HttpClinetUtil

<dependency>
　　<groupId>org.apache.httpcomponents</groupId>
　　<artifactId>httpclient</artifactId>
　　<version>4.5.5</version>
</dependency>

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;
    }
}