使用gson构建Body请求体

依赖：

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.8</version>
</dependency>

http请求实例：

curl https://api.deepseek.com/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <DeepSeek API Key>" \
  -d '{
        "model": "deepseek-chat",
        "messages": [
          {"role": "system", "content": "You are a helpful assistant."},
          {"role": "user", "content": "Hello!"}
        ],
        "stream": false
      }'

使用gson构建请求体：

        // 使用 Gson 构建请求体
        JsonObject requestBodyJson = new JsonObject();
        requestBodyJson.addProperty("model", "deepseek-chat");

        //创建一个json数组来表示messages
        JsonArray messagesArray = new JsonArray();

        //role content
        JsonObject systemMessage = new JsonObject();
        systemMessage.addProperty("role", "system");
        systemMessage.addProperty("content", "You are a helpful assistant.");
        messagesArray.add(systemMessage);

        //role content
        JsonObject userMessage = new JsonObject();
        userMessage.addProperty("role", "user");
        userMessage.addProperty("content", "Hello!");
        messagesArray.add(userMessage);

        requestBodyJson.add("messages", messagesArray);
        requestBodyJson.addProperty("stream", false);

        Gson gson = new Gson();
        String jsonBody = gson.toJson(requestBodyJson);

        MediaType JSON = MediaType.parse("application/json; charset=utf-8");
        RequestBody body = RequestBody.create(JSON, jsonBody);
        Request request = new Request.Builder()
                .url("https://api.deepseek.com/chat/completions")
                .post(body)
                .addHeader("Content-Type", "application/json")
                .addHeader("Authorization", "Bearer " + apiKey)
                .build();