Thực hành Web Services Lab 3 + 4

Enterprise Application Development in Java EE

Lab 03 - 04
Web Service Endpoints
Designing Web Service Clients
Mục tiêu
- Xây dựng web service thanh toán
- Xây dựng Client test các dịch vụ

Phần I Bài tập step by step
Bài 1
Cho cơ sở dữ liệu thanh toán ngân hàng BankDB

 AccountBank

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 Merchant

 TransactionBank

Xây dựng các dịch vụ:
 CheckOrder: Kiểm tra tính chính xác của tài khoản, số dư khả dụng của tk khách hàng
 FinishOrder: Thực hiện thanh toán cho khách hàng, trừ số tiền tài khoản khách hàng và

cộng vào tài khoản được thanh toán
Xây dựng client thực hiện test các dịch vụ

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Step 1: Xây dựng các procedure thực hiện nghiệp vụ của các dịch vụ
USE [BankDB]
GO
============================================
-- Author:
Quangnd
-- Create date: 20161109
-- Description: Dich vu CheckOrder
-- =============================================
CREATE PROCEDURE [dbo].[CheckOrder]
@merchantName nvarchar(50),
@accNo nvarchar(30),
@accountName nvarchar(50),
@paymentAmount float,
@returncode char(2) OUTPUT,
@transactionId int OUTPUT
AS
BEGIN
--Kiem tra tat ca dieu kien xem co thanh toan duoc hay khong

Declare @checkMerchant int;
Declare @merchantId int;
Declare @accountid int;
Select @checkMerchant = count(*) from Merchant m where m.MerchantName = @merchantName and
m.Status = 1;
If @checkMerchant > 0
BEGIN
--lay merchantid tu @merchantName truyen vao
Select @merchantId = m.MerchantId from Merchant m;
Declare @checkAcc int;
--Kiem tra tai khoan co ton tai hay khong
Select @checkAcc = count(*) from AccountBank a where a.AccName = @accountName and a.AccNo =
@accNo and a.Status = 1;
if @checkAcc>0
BEGIN
--Tai khoan ton tai --> Kiem tra so du kha dung cua tai khoan co du thanh toan hay khong
----Lay ma tai khoan
Select @accountid = a.AccountId from AccountBank a;
----Kiem tra so du kha dung
Declare @checkAvailableBalance int;
Select @checkAvailableBalance = count(*) from AccountBank a where a.AccountId =
@accountid and a.AvailableBalance>@paymentAmount;
if @checkAvailableBalance>0
set @returncode = '00';
else
set @returncode = '03';
END
else
set @returncode = '02';
END

else
Set @returncode = '01';
--Neu dieu kien thoa man, tao ban ghi trong transaction
if @returncode = '00'

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BEGIN
Insert into TransactionBank
values(@merchantId,@accountid,@paymentAmount,GETDATE(),N'Thanh toán cho trang web rau
sạch',0);
Commit;
Declare @maxTrans int;
Select @maxTrans = max(t.TransachtionId) from TransactionBank t;
Set @transactionId = @maxTrans;
END
else
Set @transactionId = 0;
END

 FinishOrder
USE [BankDB]
GO
--=============================================

-- Author:
Quangnd
-- Create date: 20161109
-- Description: Dich vu FinishOrder
-- =============================================
CREATE PROCEDURE [dbo].[FinishOrder]
@transactionId int,
@merchantName nvarchar(50),
@returnCode char(2) OUTPUT
AS
BEGIN
--Kiem tra co transaction khong
Declare @checkTransaction int;
Declare @accountIdKH int;
Declare @accountIdWeb int;
--lay tai khoan cua trang web
Select @accountIdWeb = m.AccountId from Merchant m where m.MerchantName = @merchantName;
Declare @paymentAmount float;
Select @checkTransaction = count(*) from TransactionBank t where t.TransachtionId = @transactionId;
if @checkTransaction>0
BEGIN

Select @paymentAmount = t.BalancePayment from TransactionBank t where t.TransachtionId =
@transactionId;
Select @accountIdKH = t.AccountId from TransactionBank t where t.TransachtionId = @transactionId;
--Kiem tra lai so du kha dung
Declare @checkSDKD int;
Select @checkSDKD = count(*) from AccountBank a where a.AccountId = @accountIdKH and
a.AvailableBalance>@paymentAmount;
if @checkSDKD>0

BEGIN
--Cong vao so du tk Web
Declare @amountWeb float;
Declare @updateWeb float;
Select @amountWeb = a.AvailableBalance from AccountBank a where a.AccountId =
@accountIdWeb;

