librarymanager.java

运用java编写图书馆管理系统

import java.util.*;
import java.io.*;
import java.text.*;
import java.math.*;

public class LibraryManager{
	Book tempBook = new Book();
	
	//查找书
	public Book searchByNO(int num){
		Boolean flagFind = false;
		String r,temp1,temp2,temp3,temp4,temp5,temp6,temp7,temp8,temp9,temp0;
		Book tempBook = new Book();
		try{
			FileReader fileReader = new FileReader("Library.txt");
			BufferedReader bufferReader = new BufferedReader(fileReader);
			while ((r = bufferReader.readLine()) != null) {
				StringTokenizer toKen_Student = new StringTokenizer(r);
				temp0=toKen_Student.nextToken();
				temp1=toKen_Student.nextToken();
				temp2=toKen_Student.nextToken();
				temp3=toKen_Student.nextToken();
				temp4=toKen_Student.nextToken();
				temp5=toKen_Student.nextToken();
				temp6=toKen_Student.nextToken();
				temp7=toKen_Student.nextToken();
				temp8=toKen_Student.nextToken();
				temp9=toKen_Student.nextToken();
				tempBook.setNO(Integer.parseInt(temp0));
				tempBook.setName(temp1);
				tempBook.setSort(temp2);
				tempBook.setHolder(temp3);
				tempBook.setDeadline(temp4);
				tempBook.setISBN(temp5);
				tempBook.setAuthor(temp6);
				tempBook.setPublisher(temp7);
				tempBook.setPrice(Double.parseDouble(temp8));
				tempBook.setPublicTime(temp9);
				if(tempBook.getNO() == num){
					flagFind = true;
					break;
					}
				}
			}catch(Exception e){
				flagFind = false;
			}
			if(flagFind == false){
				tempBook = null;
			}
		return tempBook;
	}
	public Book searchByName(String name){
		Boolean flagFind = false;
		String r,temp1,temp2,temp3,temp4,temp5,temp6,temp7,temp8,temp9,temp0;
		try{
			FileReader fileReader = new FileReader("Library.txt");
			BufferedReader bufferReader = new BufferedReader(fileReader);
			while ((r = bufferReader.readLine()) != null) {
				StringTokenizer toKen_Student = new StringTokenizer(r);
				temp0=toKen_Student.nextToken();
				temp1=toKen_Student.nextToken();
				temp2=toKen_Student.nextToken();
				temp3=toKen_Student.nextToken();
				temp4=toKen_Student.nextToken();
				temp5=toKen_Student.nextToken();
				temp6=toKen_Student.nextToken();
				temp7=toKen_Student.nextToken();
				temp8=toKen_Student.nextToken();
				temp9=toKen_Student.nextToken();
				tempBook.setNO(Integer.parseInt(temp0));
				tempBook.setName(temp1);
				tempBook.setSort(temp2);
				tempBook.setHolder(temp3);
				tempBook.setDeadline(temp4);
				tempBook.setISBN(temp5);
				tempBook.setAuthor(temp6);
				tempBook.setPublisher(temp7);
				tempBook.setPrice(Double.parseDouble(temp8));
				tempBook.setPublicTime(temp9);
					
				if(tempBook.getName().equals(name)){
					flagFind = true;
					break;
					}
				}
			}catch (IOException ie) {
				System.err.println("error:" + ie.getMessage());
				flagFind = false;
			}
			if(flagFind == false){
				tempBook = null;
			}
		return tempBook;
	}
	public Book[] searchBySort(String sort){
		Book[] books = new Book[10];
		for (int i = 0;i<10;i++)
		{
			books[i] = new Book();
		}
		int count = 0;
		Boolean flagFind = false;
		String r,temp1,temp2,temp3,temp4,temp5,temp6,temp7,temp8,temp9,temp0;
		try{
			FileReader fileReader = new FileReader("Library.txt");
			BufferedReader bufferReader = new BufferedReader(fileReader);
			while ((r = bufferReader.readLine()) != null) {
				StringTokenizer toKen_Student = new StringTokenizer(r);
				temp0=toKen_Student.nextToken();
				temp1=toKen_Student.nextToken();
				temp2=toKen_Student.nextToken();
				temp3=toKen_Student.nextToken();
				temp4=toKen_Student.nextToken();
				temp5=toKen_Student.nextToken();
				temp6=toKen_Student.nextToken();
				temp7=toKen_Student.nextToken();
				temp8=toKen_Student.nextToken();
				temp9=toKen_Student.nextToken();
				books[count].setNO(Integer.parseInt(temp0));
				books[count].setName(temp1);
				books[count].setSort(temp2);
				books[count].setHolder(temp3);
				books[count].setDeadline(temp4);
				books[count].setISBN(temp5);
				books[count].setAuthor(temp6);
				books[count].setPublisher(temp7);
				books[count].setPrice(Double.parseDouble(temp8));
				books[count].setPublicTime(temp9);
				
