Java第九周作业
1.
package packk;
public class Book {
int id;
String name;
double price;
public int getId() {
return id;
}
public void setId(int 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(int id, String name, double price) {
super();
this.id = id;
this.name = name;
this.price = price;
}
public Book() {
super();
// TODO Auto-generated constructor stub
}
@Override
public String toString() {
return "Book [id=" + id + ", name=" + name + ", price=" + price + "]";
}
}
package packk;
import java.util.ArrayList;
import java.util.Scanner;
public class product {
static java.util.List<Book> list =new ArrayList<Book>();
static{
Book book1 =new Book(1, "初中", 100);
Book book2 =new Book(2, "高中", 300);
Book book3 =new Book(3, "大学", 800);
list.add(book1);
list.add(book2);
list.add(book3);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
while(true){
System.out.println("1.添加");
System.out.println("2.删除");
System.out.println("3.修改");
System.out.println("4.查询");
System.out.println("0.退出程序");
System.out.println("请选择0-4");
Scanner scanner=new Scanner(System.in);
int i=scanner.nextInt();
switch (i) {
case 1:
addbook();
System.out.println("是否返回主界面Y/N?");
String s=scanner.next();
if (s.equals("Y")) {
break;
}
else {
return;
}
case 2:
delBoook();
System.out.println("是否返回主界面Y/N?");
s=scanner.next();
if (s.equals("Y")) {
break;
}
else {
return;
}
case 3:
update();
System.out.println("是否返回主界面Y/N?");
s=scanner.next();
if (s.equals("Y")) {
break;
}
else {
return;
}
case 4:
search();
System.out.println("是否返回主界面Y/N?");
s=scanner.next();
if (s.equals("Y")) {
break;
}
else {
return;
}
case 0:
System.out.println("退出成功");
return;
}
}
}
private static void search() {
// TODO Auto-generated method stub
for (Book book4 : list) {
System.out.println(book4);
}
}
private static void update() {
// TODO Auto-generated method stub
System.out.println("请输入修改的图书id");
int update=new Scanner(System.in).nextInt();
for (Book book : list) {
if (update==book.getId()) {
System.err.println("请输入名称");
String b1=new Scanner(System.in).next();
System.err.println("请输入价格");
int c1=new Scanner(System.in).nextInt();
book.setName(b1);
book.setPrice(c1);
System.out.println("修改成功");
}
}
}
private static void delBoook() {
System.out.println("请输入你要删除的图书id");
int id=new Scanner(System.in).nextInt();
try {
for (Book book : list) {
if (list.size()!=0) {
if (id==book.getId()) {
list.remove(book);
System.out.println("删除成功");
}
}
}
} catch (Exception e) {
// TODO: handle exception
}
}
private static void addbook() {
// TODO Auto-generated method stub
Scanner scanner=new Scanner(System.in);
System.err.println("请输入id");
int a=scanner.nextInt();
System.err.println("请输入名称");
String b=scanner.next();
System.err.println("请输入价格");
int c=scanner.nextInt();
Book book=new Book(a, b, c);
list.add(book);
System.out.println("添加成功");
}
}
2.
<%@page import="Book.Book"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head></head>
<body>
<%
ArrayList<Book> list=new ArrayList<Book>();
Book book1=new Book(1,"初中",100);
Book book2=new Book(2,"高中", 300);
Book book3=new Book(3,"大学", 500);
list.add(book1);
list.add(book2);
list.add(book3);
for (int i = 0; i < list.size(); i++) {
Book b=list.get(i);
int id=b.getId();
String name=b.getName();
double price=b.getPrice();
out.print("ID为"+id+"<br>"+"书名为："+name+"、价格为："+price+"<br>");
}
%>
</body>
</html>
