Thực hành EJB (Enterprise Java Bean) Lab 3 + 4

IT Research Department @BKAP 2015 Page 1 / 26 Lab 03 + 04 Session Beans Stateful Session Beans Mục tiêu - Thao tác session bean Stateless với DataBase - Thao tác session bean Stateful

IT Research Department @BKAP 2015 Page 1 / 26

Lab 03 + 04

Session Beans Stateful Session Beans Mục tiêu

- Thao tác session bean Stateless với DataBase

- Thao tác session bean Stateful với DataBase

Phần I Bài tập step by step

Bài 1

Tạo project EJB với Session Bean Stateless có interface là Local làm việc với DataBase EJB

có bảng sau:

Book

Project thực hiện các công việc sau:

- Tạo class Book tương ứng với bảng Book trong CSDL

- Tạo Session Bean Stateless Local gồm các phương thức sau:

+ insertBook: thêm thông tin vào bảng Book

+ countBook: Trả về số sách thỏa mãn điều kiện giá sách nằm trong khoảng 200000

và 500000

+ searchByName: Trả về danh sách sách có Title bắt đầu bằng ký tự “S” (Cho phép gọi Asynchronous)

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

insertBook, countBook, searchByName

 Tạo Database EJB và Table Book

CreateDataBaseEJB

go

UseEJB

go

CREATETABLE[dbo].[Book](

[BookID][int]IDENTITY(1,1)NOTNULL,

[Title][nvarchar](200)NOTNULL,

[Author][nvarchar](50)NOTNULL,

[Price][float]NOTNULL,

[Publisher][nvarchar](100)NULL,

[Picture][nvarchar](100)NULL,

CONSTRAINT[PK_Book]PRIMARYKEYCLUSTERED

(

[BookID]ASC

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

ON,ALLOW_PAGE_LOCKS=ON)ON[PRIMARY]

IT Research Department @BKAP 2015 Page 3 / 26

SELECT@count=count(*)FROMBookWHEREPriceBETWEEN@price1AND@price2

Step 2: Tạo Project EJB tên Session03_04 với Session Bean là Stateless (tên

S03_04StatelessBean) và Interface là Local (Như đã hướng dẫn ở Lab 01 + 02)

 Cấu trúc ứng dụng sau khi hoàn thành

Step 3: Tạo lớp Book.java tương ứng với bảng Book trong CSDL (có constructor và get,set)

 Session03_04-ejb  Source Packages  New  Other  Java  Java Class

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public class Book {

private int bookID;

private String title;

private String author;

private float price;

private String publisher;

private String picture;

public Book(int bookID, String title, String author, float price, String publisher, String picture) {

this.bookID = bookID;

this.title = title;

this.author = author;

this.price = price;

this.publisher = publisher;

this.picture = picture;

}

public int getBookID() {

return bookID;

}

public void setBookID(int bookID) {

this.bookID = bookID;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getAuthor() {

return author;

}

public void setAuthor(String author) {

this.author = author;

}

public float getPrice() {

return price;

}

public void setPrice(float price) {

this.price = price;

}

public String getPublisher() {

return publisher;

}

public void setPublisher(String publisher) {

this.publisher = publisher;

}

public String getPicture() {

return picture;

}

public void setPicture(String picture) {

this.picture = picture;

public interface S03_04StatelessBeanLocal {

String insertBook(String title, String author, float price, String publisher, String picture);

int countBook(float price1, float price2);

List<Book> searchByName(String titleStartWith);

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public class S03_04StatelessBean implements S03_04StatelessBeanLocal {

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 = "1234$";

private static Connection getDBConnection() {

Connection conn = null;

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

} catch (SQLException ex) {

public String insertBook(String title, String author, float price, String publisher, String picture) {

Connection conn = null;

CallableStatement callableStatement = null;

public int countBook(float price1, float price2) {

Connection conn = null;

CallableStatement callableStatement = null;

Connection conn = null;

CallableStatement callableStatement = null;

List<Book> listBook = new ArrayList<Book>();

