Java学习12.04

图书管理系统——service层

service.java

 1 import java.util.ArrayList;
 2 import java.util.List;
 3 
 4 import bean.dao;
 5 import bean.Book;
 6 
 7 public class Service {
 8     static dao dao=new dao();
 9     public static Boolean add(Book activity) {
10         if(dao.findNameBook(activity.getNameBook())==true) {
11             System.out.print("已存在");
12             return false;
13         }
14         else{
15             dao.add(activity);
16             return true;
17         }
18     }
19     
20     public static  Boolean jieyue(Book activity) {
21         if(dao.findNameBook(activity.getNameBook())==true) {
22             System.out.print("已存在");
23             Book book=new Book();
24             book.setNumber(activity.getNumber());
25             return false;
26         }
27         else{
28             dao.add(activity);
29             return true;
30         }
31     }
32 
33     public static ArrayList<Book> search(Book activity) {
34         if(dao.findNameBook(activity.getNameBook())==true) {
35             ArrayList<Book> activity1=dao.select(activity.getNameBook());
36             //System.out.print(course1.getClassroom()+"  "+course1.getName()+"  "+course1.getTeacher());
37             return activity1;
38         }
39         else {
40             System.out.print("未找到");
41             return null;
42         }
43             
44     }
45     public static List<Book> list() {    
46         return dao.getAllinformation();
47     }
48 }

serviceindex.java

 1 import java.util.ArrayList;
 2 import java.util.List;
 3 
 4 import bean.dao;
 5 import bean.Book;
 6 
 7 public class Service {
 8     static dao dao=new dao();
 9     public static Boolean add(Book activity) {
10         if(dao.findNameBook(activity.getNameBook())==true) {
11             System.out.print("已存在");
12             return false;
13         }
14         else{
15             dao.add(activity);
16             return true;
17         }
18     }
19     
20     public static  Boolean jieyue(Book activity) {
21         if(dao.findNameBook(activity.getNameBook())==true) {
22             System.out.print("已存在");
23             Book book=new Book();
24             book.setNumber(activity.getNumber());
25             return false;
26         }
27         else{
28             dao.add(activity);
29             return true;
30         }
31     }
32 
33     public static ArrayList<Book> search(Book activity) {
34         if(dao.findNameBook(activity.getNameBook())==true) {
35             ArrayList<Book> activity1=dao.select(activity.getNameBook());
36             //System.out.print(course1.getClassroom()+"  "+course1.getName()+"  "+course1.getTeacher());
37             return activity1;
38         }
39         else {
40             System.out.print("未找到");
41             return null;
42         }
43             
44     }
45     public static List<Book> list() {    
46         return dao.getAllinformation();
47     }
48 }

servicepeople.java

 1 import java.util.ArrayList;
 2 import java.util.List;
 3 
 4 import bean.daopeople;
 5 import bean.studentInfo;
 6 
 7 public class Servicepeople {
 8     static daopeople daopeople=new daopeople();
 9     public static Boolean add(studentInfo activity) {
10         if(daopeople.findNamepeople(activity.getName())==true) {
11             System.out.print("已存在");
12             return false;
13         }
14         else{
15             daopeople.add(activity);
16             return true;
17         }
18     }
19 
20     public static ArrayList<studentInfo> search(studentInfo activity) {
21         if(daopeople.findNamepeople(activity.getName())==true) {
22             ArrayList<studentInfo> activity1=daopeople.select(activity.getName());
23             //System.out.print(course1.getClassroom()+"  "+course1.getName()+"  "+course1.getTeacher());
24             return activity1;
25         }
26         else {
27             System.out.print("未找到");
28             return null;
29         }
30             
31     }
32     public static List<studentInfo> list() {    
33         return daopeople.getAllinformation();
34     }
35 }

明天计划

明天练习servlet层