				if(books[count].getSort().equals(sort)){
					flagFind = true;
					count++;
					}
				}
			}catch (IOException ie) {
				System.err.println("error:" + ie.getMessage());
				flagFind = false;
			}
			if(flagFind == false){
				books = null;
			}
		return books;
	}
	
	public Boolean bookDel(int num){     //删除书
		Boolean flagFind = false;
		String r,temp1,temp2,temp3,temp4,temp5,temp6,temp7,temp8,temp9,temp0;
		try{
			FileReader fileReader = new FileReader("Library.txt");
			Writer fileWriter = new FileWriter("temp.txt", false);
			BufferedReader bufferReader = new BufferedReader(fileReader);
			while ((r = bufferReader.readLine()) != null) {
				StringTokenizer toKen_Student = new StringTokenizer(r);
				temp0=toKen_Student.nextToken();
				temp1=toKen_Student.nextToken();
				temp2=toKen_Student.nextToken();
				temp3=toKen_Student.nextToken();
				temp4=toKen_Student.nextToken();
				temp5=toKen_Student.nextToken();
				temp6=toKen_Student.nextToken();
				temp7=toKen_Student.nextToken();
				temp8=toKen_Student.nextToken();
				temp9=toKen_Student.nextToken();
				tempBook.setNO(Integer.parseInt(temp0));
				tempBook.setName(temp1);
				tempBook.setSort(temp2);
				tempBook.setHolder(temp3);
				tempBook.setDeadline(temp4);
				tempBook.setISBN(temp5);
				tempBook.setAuthor(temp6);
				tempBook.setPublisher(temp7);
				tempBook.setPrice(Double.parseDouble(temp8));
				tempBook.setPublicTime(temp9);
					
				if(tempBook.getNO() == num ){
					flagFind = true;
					}
					else{	
						fileWriter.write(String.valueOf(tempBook.getNO())+" "+tempBook.getName()+" "+tempBook.getSort()+" "+
						tempBook.getHolder()+" "+tempBook.getDeadline()+" "+tempBook.getISBN()+" "+tempBook.getAuthor()+" "+
						tempBook.getPublisher()+" "+String.valueOf(tempBook.getPrice())+" "+tempBook.getPublicTime()+" "+
						"\r\n");
						fileWriter.flush();
						}
				}
			
			fileWriter.close();
			if(flagFind){
			fileReader = new FileReader("temp.txt");
			bufferReader = new BufferedReader(fileReader);
			fileWriter = new FileWriter("Library.txt", false);
			while ((r = bufferReader.readLine()) != null) {
				StringTokenizer toKen_Student = new StringTokenizer(r);
				temp0=toKen_Student.nextToken();
				temp1=toKen_Student.nextToken();
				temp2=toKen_Student.nextToken();
				temp3=toKen_Student.nextToken();
				temp4=toKen_Student.nextToken();
				temp5=toKen_Student.nextToken();
				temp6=toKen_Student.nextToken();
				temp7=toKen_Student.nextToken();
				temp8=toKen_Student.nextToken();
				temp9=toKen_Student.nextToken();
				tempBook.setNO(Integer.parseInt(temp0));
				tempBook.setName(temp1);
				tempBook.setSort(temp2);
				tempBook.setHolder(temp3);
				tempBook.setDeadline(temp4);
				tempBook.setISBN(temp5);
				tempBook.setAuthor(temp6);
				tempBook.setPublisher(temp7);
				tempBook.setPrice(Double.parseDouble(temp8));
				tempBook.setPublicTime(temp9);
					
				fileWriter.write(String.valueOf(tempBook.getNO())+" "+tempBook.getName()+" "+tempBook.getSort()+" "+
						tempBook.getHolder()+" "+tempBook.getDeadline()+" "+tempBook.getISBN()+" "+tempBook.getAuthor()+" "+
						tempBook.getPublisher()+" "+String.valueOf(tempBook.getPrice())+" "+tempBook.getPublicTime()+" "+
						"\r\n");
				fileWriter.flush();
			}
			fileWriter.close();
			}else{
				return false;
			}
		}catch (IOException ie) {
			System.err.println("error:" + ie.getMessage());
			flagFind = false;
		}
		return flagFind;	
	}
	
