基于Struts+Spring+JDBC架構(gòu)的課程設(shè)計實訓(xùn)教學(xué)示例項目——《網(wǎng)上銀行賬戶管理系統(tǒng)》——利用反射技術(shù)創(chuàng)建通用的工廠類

1、基于Struts+Spring+JDBC架構(gòu)的課程設(shè)計實訓(xùn)教學(xué)例如工程?網(wǎng)上銀行賬戶管理系統(tǒng)?利用反射技術(shù)創(chuàng)立通用的工廠類1.1.1 利用反射技術(shù)創(chuàng)立通用的工廠類1、在工程中添加一個GenerialFactory類1包名稱為，并且繼承類2編程該類package com.px1987.webbank.factory;import java.util.Observable;1987.webbank.config.ClassNameConfig;import com.px1987.webbank.exception.WebBankException;public class GenerialFact

2、ory extends Observable public GenerialFactory() super(); public Object newSomeOneInstance(String someOneClassNameInXML) throws WebBankException Object someOneInstance = null; Class oneClass = null; try oneClass = Class.forName(someOneClassNameInXML); catch (ClassNotFoundException e) int logImpleKind

3、=Integer.parseInt(ClassNameConfig.getProperty("logImpleKind");this.addObserver(LogInfoFactory.newLogInstance(logImpleKind); this.setChanged(); /注意要設(shè)置變化點 notifyObservers(e); /當(dāng)出現(xiàn)異常時將通知各個觀察者 throw new WebBankException("不能正確地獲得" + someOneClassNameInXML + "類"); try someOneI

4、nstance = oneClass.newInstance(); catch (InstantiationException e) int logImpleKind=Integer.parseInt(ClassNameConfig.getProperty("logImpleKind");this.addObserver(LogInfoFactory.newLogInstance(logImpleKind); this.setChanged(); /注意要設(shè)置變化點 notifyObservers(e); /當(dāng)出現(xiàn)異常時將通知各個觀察者 throw new WebBankE

5、xception("不能正確地創(chuàng)立" + someOneClassNameInXML + "類的對象實例"); catch (IllegalAccessException e) int logImpleKind=Integer.parseInt(ClassNameConfig.getProperty("logImpleKind");this.addObserver(LogInfoFactory.newLogInstance(logImpleKind); this.setChanged(); /注意要設(shè)置變化點 notifyObserv

6、ers(e); /當(dāng)出現(xiàn)異常時將通知各個觀察者 throw new WebBankException("不能正確地創(chuàng)立" + someOneClassNameInXML +"類的對象實例"); return someOneInstance; 2、修改TestConnectDBBean類中的有關(guān)代碼package com.px1987.webbank.daotest;import java.sql.Connection;import org.junit.After;import org.junit.Assert;import org.junit.Befor

7、e;import org.junit.Test;import com.px1987.webbank.config.ClassNameConfig;import er.ConnectDBInterface;import com.px1987.webbank.exception.WebBankException;import com.px1987.webbank.factory.GenerialFactory;public class TestConnectDBBean ConnectDBInterface connectDBBean=null;

8、String connectDBBeanClassName=null;Beforepublic void setUp() throws Exception connectDBBeanClassName=ClassNameConfig.getProperty("connectDBBean.className");/connectDBBean=new ConnectDBFactory().newConnectDBBean(connectDBBeanClassName);connectDBBean = (ConnectDBInterface)new GenerialFactory

9、().newSomeOneInstance(connectDBBeanClassName);Afterpublic void tearDown() throws Exception connectDBBean=null;Testpublic void testCloseDBCon()throws WebBankException connectDBBean.closeDBCon();Connection returnDBCon=connectDBBean.getConnection();Assert.assertNull(returnDBCon); /斷言Testpublic void tes

10、tGetConnection() throws WebBankExceptionConnection returnDBCon=connectDBBean.getConnection();Assert.assertNotNull(returnDBCon); /斷言3、執(zhí)行上面的測試用例1.1.2 在UserManageDAOJDBCImple類中應(yīng)用GenerialFactory類1、修改UserManageDAOJDBCImple類中的getConnection()方法public Connection getConnection() throws WebBankException/conne

11、ctDBBean=new ConnectDBFactory().newConnectDBBean(connectDBBeanClassName);connectDBBean = (ConnectDBInterface)new GenerialFactory().newSomeOneInstance(connectDBBeanClassName);con=connectDBBean.getConnection();return con;2、修改TestUserManageDAOJDBCImple類Beforepublic void setUp() throws Exception userMan

12、ageDAOJDBCImpleClassName=ClassNameConfig.getProperty("userManageDAOJDBCImple.className");/oneUserManageDAOJDBCImple=new UserManageDAOFactory().newUserManageDAOBean(userManageDAOJDBCImpleClassName);oneUserManageDAOJDBCImple = (UserManageDAOInterface)new GenerialFactory().newSomeOneInstance(

13、userManageDAOJDBCImpleClassName);3、執(zhí)行該測試用例1.1.3 在AdminUserManageDAOJDBCImple類中中應(yīng)用GenerialFactory類1、修改AdminUserManageDAOJDBCImple類public Connection getConnection() throws WebBankException /connectDBBean=new ConnectDBFactory().newConnectDBBean(connectDBBeanClassName);connectDBBean = (ConnectDBInterfac

