复制文件内容包含从一个文件到另一个文件的整数数据

Question

我创建了一个名为random.txt文件。

我的工作是从该文件中获取输入，然后使用ObjectOutputStream将其存储到另一个文件中。

我已经为此编写了代码，但出现了以下错误：

Exception in thread "main" java.io.EOFException
    at java.io.DataInputStream.readInt(Unknown Source)
    at java.io.ObjectInputStream$BlockDataInputStream.readInt(Unknown Source)
    at java.io.ObjectInputStream.readInt(Unknown Source)
    at SortingNumberFile.main(SortingNumberFile.java:13)

我的代码是：

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

public class SortingNumberFile {
  public static void main(String []args) throws IOException {
    FileInputStream fis = new FileInputStream("D:\\Programs\\AJP\\random.txt");
    ObjectInputStream ois = new ObjectInputStream(fis);
    File f = new File("D:\\Programs\\AJP\\sort.txt");
    FileOutputStream fos = new FileOutputStream(f);
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    int i;

    while ((i=ois.readInt())!=-1) {
      oos.writeInt(i);
      System.out.println(i);
    }

    fis.close();
    ois.close();
    fos.close();
    oos.close();

    System.out.println("Done !!!");
  }
}

Answer 1

您最好对Java 7或更高版本中的try with resources使用try with resources以消除许多异常处理负担。 解决方案之一可以是：

    try (Scanner scanner = new Scanner(new File(inputPath));
         BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(outputPath))) {
         while (scanner.hasNextInt()) {
            int a = scanner.nextInt();
            bufferedWriter.write(String.valueOf(a) + "\n"); 
            // seems you're using Windows, so it should be replace with \r\n perhaps;
            System.out.println(a);
        }
    }
    System.out.println("Done !!!");

测试数据（相同的输入格式和输出格式）：

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