软件设计与体系结构复习整理题目及答案(8)

1．目标（Target） : ThreeElectricOutlet.java public interface ThreeElectricOutlet{

public abstract void connectElectricCurrent(); }

2．被适配者（Adaptee）: TwoElectricOutlet.java

public interface TwoElectricOutlet{

public abstract void connectElectricCurrent(); }

3．适配器（Adapter） TreeElectricAdapter.java

public class TreeElectricAdapter implements ThreeElectricOutlet{ TwoElectricOutlet outlet;

TreeElectricAdapter(TwoElectricOutlet outlet){ this.outlet=outlet; }

public void connectElectricCurrent(){ outlet.connectElectricCurrent(); } }

4．应用 Application.java_1 public class Application{

public static void main(String args[]){ ThreeElectricOutlet outlet;

Wash wash=new Wash(); outlet=wash;

System.out.println(\使用三相插座接通电流：\ outlet.connectElectricCurrent();

TV tv=new TV();

TreeElectricAdapter adapter=new TreeElectricAdapter(tv); outlet=adapter;

System.out.println(\使用三相插座接通电流：\ outlet.connectElectricCurrent(); } }

4．应用 Application.java_2

class Wash implements ThreeElectricOutlet{ String name; Wash(){

name=\黄河洗衣机\ }

Wash(String s){ name=s;

}

public void connectElectricCurrent(){ turnOn(); }

public void turnOn(){

System.out.println(name+\开始洗衣物。\ } }

4．应用 Application.java_3

class TV implements TwoElectricOutlet{ String name; TV(){

name=\长江电视机\ }

TV(String s){ name=s; }

public void connectElectricCurrent(){ turnOn(); }

public void turnOn(){

System.out.println(name+\开始播放节目。\ } }

———————————————————————————————————————

外观模式

模式的结构中包括两种角色： 子系统（Subsystem） 外观（Facade）

1．子系统（Subsystem）_1 : CheckWord.java public class CheckWord{

public final int basicAmount=85; String advertisement; int amount;

public CheckWord(String advertisement){ this.advertisement=advertisement; }

public void setChargeAmount(){

amount=advertisement.length()+basicAmount; //计算出计费字符数目 }

public int getAmount(){ return amount; } }

1．子系统（Subsystem）_2 : Charge.java public class Charge{

public final int basicCharge=12; CheckWord checkWord;

Charge(CheckWord checkWord){ this.checkWord=checkWord; }

public void giveCharge(){

int charge=checkWord.getAmount()*basicCharge; System.out.println(\广告费用:\元\ } }

1．子系统（Subsystem）_3 :TypeSeting.java public class TypeSeting{ String advertisement;

public TypeSeting(String advertisement){ this.advertisement=advertisement; }

public void typeSeting(){

System.out.println(\广告排版格式:\ System.out.println(\ System.out.println(advertisement); System.out.println(\ } }

2．外观（Facade）: ClientServerFacade.java public class ClientServerFacade{ private CheckWord checkWord; private Charge charge;

private TypeSeting typeSeting;

String advertisement;

public ClientServerFacade(String advertisement){ this.advertisement=advertisement;

checkWord=new CheckWord(advertisement); charge=new Charge(checkWord);

typeSeting=new TypeSeting(advertisement); }

public void doAdvertisement(){ checkWord.setChargeAmount(); charge.giveCharge(); typeSeting.typeSeting(); }

}3．应用 Application.java public class Application{

public static void main(String args[]){ ClientServerFacade clientFacade;

String clientAdvertisement=\鹿花牌洗衣机，价格2356元，联系电话：1234567\ clientFacade=new ClientServerFacade(clientAdvertisement); clientFacade.doAdvertisement(); } }

课件里有关架构的几个具体例子，比如do it all程序的重构方法，计算应收账款（Revenue Recognition）的不同设计方法

Do it all:

public class DoItAll extends javax.servlet.http.HttpServlet { protected void doGet( HttpServletRequest request, HttpServletResponse response) throws ... // { String lastName = request.getParameter(“…\

Connection dbc = DbRegistry.getDbConnection();

String findSql = \ PreparedStatement dbQuery = dbc.prepareStatement(findSql); dbQuery.setString(1, lastName);

ResultSet rs = dbQuery.executeQuery(); rs.next();

String firstName = rs.getString(\lastName = lastName.toUpperCase();

PrintWriter out = response.getWriter(); response.setContentType(\

out.println(\

}

}

计算应收账款（Revenue Recognition）PPT9 175页

概念模型：