Java如何从文本文件中排序

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

public class FileSorting {
    public static void main(String[] args) {
        try {
            // 读取文本文件
            FileReader fileReader = new FileReader("input.txt");
            BufferedReader bufferedReader = new BufferedReader(fileReader);

            List<Integer> numbers = new ArrayList<>();

            String line;
            while ((line = bufferedReader.readLine()) != null) {
                // 解析数据
                int number = Integer.parseInt(line);
                numbers.add(number);
            }

            // 排序数据
            Collections.sort(numbers);

            // 写入排序后的数据
            FileWriter fileWriter = new FileWriter("output.txt");
            BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);

            for (int number : numbers) {
                bufferedWriter.write(Integer.toString(number));
                bufferedWriter.newLine();
            }

            bufferedWriter.close();
            bufferedReader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}