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面向对象基础项目----图书管理系统（数组）

登录： 判断用户输入的帐号密码是否正确。

1 用户平台：1.1图书信息查询；1.2图书购买；1.3退出

2 管理平台：2.1图书入库；2.2图书出库；2.3增加图书

3 管理员：3.1会员信息查询；3.2会员信息增加；3.3会员信息修改；3.4会员信息删除；3.5退出

User.class

 1 package com.jianglai.books;
 2 
 3 /**
 4  * 用户类
 5  * @author jl
 6  *
 7  */
 8 public class User {
 9 
10     private String username;
11     private String pwd;
12     private int type;//1代表用户，2代表管理员
13 
14     public User() {
15         super();
16         // TODO Auto-generated constructor stub
17     }
18 
19     
20     
21     public User(String username, String pwd, int type) {
22         super();
23         this.username = username;
24         this.pwd = pwd;
25         this.type = type;
26     }
27 
28 
29 
30     @Override
31     public String toString() {
32         return "User [username=" + username + ", pwd=" + pwd + ", type=" + type + "]";
33     }
34 
35     public int getType() {
36         return type;
37     }
38 
39     public void setType(int type) {
40         this.type = type;
41     }
42 
43     public String getUsername() {
44         return username;
45     }
46 
47     public void setUsername(String username) {
48         this.username = username;
49     }
50 
51     public String getPwd() {
52         return pwd;
53     }
54 
55     public void setPwd(String pwd) {
56         this.pwd = pwd;
57     }
58 
59 }

Book.class

  1 package com.jianglai.books;
  2 
  3 /**
  4  * 书类
  5  * @author jl
  6  *
  7  */
  8 public class Book {
  9 
 10     private int book_Id;
 11     private String book_name;
 12     private String book_author;
 13     private String book_date;
 14     private double book_price;
 15     private int book_count;
 16     
 17     
 18     
 19     public Book() {
 20         super();
 21         // TODO Auto-generated constructor stub
 22     }
 23 
 24 
 25 
 26     public Book(int book_Id, String book_name, String book_author, String book_date, double book_price,
 27             int book_count) {
 28         super();
 29         this.book_Id = book_Id;
 30         this.book_name = book_name;
 31         this.book_author = book_author;
 32         this.book_date = book_date;
 33         this.book_price = book_price;
 34         this.book_count = book_count;
 35     }
 36 
 37 
 38     
 39 
 40     public int getBook_Id() {
 41         return book_Id;
 42     }
 43 
 44 
 45 
 46     public void setBook_Id(int book_Id) {
 47         this.book_Id = book_Id;
 48     }
 49 
 50 
 51 
 52     public String getBook_name() {
 53         return book_name;
 54     }
 55 
 56 
 57 
 58     public void setBook_name(String book_name) {
 59         this.book_name = book_name;
 60     }
 61 
 62 
 63 
 64     public String getBook_author() {
 65         return book_author;
 66     }
 67 
 68 
 69 
 70     public void setBook_author(String book_author) {
 71         this.book_author = book_author;
 72     }
 73 
 74 
 75 
 76     public String getBook_date() {
 77         return book_date;
 78     }
 79 
 80 
 81 
 82     public void setBook_date(String book_date) {
 83         this.book_date = book_date;
 84     }
 85 
 86 
 87 
 88     public double getBook_price() {
 89         return book_price;
 90     }
 91 
 92 
 93 
 94     public void setBook_price(double book_price) {
 95         this.book_price = book_price;
 96     }
 97 
 98 
 99 
100     public int getBook_count() {
101         return book_count;
102     }
103 
104 
105 
106     public void setBook_count(int book_count) {
107         this.book_count = book_count;
108     }
109 
110 
111 
112     @Override
113     public String toString() {
114         return "Book [book_Id=" + book_Id + ", book_name=" + book_name + ", book_author=" + book_author + ", book_date="
115                 + book_date + ", book_price=" + book_price + ", book_count=" + book_count + "]";
116     }
117     
118     
119 }

