. Use username query to get user * 2. If user is null, throw an exception ( Name does not exist) * 3. Compare form and user passwords, if different, throw an exception (password error) * 4. View the user's status, false, throw an exception (not activated) * 5.
  Returns user */user user = Userdao.findbyusername (form.getusername ()); if (user = null) throw new Userexception ("username does not exist!")
  "); if (!user.getpassword (). Equals (Form.getpassword ())) throw new Userexception ("Bad password!
  "); if (!user.isstate ()) throw new Userexception ("Not yet activated!")

  ");
 return user;

 }
}

2.5 Userdao

/** * User Persistence Layer */public class Userdao {private Queryrunner QR = new Txqueryrunner ();  /** * by user name * @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);  /** * Email Inquiry * @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); /** * Insert User * @param user/public void Add (user user) {try {String sql = ' INSERT INTO Tb_user valu
   ES (?,?,?,?,?,?) "; 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); /** * by Activation Code query * @param code * @return/Public User Findbycode (string code) {try {String sql = ' sel
   ECT * from Tb_user where code=? ";
  return qr.query (SQL, New beanhandler<user> (User.class), code);
  catch (SQLException e) {throw new RuntimeException (e); }/** * Modifies the specified state of the specified user * @param uid * @param states/public void Updatestate (String uid, Boolean state) {TR y {String sql = update Tb_user set state=?
   where uid=? ";
  Qr.update (SQL, State, UID);
  catch (SQLException e) {throw new RuntimeException (e);

 }
 }
}

3, User activation

Process:-> userservlet#active ()-> in the user's message msg.jsp

4,

User Login

Process:/jsps/user/login.jsp-> userservlet#login ()-> index.jsp

5,

User exits

Process: top.jsp-> userservlet#quit ()-> login.jsp

Quit (): Destroy the session!

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.