在ChatGPT的API中支持多轮对话的实现方法

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
 
public class Chatbot {
    private static final String API_ENDPOINT = "https://api.openai.com/v1/engines/davinci-codex/completions";
 
    private String context = null;
 
    public String sendMessage(String message) throws Exception {
        URL url = new URL(API_ENDPOINT);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 
        // 设置请求头
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "application/json");
        connection.setRequestProperty("Authorization", "Bearer <your_api_key>");
 
        // 构造请求体
        String requestBody;
        if (context == null) {
            requestBody = String.format("{\"prompt\": \"%s\"}", message);
        } else {
            requestBody = String.format("{\"prompt\": \"%s\", \"context\": \"%s\"}", message, context);
        }
 
        // 发送请求
        connection.setDoOutput(true);
        OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream());
        writer.write(requestBody);
        writer.flush();
        writer.close();
 
        // 读取响应
        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        StringBuilder responseBuilder = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            responseBuilder.append(line);
        }
        reader.close();
 
        // 解析响应
        String response = responseBuilder.toString();
        context = extractContext(response);
 
        return extractResponse(response);
    }
 
    private String extractResponse(String response) {
        // 从响应中提取出 ChatGPT 返回的文本
        // 这里需要根据具体的 API 返回格式来进行解析
        return "";
    }
 
    private String extractContext(String response) {
        // 从响应中提取出下一轮对话所需要的 context
        // 这里需要根据具体的 API 返回格式来进行解析
        return "";
    }
}