Java讀取文本文件

1、package library;import java.io.*;import java.util.ArrayList;/* * Created by Fantanstic boy on 2016/5/14. */public class LoadBorrower implements LoadInterfaceBorrow public void load(BorrowerDatabase borrowerDatabase) / TODO Auto-generated method stubString FileName2 = "users.txt"File myFile

2、 = new File(FileName2);if (!myFile.exists() System.err.println("Can't Find " + FileName2);ArrayList<String> str = new ArrayList<String>();try BufferedReader in = new BufferedReader(new FileReader(myFile);String temp;for (int i = 0; (temp = in.readLine() != null; i+) str.add

3、(temp);in.close(); catch (IOException e) e.getStackTrace();for (String s : str) String dataofborrower = s.split("_");Borrower borrower = new Borrower(dataofborrower0,dataofborrower1);borrowerDatabase.addBorrower(borrower);public void reload(BorrowerDatabase borrowerDatabase) / TODO Auto-ge

4、nerated method stubString FileName2 = "users.txt"File myFile = new File(FileName2);if (!myFile.exists() System.err.println("Can't Find " + FileName2);ArrayList<String> str = new ArrayList<String>();try BufferedWriter in = new BufferedWriter(new FileWriter(FileName

5、2);String temp;for (int i = 0; i < borrowerDatabase.getNumberOfBorrowers(); i+) Borrower borrower = borrowerDatabase.getBorrower(i);temp = borrower.getId() + "_" + borrower.getName() + "n"str.add(temp);String result = ""for (String s : str)result += s;in.write(result

6、);in.close(); catch (IOException e) e.getStackTrace();for (String s : str) String dataofborrower = s.split("_");Borrower borrower = new Borrower(dataofborrower0,dataofborrower1);borrowerDatabase.addBorrower(borrower);package library;import java.io.*;import java.util.*;import static java.la

7、ng.Integer.parseInt;/* * Created by Fantanstic boy on 2016/5/16. */public class LoadBorroweritems implements LoadInterfaceBorrow public void load(BorrowerDatabase borrowerDatabase) String FileName4 = "useritems.txt"File myFile = new File(FileName4);if (!myFile.exists() System.err.println(&

8、quot;Can't Find " + FileName4);ArrayList<String> str = new ArrayList<>();try BufferedReader in = new BufferedReader(new FileReader(myFile);String temp;for (int i = 0; (temp = in.readLine() != null; i+) str.add(temp);in.close(); catch (IOException e) e.getStackTrace();for (int j

9、= 0; j < str.size(); j+) String string = str.get(j);String items = string.split("&&");for (int i = 0; i < items.length; i+) String s = str.get(i);String item = s.split("_");CatalogItem catalogitem;if (item0.equals("音像") catalogitem = new Recording(item1, i

10、tem2,parseInt(item3), item0, true, item5, item6); else if (item0.equals("書籍") catalogitem = new Book(item1, item2, parseInt(item3),item0, true, item5, parseInt(item6); elsecontinue;borrowerDatabase.getBorrower(j).getBorrowerItems().addItem(catalogitem);public void reload(BorrowerDatabase b

11、orrowerDatabase) String FileName1 = "useritems.txt"File myFile = new File(FileName1);if (!myFile.exists() System.err.println("Can't Find " + FileName1);ArrayList<String> str = new ArrayList<>();try String temp;for (int i = 0; i < borrowerDatabase.getNumberOfBor

12、rowers(); i+) BorrowerItems items = borrowerDatabase.getBorrower(i).getBorrowerItems();for (int j = 0; j < items.getNumberOfItems(); j+) CatalogItem item = items.getItem(j);if (item.getType().equals("書籍")temp = "書籍_" + item.getCode() + "_" + item.getTitle()+ "_&

13、quot; + item.getYear() + "_"+ item.isAvailable() + "_"+ (Book) item).getAuthor() + "_"+ (Book) item).getNumberOfPages();elsetemp = "音像_" + item.getCode() + "_" + item.getTitle()+ "_" + item.getYear() + "_"+ item.isAvailable() + &q

