httpClientUtil的post请求

post请求的写法，带请求头和请求体：

代码：

import org.apache.http.HttpEntity;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.springframework.stereotype.Component;

import java.io.IOException;
import java.util.Map;

@Component
public class HttpRequestPostServiceImpl implements HttpRequestPostService {
    CloseableHttpClient httpClient = HttpClients.createDefault();

    @Override
    public String doPostHttpRequest(String url, Map<String, String> headerMap, String requestBody) {
        String entityStr = null;
        CloseableHttpResponse response = null;
        try {
            HttpPost post = new HttpPost(url);
            //添加头部信息
            for (Map.Entry<String, String> header : headerMap.entrySet()) {
                post.addHeader(header.getKey(), header.getValue());
            }
            HttpEntity entity = new StringEntity(requestBody, "Utf-8");
            System.out.println("请求体是：" + requestBody);
            post.setEntity(entity);
            response = httpClient.execute(post);
            // 获得响应的实体对象
            HttpEntity httpEntity = response.getEntity();
            // 使用Apache提供的工具类进行转换成字符串
            entityStr = EntityUtils.toString(httpEntity, "UTF-8");
            System.out.println("POST请求路径：" + post);
            System.out.println("POST请求结果：" + entityStr);
        } catch (ClientProtocolException e) {
            System.err.println("Http协议出现问题");
            e.printStackTrace();
        } catch (ParseException e) {
            System.err.println("解析错误");
            e.printStackTrace();
        } catch (IOException e) {
            System.err.println("IO异常");
            e.printStackTrace();
        }
        return entityStr;
    }
}