DataList.class

 1 package com.jianglai.books;
 2 
 3 import java.util.Arrays;
 4 
 5 /**
 6  * 数据管理类
 7  * @author jl
 8  *
 9  */
10 public class DataList {
11 
12 
13     
14     private User[] userList;
15     private Book[] bookList;
16 
17     public DataList() {
18         //初始化一个用户数组，并赋值
19         this.userList = new User[]{
20                 new User("user","user",1),
21                 new User("jl", "000000", 2),
22                 new User("admin", "admin", 0),
23                 new User("root", "root", 0)};
24         
25         //初始化一个书的数组，并赋值
26         this.bookList = new Book[]{
27                 new Book(10001, "鬼吹灯", "天下霸唱", "2008-7-1", 27.8, 87),
28                 new Book(10002, "魔戒1", "莫尔斯","2005-3-14", 54, 13),
29                 new Book(10003, "华丽波特1", "罗琳","2003-2-14", 43.5, 99),
30                 new Book(10004, "时间机器", "威尔","1965-3-3", 21.3, 75),
31                 new Book(10005, "宇宙奥秘", "霍金","2003-12-23", 87.3, 14),};
32     }
33     
34     public DataList(User[] userList, Book[] bookList) {
35         super();
36         this.userList = userList;
37         this.bookList = bookList;
38         
39     }
40     public User[] getUserList() {
41         return userList;
42     }
43     public void setUserList(User[] userList) {
44         this.userList = userList;
45     }
46     public Book[] getBookList() {
47         return bookList;
48     }
49     public void setBookList(Book[] bookList) {
50         this.bookList = bookList;
51     }
52     
53     
54     @Override
55     public String toString() {
56         return "DataList [userList=" + Arrays.toString(userList) + ", bookList=" + Arrays.toString(bookList) + "]";
57     }
58     
59     
60     
61     
62 
63 }

userManager.class

  1 package com.jianglai.books;
  2 
  3 import java.util.Arrays;
  4 
  5 /**
  6  * 用户管理类   ---   实现各种方法。
  7  * @author jl
  8  *
  9  */
 10 public class UserManager {
 11     
 12     
 13     DataList dl = new DataList();
 14     
 15     
 16     /**
 17      * 登录方法--  查询数据，返回查到的用户信息。
 18      * @param username   用户名
 19      * @param pwd           密码
 20      * @return            返回一个用户类，好用来判断登录角色
 21      */
 22     public User login(String username,String pwd) {
 23         User user = new User();
 24         for (int i = 0; i < dl.getUserList().length; i++) {
 25             if(username.equals(dl.getUserList()[i].getUsername())&&pwd.equals(dl.getUserList()[i].getPwd())){
 26                 return dl.getUserList()[i];
 27             }
 28         }
 29         
 30         return user;
 31     }
 32     
 33 
 34     /**
 35      *     用户类中查找整个书单列表
 36      */
 37     public void findBookList() {
 38         System.out.println("书号		书名		作者		发布日期			价格		库存");
 39         for (int i = 0; i < dl.getBookList().length; i++) {
 40             System.out.println(dl.getBookList()[i].getBook_Id()+"		"+dl.getBookList()[i].getBook_name()+"		"+dl.getBookList()[i].getBook_author()
 41                     +"		"+dl.getBookList()[i].getBook_date()+"		"+dl.getBookList()[i].getBook_price()+"		"+dl.getBookList()[i].getBook_count());
 42         }
 43     }
 44 
 45 
 46     /**
 47      *   购买图书
 48      * @param book_Id            购买图书的id
 49      * @param book_Count        购买图书的数量
 50      */
 51     public void moneyCount(int book_Id, int book_Count) {
 52         
 53         for (int i = 0; i < dl.getBookList().length; i++) {
 54             if(book_Id == dl.getBookList()[i].getBook_Id()){
 55                 dl.getBookList()[i].setBook_count(dl.getBookList()[i].getBook_count()-book_Count);