14、uot;_"+ (Recording) item).getPerformer() + "_"+ (Recording) item).getFormat();if (j + 1 < items.getNumberOfItems()temp += "&&"str.add(temp);String result = ""for (String s : str)result += s + "n"BufferedWriter in = new BufferedWriter(new FileWr

15、iter(myFile);in.write(result);in.close(); catch (IOException e) e.getStackTrace();package library;import java.io.*;import java.util.ArrayList;import static java.lang.Integer.parseInt;/* * Created by Fantanstic boy on 2016/5/14. */public class LoadCatalog implements LoadInterfaceCatalog public void l

16、oad(Catalog catalog) String FileName1 = "catalog.txt"File myFile = new File(FileName1);if (!myFile.exists() System.err.println("Can't Find " + FileName1);ArrayList<String> str = new ArrayList<String>();try BufferedReader in = new BufferedReader(new FileReader(myFi

17、le);String temp;for (int i = 0; (temp = in.readLine() != null; i+) str.add(temp);in.close(); catch (IOException e) e.getStackTrace();for (String s : str) String item = s.split("_");CatalogItem catalogitem;/ 音像_v004_BlackSheep _2008_true_Gin Wigmore_Mp3if (item0.equals("音像") catal

18、ogitem = new Recording(item1, item2,parseInt(item3), item0,(new Boolean(item4).booleanValue(), item5, item6); else if (item0.equals("書籍") / 書籍_a001_Java編程思想_2007_true_B.E_880catalogitem = new Book(item1, item2, parseInt(item3),item0, (new Boolean(item4).booleanValue(),item5, parseInt(item6

19、); elsecontinue;catalog.addItem(catalogitem);/* * 用于結(jié)尾時(shí)對(duì)各文件的重寫 * * param catalog */public void reload(Catalog catalog) String FileName1 = "catalog.txt"File myFile = new File(FileName1);if (!myFile.exists() System.err.println("Can't Find " + FileName1);ArrayList<String>

20、str = new ArrayList<String>();try String temp;for (int i = 0; i < catalog.getNumberOfItems(); i+) CatalogItem item = catalog.getItem(i);if (item instanceof Book)/ 書籍_a001_Java編程思想_2007_true_B.E_880temp = "書籍_" + item.getCode() + "_" + item.getTitle() + "_"+ ite

21、m.getYear() + "_" + item.isAvailable() + "_"+ (Book) item).getAuthor() + "_"+ (Book) item).getNumberOfPages();/ 音像_v004_Black Sheep _2008_true_Gin Wigmore_Mp3elsetemp = "音像_" + item.getCode() + "_" + item.getTitle() + "_"+ item.getYear() +

22、"_" + item.isAvailable() + "_"+ (Recording) item).getPerformer() + "_"+ (Recording) item).getFormat();str.add(temp);String result = ""for (String s : str)result += s + "n"BufferedWriter in = new BufferedWriter(new FileWriter(myFile);in.write(result);

23、in.close(); catch (IOException e) e.getStackTrace();package library;public interface LoadInterfaceBorrow void load(BorrowerDatabase database);void reload(BorrowerDatabase database);package library;public interface LoadInterfaceCatalog void load(Catalog catalog);void reload(Catalog catalog);package l

24、ibrary;public interface LoadInterfaceManager void load(ManagerDatabase database);void reload(ManagerDatabase database);package library;import java.io.*;import java.util.*;/* * Created by Fantanstic boy on 2016/5/14. */public class LoadManager implements LoadInterfaceManager public void load(ManagerD

25、atabase managerDatabase) String FileName3 = "managers.txt"File myFile = new File(FileName3);if (!myFile.exists() System.err.println("Can't Find " + FileName3);ArrayList<String> str = new ArrayList<String>();try BufferedReader in = new BufferedReader(new FileReader(myFile);String temp;for (int i = 0; (temp = in.readLine() != null; i+) str.add(temp);in.close(); catch (IOException e) e.getStackTrace();for (String s : str) String dataOfManager = s.split("_");Manager manager = new Manager(dataOfManager0, dataOfManager1);managerDat