学校Java课的课程实验之一。
用到的数据结构：哈希表
题目要求：
1. 建立的图书类包含如下信息：编号、书名、作者、出版社、出版日期。
2. 能够实现根据以下关键字查询图书：编号、书名、作者、出版社。
3. 能够实现图书信息的录入、删除和修改。
4.录入的图书至少要有10本以上。
5.具有图形用户界面.
功能介绍：
录入、删除、修改图书；
按编号、书名、作者、出版社查询图书。
界面设计：
主界面（会的不多，所以用了最简易的流式布局）：
检索模块：
从四个检索字段中选择一种，输入检索词，点击“检索”按钮后会在右边的文本框中显示检索到的内容。
录入/修改模块：
在主窗口中点击“录入”，可在弹出的“录入对话框”中输入图书信息，点击“确定”后，录入的信息将显示在状态框里，并且在图书列表中追加了新录入的图书。
删除模块：
在主窗口中点击“删除”，可在弹出的“删除对话框”中输入书名，点击“确定”后，该名字的图书将从图书馆删除。
类的设计：
MyDate类 被Book类引用
Book类 被Library类引用
Library类 被Gui类引用
Gui类 图形界面，引用以上三个类
辅助类MyDate的实现
1 public class MyDate
2 {
3 //data members
4 private int year;
5 private int month;
6 private int day;
7 //methods
8 public MyDate(){this(1995,2,28);}
9 public MyDate(int year, int month, int day)
10 {
11 this.year = year;
12 this.month = month;
13 this.day = day;
14 }
15 public void set_year(int year)
16 {
17 this.year = year;
18 }
19 public void set_month(int month)
20 {
21 this.month = month;
22 }
23 public void set_day(int day)
24 {
25 this.day = day;
26 }
27
28 public void set_date(int year, int month, int day)
29 {
30 this.year = year;
31 this.month = month;
32 this.day = day;
33 }
34
35 public int get_year()
36 {
37 return year;
38 }
39 public int get_month()
40 {
41 return month;
42 }
43 public int get_day()
44 {
45 return day;
46 }
47
48 public String toString()
49 {
50 return (year+"/"+month+"/"+day);
51 }
52 }
MyDate.java
书类Book的实现
1 import java.util.*;
2 public class Book{
3 static int count=0;
4 private int num;
5 private String title;
6 private Vector<String> author;
7 private String publisher;
8 private MyDate date;
9
10 public int getNum()
11 {return num;}
12 public String getTitle()
13 {return title;}
14 public Vector<String> getAuthor()
15 {return author;}
16 public String getPublisher()
17 {return publisher;}
18 public MyDate getDate()
19 {return date;}
20
21 //can not set num
22 public void setTitle(String title)
23 {this.title=title;}
24 private void setAuthor(Vector<String> author)
25 {this.author=author;}
26 public void setPublisher(String publisher)
27 {this.publisher=publisher;}
28 public void setDate(MyDate date)
29 {this.date=date;}
30
31 public Book()
32 {
33 this("???","???",new MyDate());
34 count++;
35 this.num=count;
36 }
37 public Book(String title, String publisher, MyDate date)
38 {
39 count++;
40 this.num=count;
41 this.title=title;
42 this.author=new Vector<String>();
43 this.publisher=publisher;
44 this.date=date;
45 }
46
47 @Override
48 public String toString()
49 {
50 return (num+"\\"+title+"\\"+author+"\\"+publisher+"\\"+date+"\n");
51 }
52
53 public void addAuthor(String anAuthor)
54 {author.add(anAuthor);}
55 }
Book.java
图书馆类Library.java
1 import java.util.*;
2 public class Library{
3 private Hashtable<Integer, Book> numList;//num is unique, and the other three are probably not
4 private Hashtable<String, Book> titleList;//regard the books with the same name different
5 private Hashtable<String, Vector<Book>> authorList;
6 private Hashtable<String, Vector<Book>> publisherList;
7
8 public Library()
9 {
10 numList=new Hashtable<Integer, Book>();
11 titleList=new Hashtable<String, Book>();
12 authorList=new Hashtable<String, Vector<Book>>();
13 publisherList=new Hashtable<String, Vector<Book>>();
14 }
15
16 @Override
17 public String toString()
18 {
19 return ("图书馆现有 "+numList.size()+" 本书");
20 }
21
22 public void addBook(Book aBook)
23 {
24 numList.put(new Integer(aBook.getNum()),aBook);
25
26 titleList.put(aBook.getTitle(),aBook);
27
28 for(String anAuthor: aBook.getAuthor())
