java - 制作Java I/O并更改文件以在java中分割

Question

我正在制作一个使用 java I/O 的项目

我有一个包含以下数据的文件:

170631|0645| |002014 | 0713056699|000000278500155414|0606| |002014 | 0913042385|000001220000000002|0000|0000|00000000000|0000000000000000|000000299512

我想要的输出如下:

170631

0645

002014

文件，这样数据就会减少下来这是我的源代码:

public class Tes {
public static void main(String[] args) throws IOException{
    File file;
    BufferedReader br =null;
    FileOutputStream fop = null;
    try {
        String content = "";
        String s;
        file = new File("E:/split/OUT/Berhasil.RPT");
        fop = new FileOutputStream(file);
        br = new BufferedReader(new FileReader("E:/split/11072014/01434.RPT"));
        if (!file.exists()) {
            file.createNewFile();
        }
        while ((s = br.readLine()) != null ) {
            for (String retVal : s.split("\\|")) {
                
                String data = content.concat(retVal);
                System.out.println(data.trim());        
                byte[] buffer = data.getBytes();
                fop.write(buffer);
                fop.flush();
                fop.close();
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}
}

我想要的是根据已输入的数据生成如上所述的输出

文件输入 -> 分割 -> 文件输出

谢谢:)

Answer 1

我认为您忘记提及您面临的问题。仅通过查看代码，似乎每次在编写分割线时循环时都会关闭 fop(FileOutputStream) 。一旦您在 while 循环之外写入了所有内容，就应该关闭 outputStream。

import java.io.*;

public class FileReadWrite {

public static void main(String[] args) {
    try {
        FileReader inputFileReader = new FileReader(new File("E:/split/11072014/01434.RPT"));
        FileWriter outputFileWriter = new FileWriter(new File("E:/split/11072014/Berhasil.RPT"));
        BufferedReader bufferedReader = new BufferedReader(inputFileReader);
        BufferedWriter bufferedWriter = new BufferedWriter(outputFileWriter);
        String line;
        while ((line = bufferedReader.readLine()) != null) {
            for (String splitItem : line.split("|")) {
                bufferedWriter.write(splitItem + "\n");
            }
        }
        bufferedWriter.flush();
        bufferedWriter.close();
        bufferedReader.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
}