Thực hành EJB (Enterprise Java Bean) Lab 5

IT Research Department @BKAP 2015 Page 1 / 17 Lab 05 Singleton Session Beans Mục tiêu - Thao tác với Singleton Session Beans Phần I Bài tập step by step Bài 1 Tạo project EJB với Sin

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IT Research Department @BKAP 2015 Page 1 / 17

Lab 05 Singleton Session Beans Mục tiêu

- Thao tác với Singleton Session Beans

Phần I Bài tập step by step

Bài 1

Tạo project EJB với Singleton Session Beans có interface là Remote cho phép đăng ký, đăng nhập User của ChatRoom:

UserChat

Project thực hiện các công việc sau:

- Tạo class UserChat tương ứng với bảng UserChat trong CSDL

- Tạo Singleton Session Bean Remote gồm các phương thức sau:

+ registerUser: Đăng ký User

+ login: Đăng nhập User

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Step 1: Tạo Table UserChat trong Database EJB và các procedure thực hiện nghiệp vụ

registerUser, login

 Tạo Database EJB và Table UserChat

Create DataBase EJB

go

USE [EJB]

GO

/****** Object: Table [dbo].[UserChat] Script Date: 6/3/2016 11:31:31 AM ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

CREATE TABLE [dbo].[UserChat](

[UserID] [int] IDENTITY(1,1) NOT NULL,

[UserName] [nvarchar](50) NOT NULL,

[Password] [nvarchar](50) NOT NULL,

[UCreated] [date] NOT NULL,

[Mail] [nvarchar](50) NULL,

[Address] [nvarchar](100) NULL,

[Phone] [nvarchar](50) NULL,

[StatusLogin] [int] NULL,

CONSTRAINT [PK_EUser] PRIMARY KEY CLUSTERED

(

[UserID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS =

ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]

GO

 Tạo Procedure

 checkLogin

USE [EJB]

GO

CREATE PROCEDURE [dbo].[checkLogin]

@userName nvarchar(50),

@password nvarchar(50),

@checkNumber int OUTPUT,

@numberOnline int OUTPUT

AS

BEGIN

SELECT @checkNumber = COUNT(*) FROM UserChat u WHERE u.UserName = @userName and u.Password

= @password

if @checkNumber > 0

BEGIN

UPDATE UserChat

SET StatusLogin = 1;

SELECT @numberOnline = COUNT(*) FROM UserChat u WHERE u.StatusLogin = 1;

END

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 registerUser

USE [EJB]

GO

CREATE PROCEDURE [dbo].[registerUser]

@userName nvarchar(50),

@password nvarchar(50),

@mail nvarchar(50),

@address nvarchar(100),

@phone nvarchar(50)

AS

BEGIN

DECLARE @date date;

SET @date = GETDATE();

INSERT INTO UserChat

VALUES (@userName,@password,@date,@mail,@address,@phone,0)

END

Step 2: Tạo Project EJB tên Session05 với Session Bean là Singleton - tên S05SingletonBean

và Interface là Remote – tên S05InterfaceRemote (Như đã hướng dẫn ở Lab trước)

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 Cấu trúc ứng dụng sau khi hoàn thành

Step 3: Khai báo các phương thức nghiệp vụ trên S05SingletonBeanRemote

S05SingletonBeanRemote.java

package bean;

import javax.ejb.Remote;

/**

*

* @author Quang

*/

@Remote

public interface S05SingletonBeanRemote {

public String registerUser(String userName, String password, String mail, String address, String phone);

public int login(String userName, String password);

}

Step 4: Xây dựng java class DBConnection kết nối với DataBase SQL Server 2012 (Đặt trong

package util)

package util;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

/**

*

* @author admin

*/

public class DBConnection {

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private static final String URL = "jdbc:sqlserver://localhost:1433;databaseName=EJB";

private static final String DB_DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";

private static final String user_db = "sa";

private static final String pass_db = "Gacon1984";

public static Connection getDBConnection() {

Connection conn = null;

try {

Class.forName( DB_DRIVER);

