自己写的，仅供参考！
package com.xixi.book;
import java.util.InputMismatchException;
import java.util.Scanner;
import com.xixi.book.beans.Books;
import com.xixi.book.dao.BookShow;
import com.xixi.book.dao.BooksDao;
import com.xixi.book.exception.BookException;
public class Main_book {
public static void main(String[] args) {
try {
new Main_book().show();
} catch (BookException e) {
e.printStackTrace();
}
}
private static final BooksDao booksdao = new BooksDao();
public static void show() throws BookException{
try {
String name = "";
int id;
Scanner scan = new Scanner(System.in);
BookShow show = new BookShow();
System.out.println("输入命令： 1 -- 按照名称查找图书；2 -- 按照序号查找图书");
int count = scan.nextInt();
if(count == 1) {
System.out.println("输入图书名称:");
scan=new Scanner(System.in);
name = scan.nextLine();
show.getNameShow(name);
}else if(count == 2) {
System.out.println("输入图书ID：");
id = scan.nextInt();
show.getIdShow(id);
}else {
System.out.println("输入错误!");
show();
}
} catch (InputMismatchException e) {
System.out.println("命令输入错误！请根据提示输入数字命令");
show();
}catch (Exception e) {
show();
}
}
}
package com.xixi.book.beans;
public class Books {
private int id;
private String BookName;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getBookName() {
return BookName;
}
public void setBookName(String bookName) {
BookName = bookName;
}
@Override
public String toString() {
return "序号:\t" + id + ", 书籍名称：\t" + BookName + "";
}
}
package com.xixi.book.dao;
import java.util.Vector;
import com.xixi.book.beans.Books;
public class BooksDao {
public BooksDao() {
initialization();
}
public Vector<Books> getAllBook(){
return books;
}
Vector<Books> books = new Vector<>();
public void initialization() {
Books books = new Books();
books.setId(1);
books.setBookName("数据结构");
this.books.add(books);
books = new Books();
books.setId(2);
books.setBookName("高数");
this.books.add(books);
books = new Books();
books.setId(3);
books.setBookName("Java程序设计");
this.books.add(books);
books = new Books();
books.setId(4);
books.setBookName("软件工程与UML");
this.books.add(books);
books = new Books();
books.setId(5);
books.setBookName("Web前端开发");
this.books.add(books);
}
}
package com.xixi.book.dao;
import java.util.Scanner;
import java.util.Vector;
import com.xixi.book.Main_book;
import com.xixi.book.beans.Books;
import com.xixi.book.exception.BookException;
public class BookShow {
Scanner scan = new Scanner(System.in);
private static final BooksDao booksdao = new BooksDao();
public void getNameShow(String name) throws BookException {
Vector<Books> books = booksdao.getAllBook();
// for (int i = 0; i < books.size(); i++) {
// if(books.get(i).equals(name)) {
// System.out.println(books.get(i));
// return;
// }else if(i==books.size()-1)
// System.out.println("名为:"+name+"的图书不存在");
// }
boolean noHave=true;
for(Books book:books) {
if(book.getBookName().equals(name)) {
System.out.println(book);
noHave=false;
break;
}
}
if(noHave) {
System.out.println("名为:"+name+"的图书不存在");
new Main_book().show();
}
}
public void getIdShow(int id) {
Vector<Books> books = booksdao.getAllBook();
boolean noHave = true;
for(Books book : books) {
if(book.getId() == id) {
System.out.println(book);
noHave = false;
break;
}
}
if(noHave)
System.out.println("序号为："+id+"，不存在！");
}
}
package com.xixi.book.exception;
public class BookException extends Exception{
public BookException() {
}
public BookException(String name) {
super(name);
}
}