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Set @updateWeb = @amountWeb + @paymentAmount;
Update AccountBank
Set AvailableBalance = @updateWeb
Where AccountId = @accountIdWeb;
--Tru vao so du tk KH
Declare @amountKH float;
Declare @updateKH float;
Select @amountKH = a.AvailableBalance from AccountBank a where a.AccountId =
@accountIdKH;
Set @updateKH = @amountKH - @paymentAmount;
Update AccountBank
Set AvailableBalance = @updateKH
Where AccountId = @accountIdKH;
--Cap nhat trang thai cua Transaction
Update TransactionBank

Set Status = 1
Where TransachtionId = @transactionId;
--Tra ve returncode
Set @returnCode = '00'
END
Else
-- So du khong du de thanh toan
set @returnCode = '02';
END
Else
--Khong ton tai transaction
set @returnCode = '01';
END

Step 2: Tạo Web Application
 File  New Project  Java Web  Web Application
 Project Name: PaymentApp
 Server: GlassFish Server
Step 3: Tạo lớp java ConnectionDB.java để kết nối cơ sở dữ liệu
 PaymentApp  New  Other  Java  Java Class
 Class Name: ConnectionDB
 Package: util
 ConnectionDB.java

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package util;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
*
* @author Quang
*/
public class ConnectionDB {
private static final String URL = "jdbc:sqlserver://localhost:1433;databaseName=BankDB";
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 openConnection() {
Connection conn = null;
try {
Class.forName(DB_DRIVER);
} catch (ClassNotFoundException ex) {
Logger.getLogger(ConnectionDB.class.getName()).log(Level.SEVERE, null, ex);
}
try {
conn = DriverManager.getConnection(URL, user_db, pass_db);
} catch (SQLException ex) {
Logger.getLogger(ConnectionDB.class.getName()).log(Level.SEVERE, null, ex);
}

return conn;
}
public static void closeConnection(Connection conn, CallableStatement callableSt) {
if (conn != null) {
try {
conn.close();
} catch (SQLException ex) {
Logger.getLogger(ConnectionDB.class.getName()).log(Level.SEVERE, null, ex);
}
}
if (callableSt != null) {
try {
callableSt.close();
} catch (SQLException ex) {
Logger.getLogger(ConnectionDB.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}

Step 4: Tạo Web Service PaymentWebService
 PaymentApp  New  Other  Web Services  Web Service
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 Web Service Name: PaymentWebService
 Package: ws
 Chọn Create Web Service from Scratch
 Tạo các dịch vụ cho PaymentWebService
 CheckOrder
 FinishOrder
 PaymentWebService.java
package ws;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.Types;
import javax.jws.WebService;
import javax.jws.WebMethod;
import util.ConnectionDB;
/**
*
* @author Quang
*/
@WebService(serviceName = "PaymentWebservice")
public class PaymentWebservice {
/**
* Web service operation
*
* @param merchantName
* @param accNo
* @param accName
* @param paymentAmount
* @return
*/
@WebMethod(operationName = "checkOrder")

public String checkOrder(String merchantName, String accNo, String accName, float paymentAmount) {
Connection conn = null;
String returnSt = "";
CallableStatement callableSt = null;
try {
conn = ConnectionDB.openConnection();
callableSt = conn.prepareCall("{call CheckOrder(?,?,?,?,?,?)}");
callableSt.setString(1, merchantName);
callableSt.setString(2, accNo);
callableSt.setString(3, accName);
callableSt.setFloat(4, paymentAmount);

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callableSt.registerOutParameter(5, Types.CHAR);
callableSt.registerOutParameter(6, Types.INTEGER);
callableSt.execute();
String returnCode = callableSt.getString(5);
int transactionId = callableSt.getInt(6);
returnSt = returnCode + "#" + transactionId;
} catch (Exception e) {
e.printStackTrace();
}
return returnSt;

}
public String finishOrder(int transactionid, String merchantName) {
Connection conn = null;
String returnSt = "";
CallableStatement callableSt = null;
try {
conn = ConnectionDB.openConnection();
callableSt = conn.prepareCall("{call FinishOrder(?,?,?)}");
callableSt.setInt(1, transactionid);
callableSt.setString(2, merchantName);
callableSt.registerOutParameter(3, Types.CHAR);
callableSt.execute();
returnSt = callableSt.getString(3);
} catch (Exception e) {
e.printStackTrace();
}
return returnSt;
}
}

 Ứng dụng sau khi hoàn thành

Step 5: Build, Deploy and Test Web Service

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 Chuẩn bị dữ liệu Test

 Test Web Service

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Phần II Bài Tập Tự Làm
Bài 2: Xây dựng ứng dụng thực hiện thanh toán chuyển khoản để test các dịch vụ của
web service trong bài 1 đã xây dựng

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