设计模式试验--适配器模式、装饰模式

1、浙江工商大学计算机与信息工程学院学期上机实验报告课程名称:设计模式姓名:学号:指导教师:班级:日期:【一】实验目的:(1掌握结构型设计模式的意图、使用方法和优缺点,包括适配器模式、装饰模式、外观模式。【二】实验内容:(1 假设某系统中使用了一个第三方的日志记录工具,该日志记录工具支持数据库日志记录DatabaseLog和文本文件记录FileLog两种方式,如图1所示,它提供给的API接口是Write(方法,使用方法如下:Log.Write("Logging Message!" 图1由于某种原因不能继续使用该日志记录工具了,需要采用另外一个日志记录工具,它同样也支持数据库日志

2、记录DatabaseLog和文本文件记录FileLog两种方式,如图2所示,只不过它提供的API接口是WriteLog(方法,使用方法如下:Log.WriteLog("Logging Message!" 图2现要求设计一个解决方案,使得在不修改原有程序的基础上,能实现日志工具的替换。(2Java I/O包的类关系图如图3所示,其中FilterInputSteam为装饰类。要求编写一个装饰者,把输入流内的所有小写字符转换为大写字符。 图3【三】完成报告(预备知识、步骤、程序框图、程序、思考等:第一题UML类图: Java代码: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("数据库日志记录"FileLog.j

4、ava/* author */public class FileLog implements ILog public void write(System.out.println("文本文件记录"Adapter.java/* author */public class Adapter extends LogAdaptee implements ILog public void write(super.writeLog(;System.out.println("适配器转换。"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("转换后的数据库日志记录"FileLogAdaptee.java/* author */public class DatabaseLogAdaptee implements LogAdaptee public void writeLog(System.

6、out.println("转换后的数据库日志记录"第二题UML类图: Java代码: 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