简单的日记本系统.doc

Package com.dgy.diary;public interface DiaryInterface void diary_work();String file_work();package com.dgy.diary;import java.io.File;import java.io.FileNotFoundException;import java.io.IOException;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Properties;import java.util.Scanner;public class Diary_write implements DiaryInterface /产生一个文件public String file_work() /以时间来作为保存日记的文件的名字SimpleDateFormat format = new SimpleDateFormat(yyyy-MM-dd);String date = format.format(new Date();File file =new File(D:/Diary/+date+.properties);String result =;/判断文件是否存在if(file.exists()!=true)try file.createNewFile();result= ok; catch (IOException e) e.printStackTrace();else System.out.println(对不起，您今天已经写日记了，请明天继续O(_)O！);result= no;return result;/往文件里面写日记内容public void diary_work() /假如没有写日记if(ok.equals(file_work()Properties pt = new Properties();Scanner sc = new Scanner(System.in);System.out.println(请输入日记标题：);pt.setProperty(title, sc.next();System.out.println(请输入日记心情：);pt.setProperty(mood, sc.next();System.out.println(请输入日记内容：);pt.setProperty(content, sc.next();String date = (new SimpleDateFormat(yyyy-MM-dd).format(new Date();pt.setProperty(date, date);File file =new File(D:/Diary/+date+.properties);PrintWriter pw= null;try pw = new PrintWriter(file); catch (FileNotFoundException e) e.printStackTrace();pt.list(pw);/关闭流pw.close();package com.dgy.diary;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.util.Properties;import java.util.Scanner;public class Diary_read implements DiaryInterface /根据日记名字对对应文件内容public void diary_work()FileInputStream fis = null;Properties pt =new Properties();String path = file_work();if(path!=null)try /fis = new BufferedReader(path);fis =new FileInputStream(path);pt.load(fis);System.out.println(日记标题：+pt.getProperty(title);System.out.println(日记心情：+pt.getProperty(mood);System.out.println(日记内容：+pt.getProperty(content);System.out.println(日记时间：+pt.getProperty(date); catch (FileNotFoundException e) System.out.println(您输入的名字和文件名错误或不存在！);e.printStackTrace(); catch (IOException e) e.printStackTrace();finally try fis.close(); catch (IOException e) e.printStackTrace();else System.out.println(您还没有写日记咧！);/获取要读取的日记名字public String file_work() File file = new File(D:/Diary);String filename=file.list();if(filename.length=0)return null;System.out.println(您已经写好的日记列表有：);for(int i=0;ifilename.length;i+)System.out.println(filenamei);System.out.println(请输入日记的名字，例如：2010-12-25);Scanner sc = new Scanner(System.in);String diaryname = D:/Diary/+sc.next()+.properties;return diaryname;package com.dgy.diary;import java.util.Scanner;public class Menu /1、读日记 2、写日记 3、退出public static DiaryInterface work(int number)if(number=1)return new Diary_read();else if(number=2)return new Diary_write();else if(number=3)System.out.println(退出);return null;elseSystem.out.println(您的输入有误！);return null;public static void main(String args) System.out.println(欢迎使用日记本系统！);System.out.println(1、读日记);System.out.println(2、写日记);System.out.println(3、退出);whi