	//添加书
	public Boolean bookAdd(String name,String sort,String isbn,String author,String publisher,Double price,String publicTime){     //添加书
		String r,temp1,temp2,temp3,temp4,temp5,temp6,temp7,temp8,temp9,temp0;
		try{
		FileReader fileReader = new FileReader("Library.txt");
		BufferedReader bufferReader = new BufferedReader(fileReader);
		Writer fileWriter = new FileWriter("temp.txt", false);
		while ((r = bufferReader.readLine()) != null) {
			StringTokenizer toKen_Student = new StringTokenizer(r);
			temp0=toKen_Student.nextToken();
			temp1=toKen_Student.nextToken();
			temp2=toKen_Student.nextToken();
			temp3=toKen_Student.nextToken();
			temp4=toKen_Student.nextToken();
			temp5=toKen_Student.nextToken();
			temp6=toKen_Student.nextToken();
			temp7=toKen_Student.nextToken();
			temp8=toKen_Student.nextToken();
			temp9=toKen_Student.nextToken();
			tempBook.setNO(Integer.parseInt(temp0));
			tempBook.setName(temp1);
			tempBook.setSort(temp2);
			tempBook.setHolder(temp3);
			tempBook.setDeadline(temp4);
			tempBook.setISBN(temp5);
			tempBook.setAuthor(temp6);
			tempBook.setPublisher(temp7);
			tempBook.setPrice(Double.parseDouble(temp8));
			tempBook.setPublicTime(temp9);
					
			if(tempBook.getName().equals(name)){
				return false;
			}
					
			fileWriter.write(String.valueOf(tempBook.getNO())+" "+tempBook.getName()+" "+tempBook.getSort()+" "+
					tempBook.getHolder()+" "+tempBook.getDeadline()+" "+tempBook.getISBN()+" "+tempBook.getAuthor()+" "+
					tempBook.getPublisher()+" "+String.valueOf(tempBook.getPrice())+" "+tempBook.getPublicTime()+" "+
					"\r\n");
			fileWriter.flush();
			}
		
		fileWriter.close();
		Book newBook = new Book(name,sort,isbn,author,publisher,price,publicTime);
				
		fileReader = new FileReader("temp.txt");
		bufferReader = new BufferedReader(fileReader);
		fileWriter = new FileWriter("Library.txt", false);
		while ((r = bufferReader.readLine()) != null) {
			StringTokenizer toKen_Student = new StringTokenizer(r);
			temp0=toKen_Student.nextToken();
			temp1=toKen_Student.nextToken();
			temp2=toKen_Student.nextToken();
			temp3=toKen_Student.nextToken();
			temp4=toKen_Student.nextToken();
			temp5=toKen_Student.nextToken();
			temp6=toKen_Student.nextToken();
			temp7=toKen_Student.nextToken();
			temp8=toKen_Student.nextToken();
			temp9=toKen_Student.nextToken();
			tempBook.setNO(Integer.parseInt(temp0));
			tempBook.setName(temp1);
			tempBook.setSort(temp2);
			tempBook.setHolder(temp3);
			tempBook.setDeadline(temp4);
			tempBook.setISBN(temp5);
			tempBook.setAuthor(temp6);
			tempBook.setPublisher(temp7);
			tempBook.setPrice(Double.parseDouble(temp8));
			tempBook.setPublicTime(temp9);
					
			fileWriter.write(String.valueOf(tempBook.getNO())+" "+tempBook.getName()+" "+tempBook.getSort()+" "+
					tempBook.getHolder()+" "+tempBook.getDeadline()+" "+tempBook.getISBN()+" "+tempBook.getAuthor()+" "+
					tempBook.getPublisher()+" "+String.valueOf(tempBook.getPrice())+" "+tempBook.getPublicTime()+" "+
					"\r\n");
			fileWriter.flush();
			if(tempBook.getNO()== newBook.getNO()-1)