HttpClient工具类的使用

package com.hourui.gmall.util;

        import org.apache.http.HttpEntity;
        import org.apache.http.HttpStatus;
        import org.apache.http.client.entity.UrlEncodedFormEntity;
        import org.apache.http.client.methods.CloseableHttpResponse;
        import org.apache.http.client.methods.HttpGet;
        import org.apache.http.client.methods.HttpPost;
        import org.apache.http.impl.client.CloseableHttpClient;
        import org.apache.http.impl.client.HttpClients;
        import org.apache.http.message.BasicNameValuePair;
        import org.apache.http.util.EntityUtils;

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

public class HttpclientUtil {

    public static String doGet(String url)   {
        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();
        // 创建http GET请求
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = null;
        try {
            // 执行请求
            response = httpclient.execute(httpGet);
            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                HttpEntity entity = response.getEntity();
                String result = EntityUtils.toString(entity, "UTF-8");
                EntityUtils.consume(entity);
                httpclient.close();
                return result;
            }
            httpclient.close();
        }catch (IOException e){
            e.printStackTrace();
            return null;
        }
        return  null;
    }

    public static String doPost(String url, Map<String,String> paramMap)   {
        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();
        // 创建http Post请求
        HttpPost httpPost = new HttpPost(url);
        CloseableHttpResponse response = null;
        try {
            List<BasicNameValuePair> list=new ArrayList<>();
            for (Map.Entry<String, String> entry : paramMap.entrySet()) {
                list.add(new BasicNameValuePair(entry.getKey(),entry.getValue())) ;
            }
            HttpEntity httpEntity=new UrlEncodedFormEntity(list,"utf-8");

            httpPost.setEntity(httpEntity);
            // 执行请求
            response = httpclient.execute(httpPost);

            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                HttpEntity entity = response.getEntity();
                String result = EntityUtils.toString(entity, "UTF-8");
                EntityUtils.consume(entity);
                httpclient.close();
                return result;
            }
            httpclient.close();
        }catch (IOException e){
            e.printStackTrace();
            return null;
        }

        return  null;
    }
}