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package nnn; public class book { private Integer id; private String name; private double price; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public double getPrice() { return price; } public void setPrice(double price) { this.price = price; } public book(Integer id, String name, double price) { super(); this.id = id; this.name = name; this.price = price; } public book() { super(); } }
package nnn; import java.util.ArrayList; import java.util.List; import java.util.Scanner; public class main { public static void main(String[] args) { List<book> list = new ArrayList<book>(); book book = new book(); book b1 = new book(1, "第一本", 5); book b2 = new book(2, "第二本", 12); book b3 = new book(3, "第三本", 13); list.add(b1); list.add(b2); list.add(b3); show(list, book); } public static void show(List<book> list, book book) { System.out.println("1.添加图书"); System.out.println("2.删除图书"); System.out.println("3.修改图书"); System.out.println("4.查询图书"); System.out.println("请选择"); select(list, book); } public static void select(List<book> list, book book) { int i = new Scanner(System.in).nextInt(); switch (i) { case 1: System.out.println("请添加图书的编号:"); book.setId(new Scanner(System.in).nextInt()); System.out.println("请添加图书的名称:"); book.setName(new Scanner(System.in).next()); System.out.println("请添加图书的价格:"); book.setPrice(new Scanner(System.in).nextDouble()); list.add(book); System.out.println("添加成功"); show(list, book); break; case 2: System.out.println("请输入要删除图书的名称:"); String name=new Scanner(System.in).next(); for (int j = 0; list != null && j < list.size(); j++) { if (list.get(j).getName().equals(name)) { list.remove(j); } } System.out.println("删除成功"); show(list, book); break; case 3: System.out.println("请输入要修改图书的编号:"); int k=new Scanner(System.in).nextInt();; for (int j = 0; list != null && j < list.size(); j++) { if (list.get(j).getId().equals(k)) { list.remove(j); System.out.println("请输入修改后图书的名称:"); String name1=new Scanner(System.in).next(); System.out.println("请输入修改后图书的价格:"); double price1=new Scanner(System.in).nextDouble(); book b=new book(k,name1,price1); list.add(b); break; } } System.out.println("修改成功"); show(list, book); break; case 4: for (int j = 0; list != null && j < list.size(); j++) { System.out.println(list.get(j).getId() + "." + list.get(j).getName() + "," + list.get(j).getPrice()); } show(list, book); break; } } }
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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@page import="nnn.book"%> <!DOCTYPE HTML > <html> <head> <title></title> </head> <body> <% List<book> list = new ArrayList<book>(); book b1 = new book(1, "第一本", 5); book b2 = new book(2, "第二本", 12); book b3 = new book(3, "第三本", 13); list.add(b1); list.add(b2); list.add(b3); for (int i = 0; list != null && i < list.size(); i++) { out.print(list.get(i).getId() + "." + list.get(i).getName() + "," + list.get(i).getPrice()+"<br>"); } %> </body> </html>