微信公众号设计网站网站建设技术选择
💻目录
- 一、介绍
- 1、使用技术
- 2、效果
- 二、代码
- 1、前端代码
- 2、后端代码
- 2.1、maven依赖
- 2.2、model
- 2.2.1、请求接口的格式
- 2.2.2、响应数据对象
- 2.3、工具类
- 2.3.1、🔴使用WebClient调用`chatgpt`方法
- 2.3.2、🟠 webSocket连接对话方法
- 2.4、Controller
一、介绍
通过java实现对chatGPT的API接口实现websocket流式输出以及接口调用两种方式代码
1、使用技术
使用到的技术包括WebClient、webSocket加thymeleaf
WebClient：客户端的使用可以开 🍅java http客户端webSocket：可以看🥒webSokcet 使用thymeleaf：可以网上直接找教程，我使用的比较简单会掉用就行，或者使用html静态页面也可以
2、效果
- websocket的具体实现效果如下，非专业前端，页面比较简陋，可以自行优化页面
- 接口调用
二、代码
1、前端代码
<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>Java后端WebSocket的Tomcat实现</title><script type="text/javascript" src="js/jquery.min.js"></script>
</head><body><strong>ChatGPT使用</strong><br /><input id="text" type="text" onkeydown="checkEnter(event)"/>
<button onclick="send()">发送消息</button>
<hr />
<button onclick="closeWebSocket()">关闭WebSocket连接</button>
<hr />
<div id="message"></div>
</body>
<script type="text/javascript">var websocket = null;//判断当前浏览器是否支持WebSocketif ('WebSocket' in window) {//改成你的地址websocket = new WebSocket("ws://localhost:8088/websocket/100");} else {alert('当前浏览器 Not support websocket')}//连接发生错误的回调方法websocket.onerror = function () {setMessageInnerHTML("WebSocket连接发生错误");};//连接成功建立的回调方法websocket.onopen = function () {setMessageInnerHTML("WebSocket连接成功");}var U01data, Uidata, Usdata//接收到消息的回调方法websocket.onmessage = function (event) {console.log(event);if (event.data !== "conn_success") {setMessageInnerHTML(event.data);// setMessageInnerHTML(event);setechart()}}//连接关闭的回调方法websocket.onclose = function () {setMessageInnerHTML("WebSocket连接关闭");}// //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。window.onbeforeunload = function () {closeWebSocket();}//将消息显示在网页上function setMessageInnerHTML(innerHTML) {document.getElementById('message').innerHTML += innerHTML ;}//关闭WebSocket连接function closeWebSocket() {websocket.close();}//发送消息function send() {var message = document.getElementById('text').value;websocket.send('{"msg":"' + message + '"}');setMessageInnerHTML("<br>--------------发送消息：" + message + "<br>");document.getElementById('text').value = null;}function checkEnter(event) {if (event.keyCode === 13) {send();}}
</script>
</html>
2、后端代码
2.1、maven依赖
<!--thymeleaf模版的--> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId><!--websocket的--> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-websocket</artifactId></dependency><!--webClient--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-webflux</artifactId></dependency> <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.22</version></dependency>
2.2、model
2.2.1、请求接口的格式
如果想简单的话也可以不用封装对象，直接使用json
- ChatGptRequestParameter
@Data
@NoArgsConstructor
@AllArgsConstructor
public class ChatGptRequestParameter {private String model = "gpt-3.5-turbo-16k-0613";
// 是否支持流式输出private boolean stream = true;// 请求对象数组List<ChatGptMessage> messages=new ArrayList();public void addMessages(ChatGptMessage message) {this.messages.add(message);}
}
- ChatGptMessage
@Data
@NoArgsConstructor
@AllArgsConstructor
public class ChatGptMessage implements Serializable {String role;String content;
}
2.2.2、响应数据对象
- ChatGptResponseParameter
@Data
@NoArgsConstructor
@AllArgsConstructor
public class ChatGptResponseParameter implements Serializable {String id;String object;String created;String model;Usage usage;List<Choices> choices;String system_fingerprint;
}
- Choices
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Choices implements Serializable {ChatGptMessage delta;String finish_reason;Integer index;String logprobs;
}- ChatGptMessage
@Data
@NoArgsConstructor
@AllArgsConstructor
public class ChatGptMessage implements Serializable {String role;String content;
}
2.3、工具类
2.3.1、🔴使用WebClient调用chatgpt方法
@Component
@Slf4j
