Java Baidu Translation APIを使用して中国語とオランダ語の相互翻訳を実現する際の技術的問題

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.*;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

public class Translation {
    public static void main(String[] args) {
        try {
            String apiKey = "YourAPIKey"; // 替换成你自己的API Key
            String from = "zh"; // 翻译源语言为中文
            String to = "nl"; // 翻译目标语言为荷兰语
            String query = "你好"; // 要翻译的文本
            
            String translationResult = translate(apiKey, from, to, query);
            System.out.println("翻译结果：" + translationResult);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static String translate(String apiKey, String from, String to, String query) throws Exception {
        // 将查询文本进行URL编码
        String encodedQuery = URLEncoder.encode(query, StandardCharsets.UTF_8);

        // 构建API请求URL
        String urlStr = "http://api.fanyi.baidu.com/api/trans/vip/translate?" +
                "q=" + encodedQuery +
                "&from=" + from +
                "&to=" + to +
                "&appid=" + apiKey +
                "&salt=" + UUID.randomUUID().toString().substring(0, 10) +
                "&sign=" + MD5(apiKey + query + salt + appSecret);

        // 发送HTTP GET请求
        HttpURLConnection connection = (HttpURLConnection) new URL(urlStr).openConnection();
        connection.setRequestMethod("GET");

        // 读取API返回的JSON数据
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        StringBuilder response = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            response.append(line);
        }
        reader.close();

        // 解析JSON数据
        JsonElement jsonElement = JsonParser.parseString(response.toString());
        JsonObject jsonObject = jsonElement.getAsJsonObject();
        JsonArray translationArray = jsonObject.get("trans_result").getAsJsonArray();

        // 提取翻译结果
        List<String> translations = new ArrayList<>();
        for (JsonElement element : translationArray) {
            JsonObject translationObject = element.getAsJsonObject();
            String result = translationObject.get("dst").getAsString();
            translations.add(result);
        }

        // 返回翻译结果
        return String.join(", ", translations);
    }
}