MVC 架构与 DDD 架构简单对比 MVC 架构：老项目将 controller、service、manager、dao、bean 按照系统模块分在一起，随着项目发展每个包中对象逐渐膨胀，导致维护困难、bug 难查 DDD 架构：新项目按照功能模块划分包，每个包维护自己的 controller、service、manager、dao、bean，每次进行开发与维护仅需找到对应功能包即可
创建 Maven 的父子工程 子工程使用：New Module 创建，每个子工程也是一个 Maven 父子工程 Maven 项目的 <groupId> 相同，<artifactId> 不同 父工程 pom.xml 文件使用 <modules><module> 添加子工程的 <artifactId> 父工程 pom.xml 文件使用 <dependencyManagement> 定义子工程依赖的版本号 ChatGPT 文档：https://platform.openai.com/docs/quickstart/introduction 创建 API 密钥（注意保密，同时有调用限制，超过需要付费） 使用 Http Post 连接，注意请求头和请求体参数 即使挂上全局连接规则，也可能调用超时、SSL 握手失败等异常，可以尝试代理javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshakeCaused by: java.io.EOFException: SSL peer shut down incorrectly public class OpenAI implements IOpenAI {Logger logger = LoggerFactory.getLogger(OpenAI.class);/*** 调用 OpenAI 接口回答问题，返回过节*/@Overridepublic String doChatGPT(String url, String openAiKey, String question) throws IOException {CloseableHttpClient httpClient = HttpClientBuilder.create().build();// 代理地址；open.aiproxy.xyz、open2.aiproxy.xyzHttpPost httpPost = new HttpPost(url);httpPost.setHeader("Content-Type", "application/json");httpPost.setHeader("Authorization", "Bearer " + openAiKey);String paramJson = "{ \"model\": \"gpt-3.5-turbo\", \"messages\": [{\"role\": \"user\", \"content\": \""+ question + "\"}], \"temperature\": 0.7, \"max_tokens\": 1024}";StringEntity stringEntity = new StringEntity(paramJson, ContentType.create("text/json", "UTF-8"));httpPost.setEntity(stringEntity);/*** 返回参数：* answerResponse:HttpResponseProxy{HTTP/1.1 200 OK [Server: nginx/1.18.0 (Ubuntu), Date: Wed, 29 Mar 2023* 15:36:21 GMT, Content-Type: application/json, Content-Length: 331, Connection: keep-alive,* Access-Control-Allow-Origin: *, Cache-Control: no-cache, must-revalidate, Openai-Model:* gpt-3.5-turbo-0301, Openai-Organization: user-bh0urjiu2k9hkov1mvwdxgph, Openai-Processing-Ms: 1515,* Openai-Version: 2020-10-01, Strict-Transport-Security: max-age=15724800; includeSubDomains,* X-Ratelimit-Limit-Requests: 20, X-Ratelimit-Remaining-Requests: 19, X-Ratelimit-Reset-Requests: 3s,* X-Request-Id: da3fb352a87ae33b10d11f309dc1c200] ResponseEntityProxy{[Content-Type: application/json,* Content-Length: 331,Chunked: false]}}* 2023-03-29 23:36:22.007 INFO 26301 --- [extShutdownHook] o.s.s.concurrent.ThreadPoolTaskExecutor :* Shutting down ExecutorService 'applicationTaskExecutor'*/CloseableHttpResponse response = httpClient.execute(httpPost);logger.info("response:{}", response);if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {String json = EntityUtils.toString(response.getEntity());logger.info("response.getEntity:{}", json);OpenAIAnswer openAIAnswer = JSON.parseObject(json, OpenAIAnswer.class);StringBuilder answers = new StringBuilder();List<Choices> choicesList = openAIAnswer.getChoices();for (Choices choices : choicesList) {answers.append(choices.getText());}return openAIAnswer.toString();} else {throw new RuntimeException("doChatGPT Api Error Code is " + response.getStatusLine().getStatusCode());}}
}