29 {
30 if(!authorList.containsKey(anAuthor))
31 authorList.put(anAuthor, new Vector<Book>());
32 (authorList.get(anAuthor)).add(aBook);
33 }
34
35 if(!publisherList.containsKey(aBook.getPublisher()))
36 publisherList.put(aBook.getPublisher(), new Vector<Book>());
37 (publisherList.get(aBook.getPublisher())).add(aBook);
38 }
39
40 private void removeBook(Book aBook)
41 {//be called by the same name public method
42 numList.remove(new Integer(aBook.getNum()));
43
44 titleList.remove(aBook.getTitle());
45
46 (publisherList.get(aBook.getPublisher())).remove(aBook);
47 if((publisherList.get(aBook.getPublisher())).isEmpty())
48 publisherList.remove(aBook.getPublisher());
49
50 for(String anAuthor: aBook.getAuthor())
51 {
52 (authorList.get(aBook.getAuthor())).remove(aBook);
53 if((authorList.get(aBook.getAuthor())).isEmpty())
54 authorList.remove(aBook.getAuthor());
55 }
56 }
57
58 public String removeBook(String aTitle)
59 {
60 String result="";
61 if(titleList.get(aTitle)==null)
62 {
63 result="这本书不存在";
64 }
65 else
66 {
67 result="您已经删除 "+titleList.get(aTitle).toString();
68 removeBook(titleList.get(aTitle));//call the function with the same name
69 }
70 return result;
71 }
72 public String modifyBook(String aTitle,String anAuthor,String aPublisher,MyDate aDate)
73 {
74 titleList.get(aTitle).addAuthor(anAuthor);
75 titleList.get(aTitle).setPublisher(aPublisher);
76 titleList.get(aTitle).setDate(aDate);
77 String result="您已经修改 "+titleList.get(aTitle).toString();
78 return result;
79 }
80
81
82 public String listBooksWithNum(int aNum)
83 {
84 String result="";
85 Book book=numList.get(aNum);
86 result+=book;
87 return result;
88 }
89 public String listBooksWithTitle(String aTitle)
90 {
91 String result="";
92 Book book=titleList.get(aTitle);
93 result+=book;
94 return result;
95 }
96 public String listBooksWithTitle()
97 {
98 String result="";
99 Enumeration<String> titles=titleList.keys();
100 while(titles.hasMoreElements())
101 {result+=titles.nextElement();}
102 return result;
103 }
104 public String listBooksWithAuthor(String anAuthor)
105 {
106 String result="";
107 Iterator<Book> books=(authorList.get(anAuthor)).iterator();
108 while(books.hasNext())
109 {result+=books.next();}
110 return result;
111 }
112 public String listBooksWithPublisher(String aPublisher)
113 {
114 String result="";
115 Vector<Book> books=publisherList.get(aPublisher);
116 for(Book book: books)
117 result+=book;
118 return result;
119 }
120 public String listAllBooks()
121 {
122 return(numList.toString());
123 }
124 }
图形界面类的实现
1 import java.awt.*;
2 import java.awt.event.*;
3 import javax.swing.*;
4 import java.util.*;
5 public class Gui
6 {
7 static Library lib=new Library();
8 static String result="";
9 public static void main(String[] args)
10 {
11 Board mybox=new Board();
12
13 Book aBook=new Book("Java 程序设计","清华大学出版社",new MyDate(1999,2,10));
14 aBook.addAuthor("郑莉");
15 lib.addBook(aBook);
16
17 aBook=new Book("C语言程序设计", "清华大学出版社", new MyDate(2005,3,20));
18 aBook.addAuthor("谭浩强");
19 lib.addBook(aBook);
20
21 aBook=new Book("计算机原理简明教程", "北京理工大学出版社", new MyDate(2009,5,22));
22 aBook.addAuthor("王铁峰");
23 lib.addBook(aBook);
24
25 aBook=new Book("数理语言学", "商务印书馆", new MyDate(2010,5,6));
26 aBook.addAuthor("冯志伟");
27 lib.addBook(aBook);
28
29 aBook=new Book("大学英语通用翻译教程", "对外经济贸易大学出版社", new MyDate(2012,11,18));
30 aBook.addAuthor("余静娴");
31 lib.addBook(aBook);
32
33 aBook=new Book("考研词汇分频速记", "西安交通大学出版社", new MyDate(2013,6,20));
