Java学习12.04

图书管理系统——service层

service.java

import java.util.ArrayList;
import java.util.List;

import bean.dao;
import bean.Book;

public class Service {
    static dao dao=new dao();
    public static Boolean add(Book activity) {
        if(dao.findNameBook(activity.getNameBook())==true) {
            System.out.print("已存在");
            return false;
        }
        else{
            dao.add(activity);
            return true;
        }
    }
    
    public static  Boolean jieyue(Book activity) {
        if(dao.findNameBook(activity.getNameBook())==true) {
            System.out.print("已存在");
            Book book=new Book();
            book.setNumber(activity.getNumber());
            return false;
        }
        else{
            dao.add(activity);
            return true;
        }
    }

    public static ArrayList<Book> search(Book activity) {
        if(dao.findNameBook(activity.getNameBook())==true) {
            ArrayList<Book> activity1=dao.select(activity.getNameBook());
            //System.out.print(course1.getClassroom()+"  "+course1.getName()+"  "+course1.getTeacher());
            return activity1;
        }
        else {
            System.out.print("未找到");
            return null;
        }
            
    }
    public static List<Book> list() {    
        return dao.getAllinformation();
    }
}

serviceindex.java

import java.util.ArrayList;
import java.util.List;

import bean.dao;
import bean.Book;

public class Service {
    static dao dao=new dao();
    public static Boolean add(Book activity) {
        if(dao.findNameBook(activity.getNameBook())==true) {
            System.out.print("已存在");
            return false;
        }
        else{
            dao.add(activity);
            return true;
        }
    }
    
    public static  Boolean jieyue(Book activity) {
        if(dao.findNameBook(activity.getNameBook())==true) {
            System.out.print("已存在");
            Book book=new Book();
            book.setNumber(activity.getNumber());
            return false;
        }
        else{
            dao.add(activity);
            return true;
        }
    }

    public static ArrayList<Book> search(Book activity) {
        if(dao.findNameBook(activity.getNameBook())==true) {
            ArrayList<Book> activity1=dao.select(activity.getNameBook());
            //System.out.print(course1.getClassroom()+"  "+course1.getName()+"  "+course1.getTeacher());
            return activity1;
        }
        else {
            System.out.print("未找到");
            return null;
        }
            
    }
    public static List<Book> list() {    
        return dao.getAllinformation();
    }
}

servicepeople.java

import java.util.ArrayList;
import java.util.List;

import bean.daopeople;
import bean.studentInfo;

public class Servicepeople {
    static daopeople daopeople=new daopeople();
    public static Boolean add(studentInfo activity) {
        if(daopeople.findNamepeople(activity.getName())==true) {
            System.out.print("已存在");
            return false;
        }
        else{
            daopeople.add(activity);
            return true;
        }
    }

    public static ArrayList<studentInfo> search(studentInfo activity) {
        if(daopeople.findNamepeople(activity.getName())==true) {
            ArrayList<studentInfo> activity1=daopeople.select(activity.getName());
            //System.out.print(course1.getClassroom()+"  "+course1.getName()+"  "+course1.getTeacher());
            return activity1;
        }
        else {
            System.out.print("未找到");
            return null;
        }
            
    }
    public static List<studentInfo> list() {    
        return daopeople.getAllinformation();
    }
}

明天计划

明天练习servlet层