HttpClient.post是成功的，但没有将数据发送到json

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public class Main {
    public static void main(String[] args) throws IOException {
        HttpClient httpClient = HttpClients.createDefault();
        
        // 创建 HTTP POST 请求
        HttpPost httpPost = new HttpPost("https://api.example.com/endpoint");
        
        // 创建要发送的数据对象
        JSONObject data = new JSONObject();
        data.put("key1", "value1");
        data.put("key2", "value2");
        
        // 将数据转换为 JSON 字符串
        String jsonData = JSON.toJSONString(data);
        
        // 设置请求的 Content-Type
        httpPost.setHeader("Content-Type", "application/json");
        
        // 设置请求的内容为 JSON 数据
        httpPost.setEntity(new StringEntity(jsonData));
        
        // 发送请求并获取响应
        HttpResponse response = httpClient.execute(httpPost);
        
        // 解析响应
        HttpEntity responseEntity = response.getEntity();
        if (responseEntity != null) {
            String responseString = EntityUtils.toString(responseEntity);
            System.out.println("Response: " + responseString);
        }
    }
}