 56                 System.out.println(dl.getBookList()[i].getBook_name()+":"+
 57                 dl.getBookList()[i].getBook_price()+"
数量："+book_Count+"
总计："+(book_Count*dl.getBookList()[i].getBook_price()));
 58             }
 59         }
 60         
 61     }
 62 
 63 
 64     /**
 65      *    管理员查询用户全部信息的界面。
 66      */
 67     public void findUserList() {
 68         
 69         System.out.println("会员帐号			会员密码			会员角色");
 70         for (int i = 0; i < dl.getUserList().length; i++) {
 71             System.out.println(dl.getUserList()[i].getUsername()+"			"+dl.getUserList()[i].getPwd()+"			"
 72                             +dl.getUserList()[i].getType());
 73         }
 74         
 75     }
 76     
 77     /**
 78      *    注册会员功能
 79      * @param newUserName    新会员用户名
 80      * @param newPwd        新会员密码
 81      * @param newType        新会员类型（1-用户、2-管理员）
 82      */
 83 
 84 
 85     public void addUser(String newUserName, String newPwd, int newType) {
 86         
 87         User newUser = new User(newUserName, newPwd, newType);
 88         
 89         User[] userList = new User[dl.getUserList().length+1];
 90 
 91         int index = 0 ;
 92         
 93         for (int i = 0; i < userList.length-1; i++) {
 94             userList[index] = dl.getUserList()[i];
 95             index++;
 96         }
 97         
 98         userList[userList.length-1] = newUser;
 99         
100         dl.setUserList(userList);
101         
102         for (int i = 0; i < userList.length; i++) {
103             System.out.println(userList[i].getUsername()+"			"+userList[i].getPwd()+"			"+userList[i].getType());
104         }
105         
106     }
107 
108 
109     /**
110      *     修改会员功能
111      * @param uName
112      * @param uType
113      */
114     public void updateUser(String uName, int uType) {
115         for (int i = 0; i < dl.getUserList().length; i++) {
116             if(uName.equals(dl.getUserList()[i].getUsername())){
117                 System.out.println(dl.getUserList()[i]);
118                 dl.getUserList()[i].setType(uType);
119             }
120         }
121         
122     }
123 
124 
125     /**
126      *         删除用户信息
127      * @param uName        需要删除的用户信息的用户名
128      */
129     public void delUser(String uName) {
130         // TODO Auto-generated method stub
131         
132         int index = dl.getUserList().length-1;
133         User[] userList = new User[dl.getUserList().length-1];
134         
135         for (int i = 0; i < dl.getUserList().length; i++) {
136             if(uName.equals(dl.getUserList()[i].getUsername())){
137                 if(dl.getUserList()[i].getType()!=0){
138                     index = i;
139                     break;
140                 }else {
141                     System.out.println("您不能删除超级管理员用户！");
142                     return;
143                 }
144 //                index = i;
145             }
146         }
147         
148         User[] uArr1 = Arrays.copyOf(dl.getUserList(), index);
149         User[] uArr2 = Arrays.copyOfRange(dl.getUserList(), index+1, dl.getUserList().length);
150         
151         int count = 0;
152         
153         for (int i = 0; i < uArr1.length; i++) {
154             userList[i] = uArr1[i];
155             count++;
156         }
157 //        System.out.println(count);
158         for (int i = 0; i < userList.length-uArr1.length; i++) {
159             userList[count] = uArr2[i];
160             count++;
161         }
162         
163         dl.setUserList(userList);
164         findUserList();
165         
166     }
167     
168     
169     
170     
171 }