Step 6: Tạo các trang jsp để test các chức năng thực hiện trên Session Bean

 Index.jsp: Chọn các chức năng cần test

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

<!DOCTYPEhtml>

<html>

<head>

<metahttp-equiv="Content-Type"content="text/html; charset=UTF-8">

<title>Book Page</title>

</head>

<body>

<h1>List Function Test</h1>

<ahref="insertBook.jsp">Insert Book</a><br>

<ahref="countBook.jsp">Count Book</a><br>

<ahref="searchByName.jsp">Search By Name</a><br>

</body>

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</html>

 insertBook.jsp: Nhập liệu các thông tin Book để Insert

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

<!DOCTYPEhtml>

<html>

<head>

<metahttp-equiv="Content-Type"content="text/html; charset=UTF-8">

<title>Insert Book Page</title>

</head>

<body>

<h1>Insert Book</h1>

<formaction="S03_04Servlet"method="Post">

Title:<inputtype="text"name="title"/><br>

Author:<inputtype="text"name="author"/><br>

Price:<inputtype="text"name="price"/><br>

Publisher:<inputtype="text"name="publisher"/><br>

Picture:<inputtype="text"name="picture"/><br><br>

<inputtype="submit"name="insertBook"value="InsertBook">

</form>

</body>

</html>

 countBook.jsp: Nhập đếm số Book có mức giá từ bao nhiêu đến bao nhiêu

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

<!DOCTYPEhtml>

<html>

<head>

<metahttp-equiv="Content-Type"content="text/html; charset=UTF-8">

<title>Count Book Page</title>

</head>

<body>

<h1>Count Book</h1>

<formaction="S03_04Servlet"method="Post">

Price From:<inputtype="text"name="price1"/><br>

Price To:<inputtype="text"name="price2"/><br><br>

<inputtype="submit"name="countBook"value="CountBook">

</form>

</body>

</html>

 searchByName.jsp: Nhập chữ bắt đầu của title Book muốn tìm kiếm

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

<!DOCTYPEhtml>

<html>

<head>

<metahttp-equiv="Content-Type"content="text/html; charset=UTF-8">

<title>Search By Name Page</title>

</head>

<body>

<h1>Search By Name</h1>

<formaction="S03_04Servlet"method="Post">

Title Start With:<inputtype="text"name="titleStartWith"/><br><br>

<inputtype="submit"name="titleStartWith"value="Search">

</form>

</body>

</html>

 listBook.jsp: Hiển thị danh sách Book

<%@ pageimport="java.util.ArrayList"%>

<%@ pageimport="entities.Book"%>

<%@ pageimport="java.util.List"%>

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

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

<%

Object sessionObj = request.getSession().getAttribute("listBook");

List<Book> listBook = new ArrayList<Book>();

listBook = (List<Book>) sessionObj;

%>

<!DOCTYPEhtml>

<html>

<head>

<metahttp-equiv="Content-Type"content="text/html; charset=UTF-8">

<title>List Books</title>

</head>

<body>

<divalign="center">

<tableborder="1"cellpadding="5">

<caption><h2>List of Books</h2></caption>

<td>< c:outvalue="${book.bookID}" /></td>

<td>< c:outvalue="${book.title}" /></td>

<td>< c:outvalue="${book.author}" /></td>

<td>< c:outvalue="${book.price}" /></td>

<td>< c:outvalue="${book.publisher}" /></td>

<td>< c:outvalue="${book.picture}" /></td>

Step 7: Tạo servlet S03_04Servlet trong thư mục servlet trên Session03_04-war Sau đó gọi

S03_04StatelessBean (Như bài Lab 01 + 02 đã hướng dẫn)

package servlet;

import bean.S03_04StatelessBeanLocal;

import entities.Book;

import java.io.IOException;

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* @param request servlet request

* @param response servlet response

* @throws ServletException if a servlet-specific error occurs

* @throws IOException if an I/O error occurs

*/

protected void processRequest(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/html;charset=UTF-8");

try (PrintWriter out = response.getWriter()) {

/* TODO output your page here You may use following sample code */

if (request.getParameter("insertBook")!=null) {

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

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

float price = Float.parseFloat(request.getParameter("price"));

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

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

String returnStr = s03_04StatelessBean.insertBook(title, author, price, publisher, picture);

}else if (request.getParameter("countBook")!=null) {

float price1 = Float.parseFloat(request.getParameter("price1"));

float price2 = Float.parseFloat(request.getParameter("price2"));

int returncount = s03_04StatelessBean.countBook(price1, price2);

out.println("<h1>Count Book: "+returncount+"</h1>");

}

else {

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

List<Book> listBook = s03_04StatelessBean.searchByName(titleStartWith);

request.setAttribute("listBook", listBook);

RequestDispatcher rd = getServletContext().getRequestDispatcher("/listBook.jsp");

* @param request servlet request

* @param response servlet response

* @throws ServletException if a servlet-specific error occurs

* @throws IOException if an I/O error occurs

*/

@Override

protected void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

* @param request servlet request

* @param response servlet response

* @throws ServletException if a servlet-specific error occurs

* @throws IOException if an I/O error occurs

*/

@Override

protected void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

public String getServletInfo() {

return "Short description";

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<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">

<servlet>

<servlet-name>S03_04Servlet</servlet-name>

<servlet-class>servlet.S03_04Servlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>S03_04Servlet</servlet-name>

<url-pattern>/S03_04Servlet</url-pattern>

Step 9: Add sqljdbc4.jar vào thư mục Libraries của Session03_04-ejb

 Session03_04-ejb  Libraries  Add JAR/Folder  chọn đến sqljdbc4.jar

Step 10: Build, Deploy and Run Application

 Insert Book

 Count Book

IT Research Department @BKAP 2015 Page 15 / 26

 Search By Name

Bài 2

Phát triển tiếp bài 1, tạo Session Bean Stateful với interface là Remote gồm các phương thức sau

- getBooks(): Trả về tất cả sách

- addBasket(BookID): Lưu BookID vào một List mỗi khi addBasket được gọi

- getBasket(): Trả về List of Book

Step 1: Tạo các procedure thực hiện nghiệp vụ lấy tất cả sách trong bảng Book

Step 2: Tạo Interface Stateful_Interface (Như Lab 01 + 02)

Step 3: Tạo lớp Book.java tương ứng với bảng Book trong CSDL (có constructor và get,set)

trong package entity của interface Stateful_Interface

public class Book {

private int bookID;

private String title;

private String author;

private float price;

private String publisher;

private String picture;

public Book(int bookID, String title, String author, float price, String publisher, String picture) {

this.bookID = bookID;

this.title = title;

this.author = author;

this.price = price;

this.publisher = publisher;

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this.picture = picture;

public void setBookID(int bookID) {

this.bookID = bookID;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getAuthor() {

return author;

}

public void setAuthor(String author) {

this.author = author;

}

public float getPrice() {

return price;

}

public void setPrice(float price) {

this.price = price;

}

public String getPublisher() {

return publisher;

}

public void setPublisher(String publisher) {

this.publisher = publisher;

}

public String getPicture() {

return picture;

}

public void setPicture(String picture) {

this.picture = picture;

}

}

Step 4: Tạo Session Bean Statefull với interface Remote tới interface Stateful_Interface