如何使用java从文本文件中删除重复的单词

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

public class RemoveDuplicateWords {
    public static void main(String[] args) {
        String inputFilePath = "input.txt"; // 输入文件路径
        String outputFilePath = "output.txt"; // 输出文件路径

        try {
            // 读取文件内容
            List<String> lines = Files.readAllLines(Paths.get(inputFilePath));
            StringBuilder sb = new StringBuilder();
            for (String line : lines) {
                sb.append(line).append(" ");
            }
            String content = sb.toString();

            // 分割单词并去重
            Set<String> uniqueWords = new HashSet<>(Arrays.asList(content.split("\\s+")));

            // 将去重后的单词写回文件
            List<String> uniqueWordList = new ArrayList<>(uniqueWords);
            Files.write(Paths.get(outputFilePath), uniqueWordList, StandardCharsets.UTF_8);

            System.out.println("重复单词已删除，结果已保存到 " + outputFilePath);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}