bookManager.class

 1 package com.jianglai.books;
 2 
 3 import java.util.Arrays;
 4 
 5 /**
 6  *    图书管理类
 7  * 
 8  * @author jl
 9  *
10  */
11 public class BookManager {
12 
13     DataList dl = new DataList();
14     /**
15      *         管理员类中查找所有图书信息的方法
16      */
17     public void findBookList() {
18         System.out.println("书号		书名		作者		发布日期			价格		库存");
19         for (int i = 0; i < dl.getBookList().length; i++) {
20             System.out.println(dl.getBookList()[i].getBook_Id()+"		"+dl.getBookList()[i].getBook_name()+"		"+dl.getBookList()[i].getBook_author()
21                     +"		"+dl.getBookList()[i].getBook_date()+"		"+dl.getBookList()[i].getBook_price()+"		"+dl.getBookList()[i].getBook_count());
22         }
23     }
24     
25     /**
26      *  图书入库的方法
27      * @param book_Id    需要增加数量的图书的id
28      * @param book_Count 增加图书的数量
29      */
30     public void addBookCount(int book_Id,int book_Count) {
31         
32         Book[] bookList = dl.getBookList();
33         
34         for (int i = 0; i < dl.getBookList().length; i++) {
35             if(book_Id == dl.getBookList()[i].getBook_Id()){
36                 bookList[i].setBook_count(bookList[i].getBook_count()+book_Count);
37             }
38         }
39         
40     }
41 
42     /**
43      *  图书出库的方法
44      * @param book_Id     需要删除数量的图书的id
45      * @param book_Count  删除图书的数量
46      */
47     public void delBookCount(int book_Id,int book_Count) {
48 
49         Book[] bookList = dl.getBookList();
50 
51         for (int i = 0; i < dl.getBookList().length; i++) {
52             if (book_Id == dl.getBookList()[i].getBook_Id()) {
53                 bookList[i].setBook_count(bookList[i].getBook_count() - book_Count);
54             }
55         }
56     }
57     
58 
59     /**
60      *     新增图书
61      * @param book_name            增加图书的图书名
62      * @param book_author        增加图书的作者
63      * @param book_date            增加图书的出版日期
64      * @param book_price        增加图书的价格
65      * @param book_count        增加图书的数量
66      */
67     public void addBookList(String book_name, String book_author, String book_date, double book_price, int book_count) {
68         
69         int book_Id = 10000+(dl.getBookList().length+1);
70         
71         int index = 0;
72         Book newBook = new Book(book_Id, book_name, book_author, book_date, book_price, book_count);
73         
74         Book[] bookList = new Book[dl.getBookList().length+1];
75         
76         for (int i = 0; i < dl.getBookList().length; i++) {
77             bookList[index] = dl.getBookList()[index];
78             index ++;
79         }
80         
81         bookList[dl.getBookList().length] = newBook;
82         
83         
84         dl.setBookList(bookList); 
85         
86         System.out.println("书号		书名		作者		发布日期			价格		库存");
87         for (int i = 0; i < bookList.length; i++) {
88             System.out.println(bookList[i].getBook_Id()+"		"+bookList[i].getBook_name()+"		"+bookList[i].getBook_author()
89                     +"		"+bookList[i].getBook_date()+"		"+bookList[i].getBook_price()+"		"+bookList[i].getBook_count());
90         }
91 
92     }
93 }

