設(shè)計模式試驗--適配器模式、裝飾模式

1、浙江工商大學(xué)計算機(jī)與信息工程學(xué)院學(xué)期上機(jī)實驗報告課程名稱:設(shè)計模式姓名:學(xué)號:指導(dǎo)教師:班級:日期:【一】實驗?zāi)康?(1掌握結(jié)構(gòu)型設(shè)計模式的意圖、使用方法和優(yōu)缺點,包括適配器模式、裝飾模式、外觀模式。【二】實驗內(nèi)容:(1 假設(shè)某系統(tǒng)中使用了一個第三方的日志記錄工具,該日志記錄工具支持?jǐn)?shù)據(jù)庫日志記錄DatabaseLog和文本文件記錄FileLog兩種方式,如圖1所示,它提供給的API接口是Write(方法,使用方法如下:Log.Write("Logging Message!" 圖1由于某種原因不能繼續(xù)使用該日志記錄工具了,需要采用另外一個日志記錄工具,它同樣也支持?jǐn)?shù)據(jù)庫日志

2、記錄DatabaseLog和文本文件記錄FileLog兩種方式,如圖2所示,只不過它提供的API接口是WriteLog(方法,使用方法如下:Log.WriteLog("Logging Message!" 圖2現(xiàn)要求設(shè)計一個解決方案,使得在不修改原有程序的基礎(chǔ)上,能實現(xiàn)日志工具的替換。(2Java I/O包的類關(guān)系圖如圖3所示,其中FilterInputSteam為裝飾類。要求編寫一個裝飾者,把輸入流內(nèi)的所有小寫字符轉(zhuǎn)換為大寫字符。 圖3【三】完成報告(預(yù)備知識、步驟、程序框圖、程序、思考等:第一題UML類圖: Java代碼:ClientDemo.java/* author

3、*/public class ClientDemo public static void main (String args ILog newLog = new Adapter(;newLog.write(;ILog.java/* author */public interface ILog public void write(;DatabaseLog.java/* author */public class DatabaseLog implements ILog public void write(System.out.println("數(shù)據(jù)庫日志記錄"FileLog.j

4、ava/* author */public class FileLog implements ILog public void write(System.out.println("文本文件記錄"Adapter.java/* author */public class Adapter extends LogAdaptee implements ILog public void write(super.writeLog(;System.out.println("適配器轉(zhuǎn)換。"LogAdaptee.java/* author */public interfac

5、e LogAdaptee public void writeLog(;DatabaseLogAdaptee.java/* author */public class DatabaseLogAdaptee implements LogAdaptee public void writeLog(System.out.println("轉(zhuǎn)換后的數(shù)據(jù)庫日志記錄"FileLogAdaptee.java/* author */public class DatabaseLogAdaptee implements LogAdaptee public void writeLog(System.

6、out.println("轉(zhuǎn)換后的數(shù)據(jù)庫日志記錄"第二題UML類圖: Java代碼: ClientDemo.java /* author * */public class ClientDemopublic static void main (String argsInputStream newInput = new StringBufferInputStream(; BufferInputStream newBuffer = newBufferInputStream(newInput;ToUpperCaseInputStream newToUpperCase = new T

7、oUpperCaseInputStream(newBuffer;newToUpperCase.read(;InputStream.java/* author */public interface InputStream public void read(;FileInputStream.java/* author *public class FileInputStream implements InputStream public void read( System.out.println("FileInputStream!"ByteArrayInputStream.jav

8、a/* author */public class ByteArrayInputStream implements InputStream public void read( System.out.println("ByteArrayInputStream!"StringBufferInputStream.java/* author */public class StringBufferInputStream implements InputStream public void read( System.out.println("StringBufferInput

9、Stream!"FilterInputStream.java/* author */public class FilterInputStream implements InputStream public void read( System.out.println("FilterInputStream!"DataInputStream.java/* author * * */ public class DataInputStream extends FilterInputStream public DataInputStream(InputStream input

10、Stream super(inputStream; public void read( super.read(; System.out.println("DataInputStream!" BufferInputStream.java /* * author * * */ public class BufferInputStream extends FilterInputStream public BufferInputStream (InputStream inputStream super(inputStream; public void read( super.rea

11、d(; System.out.println("BufferInputStream!" LineNumberInputStream.java /* * author * * */ public class LineNumberInputStream extends FilterInputStream public LineNumberInputStream (InputStream inputStream super(inputStream; public void read( super.read(; System.out.println("LineNumberInputStream!" ToUpperCaseInputStream.java /* * author * * */ public class ToUpperCaseInputStream extends Filter