public class WebChatGPT {/*** 自己chatGpt的ApiKey*/private String apiKey = "sk-***";private ChatGptRequestParameter chatGptRequestParameter = new ChatGptRequestParameter();/*** 推送* @param session webSocket会话对象* @param str 请求数据* @return Flux<String>*/public Flux<String> getAnswer(Session session, String str) {ChatGptMessage chatGptMessage = new ChatGptMessage("user", str);// 保存消息，用于记录前面的消息，方便上下文记忆，因为3.5不能自动实现上下文记忆chatGptRequestParameter.addMessages(chatGptMessage);return webClient().post().accept(MediaType.TEXT_EVENT_STREAM) //接收text/event-stream流的数据.body(BodyInserters.fromValue(chatGptRequestParameter)) //参数.retrieve() //执行请求并获取响应结果.bodyToFlux(String.class) // 将响应体转换为 Flux 类型，这里是将 SSE 流转换为字符串类型。.map(s -> { //对每个响应元素进行处理log.info("Gpt输出：{}", s);if (!Objects.equals(s, "[DONE]")) {ChatGptMessage message = JSONUtil.toBean(s, ChatGptResponseParameter.class).getChoices().get(0).getDelta();String content = message.getContent();if (content != null) {try {if (session != null) {
// 通过websocket回写到页面session.getBasicRemote().sendText(content);}log.info("Gpt输出：{}", s);} catch (IOException e) {e.printStackTrace();}return content;}}return "";}).onErrorResume(WebClientResponseException.class, ex -> Flux.just(ex.getResponseBodyAsString())) //请求失败.doFinally(signalType -> log.info("完成{}", signalType)); //在 Flux 完成时执行，无论是成功还是错误，都会打印日志表示请求完成。}private WebClient webClient(){return WebClient.builder()
// .clientConnector(new ReactorClientHttpConnector(
// HttpClient.create().proxy(proxy -> proxy.type(ProxyProvider.Proxy.HTTP).host("127.0.0.1").port(1080)) //代理
// )).defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE).defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE + ";charset=UTF-8").defaultHeader(HttpHeaders.AUTHORIZATION, "Bearer " + apiKey).baseUrl("https://api.openai.com/v1/chat/completions") //官方api请求地址.build();}
}
2.3.2、🟠 webSocket连接对话方法
通过该方法和html页面建立websocket连接
@Slf4j
@Service
@ServerEndpoint("/websocket/{uid}")
@Component
public class WebSocketServer2 {//连接建立时长private static final long sessionTimeout = 600000;// 用来存放每个客户端对应的WebSocketServer对象private static Map<String, WebSocketServer2> webSocketMap = new ConcurrentHashMap<>();// 与某个客户端的连接会话，需要通过它来给客户端发送数据private Session session;// 接收idprivate String uid;private static WebChatGPT webChatGPT;static {webChatGPT = SpringUtil.getBean(WebChatGPT.class);}/*** 连接建立成功调用的方法* @author zhengfuping* @date 2023/8/22* @param session* @param uid*/@OnOpenpublic void onOpen(Session session , @PathParam("uid") String uid){session.setMaxIdleTimeout(sessionTimeout);this.session = session;this.uid = uid;if (webSocketMap.containsKey(uid)){webSocketMap.remove(uid);}webSocketMap.put(uid,this);log.info("websocket连接成功编号uid: " + uid + "，当前在线数: " + getOnlineClients());try{// 响应客户端实际业务数据！sendMessage("conn_success");}catch (Exception e){log.error("websocket发送连接成功错误编号uid: " + uid + "，网络异常!!!");}}/*** 连接关闭调用的方法* @author zhengfuping* @date 2023/8/22*/@OnClosepublic void onClose(){try {if (webSocketMap.containsKey(uid)){webSocketMap.remove(uid);}log.info("websocket退出编号uid: " + uid + "，当前在线数为: " + getOnlineClients());} catch (Exception e) {log.error("websocket编号uid连接关闭错误: " + uid + "，原因: " + e.getMessage());}}/*** 收到客户端消息后调用chatGpt的方法* @param message 客户端发送过来的消息* @param session*/@OnMessagepublic void onMessage(String message, Session session) {try {JSON parse = JSONUtil.parse(message);String msg = parse.getByPath("msg").toString();if (StrUtil.isNotEmpty(msg)){
// 调用Flux<String> answer = webChatGPT.getAnswer(session, msg);// 触发实际的请求操作answer.subscribe();}} catch (Exception e) {log.error("websocket发送消息失败编号uid为: " + uid + ",报文: " + message);}}/*** 发生错误时调用* @param session* @param error*/@OnErrorpublic void onError(Session session, Throwable error) {log.error("websocket编号uid错误: " + this.uid + "原因: " + error.getMessage());error.printStackTrace();}/*** 实现服务器主动推送* @author yingfeng* @date 2023/8/22 10:11* @Param * @param null* @return*/public void sendMessage(String message) throws IOException {this.session.getBasicRemote().sendText(message);}/*** 获取客户端在线数* @author zhengfuping* @date 2023/8/22 10:11* @param*/public static synchronized int getOnlineClients() {if (Objects.isNull(webSocketMap)) {return 0;} else {return webSocketMap.size();}}}
2.4、Controller
- 跳转thymeleaf页的接口
@Controller
public class ChatWeb {@RequestMapping("/webSocket")public String webSocket(){return "webSocket";}
}
- ChatGptController：页面请求访问
@RestController
@RequestMapping("/chat")
public class ChatGptController {@Resourceprivate WebChatGPT webChatGPT;@GetMapping(value ="/stringFlux", produces = "application/json; charset=utf-8")public Flux<String> stringFlux(String c) {Flux<String> flux = webChatGPT.getAnswer(null,c);return flux;}
}