Test.class

  1 package com.jianglai.books;
  2 
  3 import java.util.Scanner;
  4 
  5 public class Test {
  6     
  7     public static void main(String[] args) {
  8         
  9         UserManager um = new UserManager();
 10         BookManager bm = new BookManager();
 11         
 12         Scanner in = new Scanner(System.in);
 13         
 14         DataList dl = new DataList();
 15         
 16         int num =0;//操作选择计数器
 17         
 18         
 19         while (true) {
 20             
 21             System.out.println("************欢迎使用图书书店************");
 22             //1.输入用户名和密码进行判断登录
 23             System.out.print("请输入用户名：");
 24             String username = in.next();
 25             System.out.print("请输入密码：");
 26             String pwd = in.next();
 27             
 28             //2.用户登录
 29             User u = um.login(username, pwd);
 30             
 31             //判断用户的属性
 32             if(u.getType() == 1){//用户操作界面
 33                 
 34                 System.out.println("************欢迎光临图书系统************");
 35                 
 36                 //2-1-1.用户显示书目列表
 37                 um.findBookList();
 38                 System.out.println();
 39                 
 40                 
 41                 int book_Id;// 书的ID
 42                 int book_Count;// 数的数量
 43                 
 44                 
 45                 boolean flage = true;
 46                 
 47                 while (flage) {
 48                     System.out.println("请选择进行的操作：1.查看图书	2.结账	3.退出");
 49                     num = in.nextInt();
 50                     
 51                     switch (num) {
 52                     case 1:
 53                         um.findBookList();
 54                         break;
 55                     case 2:
 56                         System.out.println("请输入想要购买的图书信息-->");
 57                         System.out.print("请输入图书ID：");
 58                         book_Id = in.nextInt();
 59                         System.out.print("请输入出库的数量：");
 60                         book_Count = in.nextInt();
 61                         
 62                         //购买图书，并且计算图书价格再显示
 63                         um.moneyCount(book_Id,book_Count);
 64                         
 65                         break;
 66                     case 3:
 67                         System.out.println("感谢使用，退出系统。");
 68                         flage = false;
 69                         break;
 70                     default:
 71                         System.out.println("您的输入有误！");
 72                         break;
 73                     }
 74                     
 75                 }
 76                 
 77                 
 78             }else if(u.getType()==2){//管理员操作界面
 79                 
 80                 System.out.println("************欢迎登录库存管理系统************");
 81 
 82                 // 2-2-1.管理员显示书目列表
 83                 bm.findBookList();
 84                 System.out.println();
 85 
 86                 boolean flag = true;
 87                 
 88                 while (flag) {
 89 
 90                     // 2-2-2.管理员操作
 91                     System.out.println("请选择进行的操作：1.图书入库	2.图书出库	3.查询全部图书	4.新增图书	5.退出");
 92                     num = in.nextInt();
 93 
 94                     int book_Id;// 书的ID
 95                     int book_Count;// 数的数量
 96 
 97                     String book_name;
 98                     String book_author;
 99                     String book_date;
100                     double book_price;
101                     int book_count;
102 
103                     switch (num) {
104                     case 1:
105                         System.out.println("请输入图书信息-->");
106                         System.out.print("请输入图书ID：");
107                         book_Id = in.nextInt();
108                         System.out.print("请输入入库的数量：");
109                         book_Count = in.nextInt();
110                         // 增加图书数量
111                         bm.addBookCount(book_Id, book_Count);
112 
113                         bm.findBookList();
114 
115                         break;
116                     case 2:
117 
118                         System.out.println("请输入图书信息-->");
119                         System.out.print("请输入图书ID：");
120                         book_Id = in.nextInt();
121                         System.out.print("请输入出库的数量：");
122                         book_Count = in.nextInt();
123                         // 删除图书数量
124                         bm.delBookCount(book_Id, book_Count);
125 
126                         bm.findBookList();
127                         break;
128                     case 3:
129                         bm.findBookList();
130                         break;
131                     case 4:
132                         System.out.println("请输入图书信息-->");
133                         System.out.print("请输入书名：");
134                         book_name = in.next();
135                         System.out.print("请输入作者：");
136                         book_author = in.next();
137                         System.out.print("请输入出版时间：");
138                         book_date = in.next();
139                         System.out.print("请输入价格：");
140                         book_price = in.nextDouble();
141                         System.out.print("请输入库存：");
142                         book_count = in.nextInt();
143                         
144                         //新增图书
145                         bm.addBookList(book_name, book_author, book_date, book_price, book_count);
146 
147                         break;
148                     case 5:
149                         System.out.println("感谢使用，退出系统。");
150                         flag = false;
151                         break;
152 
153                     default:
154                         System.out.println("您的输入有误！");
155                         break;
156                     }
157 
158                 }
159                 
160             }else if (u.getType()==0 && u.getUsername()!=null) {//超级管理员界面
161                 System.out.println("************欢迎使用管理员系统************");
162                 
163                 //查询所有用户
164                 um.findUserList();
165                 System.out.println();
166                 
167                 //新增用户的信息
168                 String newUserName;
169                 String newPwd;
170                 int newType;
171                 
172                 //修改用户
173                 String uName = null;
174                 int uType = 0;
175                 
176                 
177                 boolean flag = true;
178                 
179                 //2-0超级管理员的操作
180                 while (flag) {
181                     System.out.println("请选择进行的操作：1.查看用户列表	2.注册新用户	3.修改用户	4.删除用户	5.退出");
182                     num = in.nextInt();
183                     
184                     switch (num) {
185                     case 1:
186                         um.findUserList();
187                         break;
188                     case 2:
189                         System.out.println("请输入注册用户信息-->");
190                         System.out.print("请输出用户名：");
191                         newUserName = in.next();
192                         System.out.print("请输入密码：");
193                         newPwd = in.next();
194                         System.out.print("请输入会员角色类型（1-用户、2-管理员）：");
195                         newType = in.nextInt();
196                         
197                         um.addUser(newUserName,newPwd,newType);
198                         
199                         break;
200                     case 3:
201                         System.out.println("请输入选择用户信息-->");
202                         System.out.print("请选择用户名：");
203                         uName = in.next();
204                         System.out.print("请修改会员角色类型（1-用户、2-管理员）：");
205                         uType = in.nextInt();
206                         
207                         //修改用户的角色
208                         um.updateUser(uName,uType);
209                         um.findUserList();
210                         break;
211                     case 4:
212                         
213                         System.out.println("请输入要删除的用户信息-->");
214                         System.out.println("请输入要删除的用户的用户名：");
215                         
216                         uName = in.next();
217                         
218                         um.delUser(uName);
219                         break;
220                     case 5:
221                         System.out.println("感谢使用，退出系统。");
222                         flag = false;
223                         break;
224                     default:
225                         System.out.println("您的输入有误！");
226                         break;
227                     }
228                     
229                 }
230                 
231                 
232             }else if (u.getUsername()== null) {//用户名或者密码输入错误的情况
233                 System.err.println("用户名或密码错误，请核对后重新启动系统进行登录！");
234             }
235         }
236         
237     }
238 
239 }

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原文地址：https://www.cnblogs.com/JiangLai/p/8675136.html