期末小作业-图书馆管理系统

package MangerBook; import java.util.Scanner; public class BookDaoLmpl implements BookDao { Book books[]= new Book[10]; Scanner scanner = new Scanner(System.in); @Override public void uilogin() { //工号默认2024007 //密码默认123 System.out.println("*******************"); System.out.println("图书管理系统登录"); System.out.println("*******************"); System.out.println("请输入工号："); String idlogin = scanner.next(); System.out.println("请输入密码："); String namelogin = scanner.next(); if (idlogin.equals("2024007") && namelogin.equals("123")){ System.out.println("登陆成功......"); ui(); } else { System.out.println("密码错误"); } } @Override public void ui() { while (true){ System.out.println("*******************"); System.out.println("学生信息管理系统"); System.out.println("*******************"); System.out.println("1- 添加图书信息"); System.out.println("2- 修改图书信息"); System.out.println("3- 删除图书信息"); System.out.println("4- 根据编号查询图书信息"); System.out.println("5-根据名称模糊查询图书信息"); System.out.println("6- 根据价格范围查询图书信息"); System.out.println("7- 查询所有图书信息"); System.out.println("8- 退出系统"); System.out.println("*******************"); System.out.println("请输入你的选择："); int choose = scanner.nextInt(); if (choose==1){ add(); } else if (choose==2) { update(); } else if (choose==3) { delete(); } else if (choose==4) { selectById(); } else if (choose==5) { selectByName(); } else if (choose==6) { selectByPrice(); } else if (choose==7) { selectAll(); } else if (choose==8) { System.out.println("是否退出系统？"); System.out.println("1. 退出 2.取消"); int chooseexit = scanner.nextInt(); if (chooseexit == 1) { System.out.println("正在退出......"); break; } else if (chooseexit==2){ System.out.println("取消退出！"); }else { System.out.println("非法字符，请重新输入！"); } } else { System.out.println("非法字符，请重新输入！"); } } } @Override public void add() { int id1; String name1; String author1; double price1; System.out.println("请输入你要录入图书信息的编号"); id1 = scanner.nextInt(); if (isOnly(id1)==false){ System.out.println("没有该编号的图书信息，请录入！"); System.out.println("请输入图书的名称"); name1 = scanner.next(); System.out.println("请输入图书的作者"); author1 = scanner.next(); System.out.println("请输入图书的价格"); price1 = scanner.nextInt(); for (int i = 0; i < books.length; i++) { if (books[i]==null){ books[i] = new Book(id1,name1,author1,price1); System.out.println("录入成功"); books[i].show(); break; } } } else { System.out.println("已经存在此编号的图书信息！重新核对编号"); } } @Override public void delete() { System.out.println("请输入你要删除的图书的编号！"); int id = scanner.nextInt(); if (isOnly(id)==true){ for (int i = 0; i < books.length; i++) { if (books[i]!=null){ if (books[i].getId()==id){ System.out.println("信息如下："); books[i].show(); System.out.println("是否删除此信息？"); System.out.println("1. 确认 2.取消"); int choosedelete = scanner.nextInt(); if (choosedelete==1){ System.out.println("正在删除......"); books[i] = null; System.out.println("删除成功！"); } else if (choosedelete==2) { System.out.println("已取消！"); } else { System.out.println("请输入合法数字！"); } } } } } else { System.out.println("不存在这个编号的图书信息，无法删除"); } } @Override public void update() { System.out.println("请输入你要修改的图书的编号！"); int id = scanner.nextInt(); if (isOnly(id)==true){ for (int i = 0; i < books.length; i++) { if (books[i]!=null){ if (books[i].getId()==id){ System.out.println("旧信息如下："); books[i].show(); System.out.println("是否更新此信息？"); System.out.println("1. 确认 2.取消"); int choosedelete = scanner.nextInt(); if (choosedelete==1){ System.out.println("开始更新......"); System.out.println("请输入新的书名："); String name = scanner.next(); System.out.println("请输入新的作者："); String author = scanner.next(); System.out.println("请输入新的价格："); double price = scanner.nextInt(); Book bookupdate = new Book(id,name,author,price); books[i] = bookupdate; System.out.println("更新成功！"); } else if (choosedelete==2) { System.out.println("已取消！"); } else { System.out.println("请输入合法数字！"); } } } } } else { System.out.println("不存在这个编号的图书信息，无法修改"); System.out.println("如需要添加此信息字段，请在主界面选择添加学生信息！"); } } @Override public void selectByName() { int countIndex = -1; boolean isSelect = false; System.out.println("书名模糊查询，请输入书名："); String input = scanner.next(); for (int i = 0; i < books.length; i++) { if (books[i] != null) { if (books[i].getName().