34 aBook.addAuthor("俞敏洪");
35 lib.addBook(aBook);
36
37 aBook=new Book("计算机组成原理", "高等教育出版社", new MyDate(2008,4,20));
38 aBook.addAuthor("唐朔飞");
39 lib.addBook(aBook);
40
41 aBook=new Book("马克思主义基本原理概论", "高等教育出版社", new MyDate(2013,3,24));
42 aBook.addAuthor("本书编写组");
43 lib.addBook(aBook);
44
45 aBook=new Book("数据结构", "清华大学出版社", new MyDate(2013,8,20));
46 aBook.addAuthor("邓俊辉");
47 lib.addBook(aBook);
48
49 aBook=new Book("概率论基础教程", "机械工业出版社", new MyDate(2005,12,26));
50 aBook.addAuthor("Sheldon Ross");
51 lib.addBook(aBook);
52
53
54
55
56 result= lib.toString()+"\n"+lib.listAllBooks();
57
58 mybox.addWindowListener(new WindowAdapter()
59 {
60 public void windowClosing(WindowEvent e)
61 {System.exit(0);}
62 });
63 }
64 }
65
66 class Board extends JFrame implements ActionListener//主面板
67 {
68 public static final int Width=300;
69 public static final int Height=200;
70 String proList[]={"编号","书名","作者","出版社"};
71 JTextField keywd;
72 static JTextArea state_text;
73 static JTextArea result_text;
74 static int flg=0;//类变量标记录入/修改
75 JComboBox comboBox;
76 JButton submit,record,delete,change;
77 JLabel keyword,type;
78 public Board()
79 {
80 setSize(Width,Height);
81 setTitle("图书馆");
82 Container conPane=getContentPane();
83 conPane.setLayout(new FlowLayout());
84
85 comboBox=new JComboBox(proList);
86 type=new JLabel("查询类别");
87 conPane.add(type);
88 conPane.add(comboBox);
89
90 keyword=new JLabel("检索关键字");
91 keywd=new JTextField(10);
92 conPane.add(keyword);
93 conPane.add(keywd);
94
95 submit=new JButton("检索");
96 submit.addActionListener(this);
97 conPane.add(submit);
98
99 record=new JButton("录入");
100 record.addActionListener(this);
101 conPane.add(record);
102
103 delete=new JButton("删除");
104 delete.addActionListener(this);
105 conPane.add(delete);
106
107 change=new JButton("修改");
108 change.addActionListener(this);
109 conPane.add(change);
110
111 state_text=new JTextArea(5,20);
112 state_text.setLineWrap(true);
113 conPane.add(state_text);
114
115 result_text=new JTextArea(20,40);
116 result_text.setLineWrap(true);
117 conPane.add(result_text);
118 conPane.setVisible(true);
119
120 this.setVisible(true);
121 this.pack();
122 }
123
124 public void actionPerformed(ActionEvent e)
125 {
126 if(e.getSource()==submit)
127 {
128 String state="以关键字 "+comboBox.getSelectedItem().toString()+" 查询："+"\n";
129 state += "您输入的关键字为: "+keywd.getText();
130 state_text.setText(state);
131 String search_result="";
132 search_result+="以下是您要查找的书："+"\n";
133 if(comboBox.getSelectedIndex()==0)
134 {
135 search_result+=Gui.lib.listBooksWithNum(Integer.parseInt(keywd.getText()));
136 }
137 else if(comboBox.getSelectedIndex()==1)
138 {
139 search_result+=Gui.lib.listBooksWithTitle(keywd.getText());
140 }
141 else if(comboBox.getSelectedIndex()==2)
142 {
143 search_result+=Gui.lib.listBooksWithAuthor(keywd.getText());
144 }
145 else if(comboBox.getSelectedIndex()==3)
146 {
147 search_result+=Gui.lib.listBooksWithPublisher(keywd.getText());
148 }
149 result_text.setText(search_result);
150 }
151
152 if(e.getSource()==record)
153 {
154 MyDialog recording=new MyDialog(this,"录入");
155 flg=1;
156 recording.setVisible(true);
157 }
158 else if(e.getSource()==delete)
159 {
160 DeDialog deleting=new DeDialog(this,"删除");
161 deleting.setVisible(true);
162 }
163 else if(e.getSource()==change)
164 {
165 MyDialog changing=new MyDialog(this,"修改");
166 flg=2;
167 changing.setVisible(true);
168 }
169 }
170 public static void returnName(String s)