} catch (ClassNotFoundException e) {

e.printStackTrace();

}

try {

conn = DriverManager.getConnection( URL, user_db, pass_db);

} catch (SQLException ex) {

ex.printStackTrace();

}

return conn;

}

Step 5: Thực thi các phương thức nghiệp vụ trên S05SingletonBean

S03_04StatelessBean.java

package bean;

import java.sql.CallableStatement;

import java.sql.Connection;

import java.sql.Types;

import javax.ejb.Singleton;

import util.DBConnection;

/**

*

* @author Quang

*/

@Singleton

public class S05SingletonBean implements S05SingletonBeanRemote {

@Override

public String registerUser(String userName, String password, String mail, String address, String phone) {

CallableStatement callableStatement = null;

try {

conn = DBConnection.getDBConnection();

String registerUser = "{call registerUser(?,?,?,?,?)}";

callableStatement = conn.prepareCall(registerUser);

callableStatement.setString(1, userName);

callableStatement.setString(2, password);

callableStatement.setString(3, mail);

callableStatement.setString(4, address);

callableStatement.executeUpdate();

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return "Success";

} catch (Exception e) {

return "Error";

}

@Override

public int login(String userName, String password) {

CallableStatement callableStatement = null;

int check = 0;

int numberOnline = 0;

try {

conn = DBConnection.getDBConnection();

String checkLogin = "{call checkLogin(?,?,?,?)}";

callableStatement = conn.prepareCall(checkLogin);

callableStatement.setString(1, userName);

callableStatement.registerOutParameter(3, Types.INTEGER);

callableStatement.registerOutParameter(4, Types.INTEGER);

callableStatement.execute();

check = callableStatement.getInt(3);

numberOnline = callableStatement.getInt(4);

}

if (check > 0) {

return numberOnline;

} else {

return 0;

}

Step 6: Build and Deploy Project Session05

Step 7: Tạo Project Web Application với Framework là Struts2 làm các client cho User đăng

ký và đăng nhập

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Step 8: Tạo Entity Class tên UserChat như table UserChat trong package entities (Có

get,set, constructor)

UserChat.java

package entities;

import java.util.Date;

/**

*

* @author Quang

*/

public class UserChat {

private int userID;

private String userName;

private String password;

private Date uCreated;

private String mail;

private String address;

private String phone;

public UserChat() {

}

public int getUserID() {

return userID;

}

public void setUserID(int userID) {

this.userID = userID;

}

public String getUserName() {

return userName;

}

public void setUserName(String userName) {

this.userName = userName;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public Date getuCreated() {

return uCreated;

}

public void setuCreated(Date uCreated) {

this.uCreated = uCreated;

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}

public String getMail() {

return mail;

}

public void setMail(String mail) {

this.mail = mail;

}

public String getAddress() {

return address;

}

public void setAddress(String address) {

this.address = address;

}

public String getPhone() {

return phone;

}

public void setPhone(String phone) {

this.phone = phone;

}

Step 9: Tạo css cho roomchat

Chat.css

.content {

width: 600px;

height: 400px;

overflow: auto;

border: 1px solid #991111;

}

.msg-input {

width: 400px;

border: 1px solid #119911;

}

Step 10: Tạo các trang jsp để cho User đăng ký (register.jsp), đăng nhập (login.jsp) và chat

(roomchat.jsp)

 register.jsp

<%@ page contentType="text/html" pageEncoding="UTF-8"%>

<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE html>

<html>

<head>

<title>Chat Room Register</title>

</head>

<body>

<h2>User Registration</h2>

< s:form action="register" method="Post">

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< s:textfield label="User Name" name="userRegister.userName"/>

