从文件中读取十六进制Unicode字符串并将其转换为Java字符串？

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class HexUnicodeReader {
    public static void main(String[] args) {
        String filePath = "path/to/file.txt"; // 文件路径

        try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(filePath)))) {
            String line;
            while ((line = reader.readLine()) != null) {
                String unicodeString = line.trim(); // 假设每行只包含一个十六进制Unicode字符串
                String javaString = convertUnicodeToString(unicodeString);
                System.out.println(javaString);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static String convertUnicodeToString(String unicodeString) {
        StringBuilder sb = new StringBuilder();
        int index = 0;
        while (index < unicodeString.length()) {
            String hex = unicodeString.substring(index, index + 4); // 每个Unicode字符占4个十六进制数字
            int codePoint = Integer.parseInt(hex, 16);
            sb.append((char) codePoint);
            index += 4;
        }
        return sb.toString();
    }
}