读取文本文件引发异常

Question

所以我使用了DataInputStream、FileInputStream、BufferInputStream、FileReader、BufferedReader、Scanner。它们都抛出FileNOtFoundException或CorruptedStreamException。

import java.io.*;
import java.util.ArrayList;

/**
 * Class to load account files
 */
public class AccountLoader {

    /**
     * Add an account file
     * @param newAccount 
     */
    public static void addAcountFile(Account newAccount) {
        try {
            PrintWriter out = new PrintWriter(new File("Accounts.txt"));

            out.print(" " + newAccount.getOwner().getName());
            System.out.println("saved account " + newAccount.getOwner().getName());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }


    public static ArrayList<Account> loadAccountsList() throws EOFException, IOException, ClassNotFoundException{
        ArrayList<Account> accounts = new ArrayList();

            FileReader load = new FileReader("Accounts.txt");

            String file = load.toString();

           String[] accountsload = file.split(" ");
           for (String string : accountsload){
               accounts.add(loadAccount(string + ".data"));
           }
           load.close();
           return accounts;

    }
    public static void save(Account account) {

        String filename = account.getOwner().getName() + ".data" ; 
            if (filename != null) {         
          try {
             FileOutputStream fos = new FileOutputStream(filename); 

            ObjectOutputStream out = new ObjectOutputStream(fos); 


            out.writeObject(account);    

            out.flush();                    
            out.close();                        
          }

          catch (IOException e) { System.out.println(e); }
        }

      }

     public static Account loadAccount(String filename) {   
           Account newAccount = null;
            if (filename != null) {           
              try {

                FileInputStream fis = new FileInputStream(filename); 

                ObjectInputStream in = new ObjectInputStream(fis);  

                newAccount = (Account)in.readObject();
                in.close();                                     
              }

              catch (Exception e) { System.out.println(e); }
            }
            return newAccount;
          }

}

Answer 1

您可能需要将文本文件放在“Project Root”文件夹（包含src和bin的文件夹）中，而不是bin文件夹中。如果您是从Eclipse运行这一点，那肯定是您需要做的，因为从Eclipse运行的Java项目的上下文始终是该项目的Eclipse project文件夹。

当您要求Java按名称打开一个文件而不给它路径时，JVM将在其当前工作目录中查找该文件。当前的工作目录根据您运行程序的方式而改变，在您的情况下，看起来“bin”文件夹不是您当前的工作目录。