14、e)new GenerialFactory().newSomeOneInstance(connectDBBeanClassName);con=connectDBBean.getConnection();return con;2、修改TestAdminUserManageDAOJDBCImple類Beforepublic void setUp() throws Exception adminManageDAOJDBCImpleClassName=ClassNameConfig.getProperty("adminManageDAOJDBCImple.className");/

15、adminUserManageDAOJDBCImple=new AdminUserManageDAOFactory().newAdminManageDAOBean(adminManageDAOJDBCImpleClassName);adminUserManageDAOJDBCImple = (AdminUserManageDAOInterface)new GenerialFactory().newSomeOneInstance(adminManageDAOJDBCImpleClassName);3、執(zhí)行TestAdminUserManageDAOJDBCImple用例類1.1.4 在Accou

16、ntManageDAOJDBCImple類中中應(yīng)用GenerialFactory類1、修改AccountManageDAOJDBCImple類public Connection getConnection() throws WebBankException /connectDBBean=new ConnectDBFactory().newConnectDBBean(connectDBBeanClassName);connectDBBean = (ConnectDBInterface)new GenerialFactory().newSomeOneInstance(connectDBBeanCl

17、assName);con=connectDBBean.getConnection();return con;2、修改TestAccountManageDAOJDBCImple類Beforepublic void setUp() throws Exception accountManageDAOJDBCImpleClassName=ClassNameConfig.getProperty("accountManageDAOJDBCImple.className");/oneAccountManageDAOJDBCImple=new AccountManageDAOFactory

18、().newUserManageDAOBean(accountManageDAOJDBCImpleClassName);oneAccountManageDAOJDBCImple = (AccountManageDAOInterface)new GenerialFactory().newSomeOneInstance(accountManageDAOJDBCImpleClassName);3、執(zhí)行TestAccountManageDAOJDBCImple用例類1.1.5 應(yīng)用泛型技術(shù)完善前面的通用工廠類實現(xiàn)1、添加一個GenericTypeFactory1包名稱為2編程該類package com

19、.px1987.webbank.factory;import java.util.Observable;import com.px1987.webbank.config.ClassNameConfig;987.webbank.exception.WebBankException;public class GenericTypeFactory<GenericType> extends Observable public GenericTypeFactory() public GenericType newSomeOneInstance(String someOneClassNameI

20、nXML) throws WebBankException GenericType someOneInstance = null; Class oneClass = null; try oneClass = Class.forName(someOneClassNameInXML); catch (ClassNotFoundException e) int logImpleKind=Integer.parseInt(ClassNameConfig.getProperty("logImpleKind");this.addObserver(LogInfoFactory.newLo

21、gInstance(logImpleKind); this.setChanged(); /注意要設(shè)置變化點 notifyObservers(e); /當(dāng)出現(xiàn)異常時將通知各個觀察者 throw new WebBankException("不能正確地獲得" + someOneClassNameInXML + "類"); try someOneInstance = (GenericType)oneClass.newInstance(); catch (InstantiationException e) int logImpleKind=Integer.pars

22、eInt(ClassNameConfig.getProperty("logImpleKind");this.addObserver(LogInfoFactory.newLogInstance(logImpleKind); this.setChanged(); /注意要設(shè)置變化點 notifyObservers(e); /當(dāng)出現(xiàn)異常時將通知各個觀察者 throw new WebBankException("不能正確地創(chuàng)立" + someOneClassNameInXML + "類的對象實例"); catch (IllegalAccess

23、Exception e) int logImpleKind=Integer.parseInt(ClassNameConfig.getProperty("logImpleKind");this.addObserver(LogInfoFactory.newLogInstance(logImpleKind); this.setChanged(); /注意要設(shè)置變化點 notifyObservers(e); /當(dāng)出現(xiàn)異常時將通知各個觀察者 throw new WebBankException("不能正確地創(chuàng)立" + someOneClassNameInXML +

24、"類的對象實例"); return someOneInstance; 2、在各個測試用例中應(yīng)用它oneUserManageDAOImple=new GenericTypeFactory<UserManageDAOInterface>().newSomeOneInstance(userDAOBeanClassName);注意：在應(yīng)用該泛型工廠類時，“預(yù)先指定所需要創(chuàng)立的目標(biāo)產(chǎn)品類的類型而不是應(yīng)用常規(guī)的工廠類時，對創(chuàng)立后的目標(biāo)對象的類型進行“事后轉(zhuǎn)換。3、執(zhí)行測試用例的結(jié)果1.1.6 利用泛型方法對前面的GenericTypeFactory類進一步完善1、利用泛型方

25、法設(shè)計一個GenericTypeMethodsFactory類package com.px1987.webbank.factory;import java.util.Observable;import com.px1987.webbank.config.ClassNameConfig;import com.px1987.webbank.exception.WebBankException;public class GenericTypeMethodsFactory extends Observable public GenericTypeMethodsFactory() public <

26、GenericType>GenericType newSomeOneInstance(String someOneClassNameInXML) throws WebBankException GenericType someOneInstance = null; Class oneClass = null; try oneClass = Class.forName(someOneClassNameInXML); catch (ClassNotFoundException e) int logImpleKind=Integer.parseInt(ClassNameConfig.getPr

27、operty("logImpleKind");this.addObserver(LogInfoFactory.newLogInstance(logImpleKind); this.setChanged(); /注意要設(shè)置變化點 notifyObservers(e); /當(dāng)出現(xiàn)異常時將通知各個觀察者 throw new WebBankException("不能正確地獲得" + someOneClassNameInXML + "類"); try someOneInstance = (GenericType)oneClass.newInstance(); catch (InstantiationException e