用于替换包含算术运算符的文件中的单词的Java代码

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class WordReplacement {
    public static void main(String[] args) {
        String inputFile = "input.txt";
        String outputFile = "output.txt";
        Map<String, String> replacements = new HashMap<>();
        replacements.put("add", "sum");
        replacements.put("subtract", "difference");
        replacements.put("multiply", "product");
        replacements.put("divide", "quotient");

        try {
            BufferedReader reader = new BufferedReader(new FileReader(inputFile));
            FileWriter writer = new FileWriter(outputFile);
            String line;
            while ((line = reader.readLine()) != null) {
                String replacedLine = replaceWords(line, replacements);
                writer.write(replacedLine + "\n");
            }
            reader.close();
            writer.close();
            System.out.println("Word replacement completed successfully.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static String replaceWords(String line, Map<String, String> replacements) {
        StringBuilder replacedLine = new StringBuilder();
        Pattern pattern = Pattern.compile("\\b\\w+\\b");
        Matcher matcher = pattern.matcher(line);
        while (matcher.find()) {
            String word = matcher.group();
            if (replacements.containsKey(word)) {
                word = replacements.get(word);
            }
            replacedLine.append(word).append(" ");
        }
        return replacedLine.toString().trim();
    }
}