【Http】httputils实现get请求

import com.fasterxml.jackson.databind.ObjectMapper;import org.apache.commons.io.IOUtils;import org.apache.commons.lang3.StringUtils;import org.apache.http.HttpEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import java.io.IOException;import java.io.InputStream;/** * Created on 2015/7/28. * * @author  * @version 1.0 */public abstract class HttpUtils {    private static CloseableHttpClient httpClient = HttpClients.createDefault();    private static ObjectMapper mapper = new ObjectMapper();    public static String get(String url) {        HttpGet httpGet = new HttpGet(url);        try (CloseableHttpResponse httpResponse = httpClient.execute(httpGet)) {            HttpEntity entity = httpResponse.getEntity();            InputStream inputStream = entity.getContent();            String result = IOUtils.toString(inputStream, "UTF-8");            inputStream.close();            return result;        } catch (IOException e) {            throw new RuntimeException(e);        }    }    public static <T> T get(String url, Class<T> clazz) {        String result = get(url);        if (StringUtils.isNotBlank(result)) {            try {                return mapper.readValue(result, clazz);            } catch (Exception e) {                throw new RuntimeException(e);            }        }        return null;    }}