如何使用Apache HttpClient发布非JSON请求？

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.util.ArrayList;
import java.util.List;

public class HttpClientExample {
    public static void main(String[] args) {
        HttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost httpPost = new HttpPost("http://example.com/api/endpoint");

        // 设置请求参数
        List<NameValuePair> params = new ArrayList<>();
        params.add(new BasicNameValuePair("param1", "value1"));
        params.add(new BasicNameValuePair("param2", "value2"));
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(params));

            // 发布请求并获取响应
            HttpResponse response = httpClient.execute(httpPost);
            HttpEntity entity = response.getEntity();

            // 处理响应
            if (entity != null) {
                String responseString = EntityUtils.toString(entity);
                System.out.println(responseString);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}