< s:password label="Password" name="userRegister.password"/>

< s:textfield label="Mail" name="userRegister.mail"/>

< s:textfield label="Address" name="userRegister.address"/>

< s:textfield label="Phone" name="userRegister.phone"/>

< s:submit value="Register"/>

</ s:form >

</body>

</html>

 login.jsp

<!DOCTYPE html>

<html>

<head>

<title>Login Room Chat</title>

</head>

<body>

<h2>Login</h2>

< s:form action="login" method="Post">

< s:textfield label="User Name" name="userLogin.userName"/>

< s:password label="Password" name="userLogin.password"/>

< s:submit value="Login"/>

</ s:form >

</body>

</html>

 roomchat.jsp

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

<!DOCTYPE html>

< c:if test="${userName == null}">

< c:redirect url="login.jsp" />

</ c:if >

<html>

<head>

</head>

<body>

< s:form action="message" method="post">

Your name: <span id="userName">${userName}</span>

-

Number Online: <span id="userName">${numberOnline}</span>

</div>

<div>

< s:textarea cssClass="msg-input" name="message" label="Input Text Here"/>

< s:submit value="Send" name="send"/>

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</div>

</ s:form >

</body>

</html>

Step 11: Tạo Action Struts 2 thực hiện đăng ký và đăng nhập cho User (gọi qua Enterprise

java Bean S05SingletonBeanRemote)

package action;

import bean.S05SingletonBeanRemote;

import com.opensymphony.xwork2.ActionSupport;

import entities.UserChat;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.interceptor.ServletRequestAware;

/**

*

* @author Quang

*/

public class UserAction extends ActionSupport implements ServletRequestAware{

S05SingletonBeanRemote s05SingletonBean = lookupS05SingletonBeanRemote();

private UserChat userRegister;

private UserChat userLogin;

private HttpServletRequest request;

public UserAction() {

userRegister = new UserChat();

userLogin = new UserChat();

}

public String register() {

String result = null;

try {

result = s05SingletonBean.registerUser(userRegister.getUserName(), userRegister.getPassword(),

userRegister.getMail(), userRegister.getAddress(), userRegister.getPhone());

if (result.equals("Success")) {

return SUCCESS;

}

return ERROR;

}

public String login(){

int numberOnline = 0;

try {

numberOnline = s05SingletonBean.login(userLogin.getUserName(), userLogin.getPassword());

if (numberOnline>0) {

request.getSession().setAttribute("userName", userLogin.getUserName());

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request.getSession().setAttribute("numberOnline", numberOnline);

return SUCCESS;

}

return ERROR;

}

private S05SingletonBeanRemote lookupS05SingletonBeanRemote() {

try {

Context c = new InitialContext();

return (S05SingletonBeanRemote) c.lookup(

"java:global/Session05/Session05-ejb/S05SingletonBean!bean.S05SingletonBeanRemote");

} catch (NamingException ne) {

Logger.getLogger(getClass().getName()).log(Level SEVERE, "exception caught", ne);

throw new RuntimeException(ne);

}

public UserChat getUserRegister() {

return userRegister;

}

public void setUserRegister(UserChat userRegister) {

this.userRegister = userRegister;

}

public UserChat getUserLogin() {

return userLogin;

}

public void setUserLogin(UserChat userLogin) {

this.userLogin = userLogin;

}

public HttpServletRequest getRequest() {

return request;

}

public void setRequest(HttpServletRequest request) {

this.request = request;

}

@Override

public void setServletRequest(HttpServletRequest hsr) {

this.request = hsr;

}

Step 12: Khai báo struts.xml

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd">

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<! Configuration for the default package >

<result name="input">register.jsp</result>

<result name="success">login.jsp</result>

<result name="error">register.jsp</result>

</action>

<result name="success">roomChat.jsp</result>

<result name="error">login.jsp</result>

</action>

</package>

</struts>

 Cấu trúc Project sau khi hoàn thành

Định dạng
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Dung lượng	0,91 MB