Java编写代码实现微信机器人对接chatgpt

要实现微信机器人对接ChatGPT，你需要使用Java编写代码并调用ChatGPT的API，以下是一个简单的实现示例：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;

public class WeChatBot {
    private String chatGptUrl = "https://api.openai.com/v1/engines/davinci-codex/completions";
    private String apiKey = "YOUR_API_KEY";
    
    public String getResponse(String message) throws IOException {
        String encodedMessage = URLEncoder.encode(message, "UTF-8");
        URL url = new URL(chatGptUrl + "?prompt=" + encodedMessage);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "application/json");
        connection.setRequestProperty("Authorization", "Bearer " + apiKey);
        connection.setDoOutput(true);
        
        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String inputLine;
        StringBuilder response = new StringBuilder();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        
        return response.toString();
    }
}

上面的代码创建了一个`WeChatBot`类，其中`chatGptUrl`是ChatGPT API的URL，`apiKey`是你的API密钥。`getResponse`方法用于获取ChatGPT的回复，它将发送一个POST请求到ChatGPT API，并返回响应。

接下来，你需要将这个类与微信机器人对接。你可以使用微信公众号开发者平台提供的Java SDK，或第三方的Java SDK，例如Weixin-java-tools。以下是一个使用Weixin-java-tools的示例：

import me.chanjar.weixin.common.api.WxConsts;
import me.chanjar.weixin.common.api.WxMessageRouter;
import me.chanjar.weixin.common.session.StandardSessionManager;
import me.chanjar.weixin.mp.api.WxMpConfigStorage;
import me.chanjar.weixin.mp.api.WxMpInMemoryConfigStorage;
import me.chanjar.weixin.mp.api.WxMpMessageHandler;
import me.chanjar.weixin.mp.api.WxMpMessageRouter;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.api.impl.WxMpServiceImpl;
import me.chanjar.weixin.mp.bean.message.WxMpXmlMessage;
import me.chanjar.weixin.mp.bean.message.WxMpXmlOutMessage;
import me.chanjar.weixin.mp.bean.message.WxMpXmlOutTextMessage;
import me.chanjar.weixin.mp.bean.result.WxMpOAuth2AccessToken;
import me.chanjar.weixin.mp.builder.outxml.TextBuilder;
import me.chanjar.weixin.mp.config.WxMpConfig;
import me.chanjar.weixin.mp.config.impl.WxMpDefaultConfigImpl;
import me.chanjar.weixin.mp.util.crypto.WxMpCryptUtil;

import java.io.IOException;
import java.util.concurrent.TimeUnit;

public class WeChatBot {
    private String chatGptUrl = "https://api.openai.com/v1/engines/davinci-codex/completions";
    private String apiKey = "YOUR_API_KEY";
    
    private WxMpService wxMpService;
    private WxMpConfig wxMpConfig;
    private WxMpMessageRouter wxMpMessageRouter;
    
    public WeChatBot(String appId, String appSecret, String token, String aesKey) {
        wxMpConfig = new WxMpDefaultConfigImpl();
        wxMpConfig.setAppId(appId);
        wxMpConfig.setSecret(appSecret);
        wxMpConfig.setToken(token);
        wxMpConfig.setAesKey(aesKey);
        
        wxMpService = new WxMpServiceImpl();
        wxMpService.setWxMpConfigStorage(wxMpConfig);
        
        wxMpMessageRouter = new WxMpMessageRouter(wxMpService);
        wxMpMessageRouter.rule().async(false).msgType(WxConsts.XmlMsgType.TEXT)
                .handler(new WxMpMessageHandler() {
                    @Override
                    public WxMpXmlOutMessage handle(WxMpXmlMessage wxMessage, WxMpService wxMpService) throws Exception {
                        String message = wxMessage.getContent();
                        String response = getResponse(message);
                        return new TextBuilder().content(response).build();
                    }
                }).end();
    }
    
    public void start() {
        wxMpService.setMessageRouter(wxMpMessageRouter);
        wxMpService.setSessionManager(new StandardSessionManager());
        wxMpService.getAccessToken();
        wxMpService.getJsapiTicket();
        wxMpService.getCardApiTicket();
        wxMpService.scheduleAccessTokenJob(1, TimeUnit.HOURS);
    }
    
    public String getResponse(String message) throws IOException {
        String encodedMessage = URLEncoder.encode(message, "UTF-8");
        URL url = new URL(chatGptUrl + "?prompt=" + encodedMessage);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Content-Type", "application/json");
        connection.setRequestProperty("Authorization", "Bearer " + apiKey);
        connection.setDoOutput(true);
        
        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String inputLine;
        StringBuilder response = new StringBuilder();
        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();
        
        return response.toString();
    }
}

这个示例中，`WeChatBot`类在构造函数中创建了一个`WxMpService`对象和一个`WxMpMessageRouter`对象，并将其绑定在一起。在`start`方法中，它将`WxMpService`对象的`messageRouter`属性设置为`WxMpMessageRouter`对象，并配置`WxMpService`对象的一些属性，例如定时刷新access token的任务。

`WxMpMessageRouter`对象使用`rule`方法创建一个规则，当收到文本类型的消息时，使用`WxMpMessageHandler`对象处理消息。在`WxMpMessageHandler`对象的`handle`方法中，它将收到的消息发送给ChatGPT API，并返回ChatGPT的回复。

请注意，在实际使用中，你需要将`YOUR_API_KEY`替换为你的API密钥，并将`appId`、`appSecret`、`token`和`aesKey`替换为你的微信公众号的配置。