171 {
172 state_text.setText(s);
173 result_text.setText("现在图书馆里有的书： "+"\n"+Gui.result);
174 }
175 }
176 class MyDialog extends JDialog implements ActionListener//录入、修改的对话框
177 {
178 JLabel title,author,publisher,date;
179 JTextField text_title,text_author,text_publisher,text_date_year,text_date_month,text_date_day;
180 JButton done;
181 MyDialog(JFrame F,String s)
182 {
183 super(F,s,true);
184 Container con=this.getContentPane();
185 con.setLayout(new FlowLayout());
186 setModal(false);
187 done=new JButton("确定");
188 done.addActionListener(this);
189
190 title=new JLabel("书名");
191 text_title=new JTextField(10);
192 text_title.setEditable(true);
193 con.add(title);
194 con.add(text_title);
195
196 author=new JLabel("作者");
197 text_author=new JTextField(10);
198 text_author.setEditable(true);
199 con.add(author);
200 con.add(text_author);
201
202 publisher=new JLabel("出版社");
203 text_publisher=new JTextField(10);
204 text_publisher.setEditable(true);
205 con.add(publisher);
206 con.add(text_publisher);
207
208 date=new JLabel("出版日期（年/月/日）");
209 con.add(date);
210
211 text_date_year=new JTextField(3);
212 text_date_year.setEditable(true);
213 con.add(text_date_year);
214
215 text_date_month=new JTextField(3);
216 text_date_month.setEditable(true);
217 con.add(text_date_month);
218
219 text_date_day=new JTextField(3);
220 text_date_day.setEditable(true);
221 con.add(text_date_day);
222
223 con.add(done);
224 con.setVisible(true);
225 this.pack();
226 }
227 public void actionPerformed(ActionEvent e)
228 {
229 if(Board.flg==1)//录入
230 {
231 MyDate aDate=new MyDate(Integer.parseInt(text_date_year.getText()),
232 Integer.parseInt(text_date_month.getText()),Integer.parseInt(text_date_day.getText()));
233 Book aBook=new Book(text_title.getText(),text_publisher.getText(), aDate); aBook.addAuthor(text_author.getText());
234 Gui.lib.addBook(aBook);
235 Gui.result= Gui.lib.toString()+"\n"+Gui.lib.listAllBooks();
236 Board.returnName("您已添加 "+"\n"+aBook.toString()+" 到图书馆中");
237 }
238 else if(Board.flg==2)//修改
239 {
240 MyDate aDate=new MyDate(Integer.parseInt(text_date_year.getText()),
241 Integer.parseInt(text_date_month.getText()),Integer.parseInt(text_date_day.getText()));
242 String s=Gui.lib.modifyBook(text_title.getText(),text_author.getText(),text_publisher.getText(),aDate);
243 Gui.result= Gui.lib.toString()+"\n"+Gui.lib.listAllBooks();
244 Board.returnName(s);
245 }
246 setVisible(true);
247 dispose();
248 }
249 }
250 class DeDialog extends JDialog implements ActionListener//删除的对话框
251 {
252 JLabel title;
253 static JTextField text_title;
254 JButton done;
255 DeDialog(JFrame F, String s)
256 {
257 super(F,s,true);
258 Container con=this.getContentPane();
259 con.setLayout(new FlowLayout());
260 con.setSize(300,500);
261 setModal(false);
262 done=new JButton("确定");
263 done.addActionListener(this);
264
265 title=new JLabel("书名");
266 text_title=new JTextField(10);
267 text_title.setEditable(true);
268 con.add(title);
269 con.add(text_title);
270
271 con.add(done);
272 con.setVisible(true);
273 this.pack();
274 }
275 public void actionPerformed(ActionEvent e)
276 {
277 String s=Gui.lib.removeBook(DeDialog.text_title.getText());
278 Gui.result= Gui.lib.toString()+"\n"+Gui.lib.listAllBooks();
279 Board.returnName(s);
280 setVisible(true);
281 dispose();
282
283 }
284 }
Gui.java
学习过程的参考资料：
Java语言程序设计/郑莉/清华大学出版社
微学苑Java教程 http://www.weixueyuan.net/view/6055.html
时间： 2024-10-06 01:00:43