httpclient工具类

import java.io.IOException;
import java.net.URI;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
 
/**
 * @ClassName: HttpClientUtil
 * @Description: httpClient工具类
 * @author staystand
 */
 
public class HttpClientUtil {
	private static final Logger logger = LoggerFactory.getLogger(HttpClientUtil.class);
 
	/**
	 * @Title: doGet
	 * @Description: get方式
	 * @param url请求路径
	 * @param params参数
	 * @author staystand
	 */
	public static String doGet(String url, Map<String, String> params) {
 
		// 返回结果
		String result = "";
		// 创建HttpClient对象
		HttpClient httpClient = HttpClientBuilder.create().build();
		HttpGet httpGet = null;
		try {
			// 拼接参数,可以用URIBuilder,也可以直接拼接在？传值，拼在url后面，如下--httpGet = new
			// HttpGet(uri+"?id=123");
			URIBuilder uriBuilder = new URIBuilder(url);
			if (null != params && !params.isEmpty()) {
				for (Map.Entry<String, String> entry : params.entrySet()) {
					uriBuilder.addParameter(entry.getKey(), entry.getValue());
					// 或者用
					// 顺便说一下不同(setParameter会覆盖同名参数的值，addParameter则不会)
					// uriBuilder.setParameter(entry.getKey(), entry.getValue());
				}
			}
			URI uri = uriBuilder.build();
			// 创建get请求
			httpGet = new HttpGet(uri);
			logger.info("访问路径：" + uri);
			HttpResponse response = httpClient.execute(httpGet);
			if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {// 返回200，请求成功
				// 结果返回
				result = EntityUtils.toString(response.getEntity());
				logger.info("请求成功！，返回数据：" + result);
			} else {
				logger.info("请求失败！");
			}
		} catch (Exception e) {
			logger.info("请求失败!");
			logger.error(ExceptionUtils.getStackTrace(e));
		} finally {
			// 释放连接
			if (null != httpGet) {
				httpGet.releaseConnection();
			}
		}
		return result;
	}
 
	/**
	 * @Title: doPost
	 * @Description: post请求
	 * @param url
	 * @param params
	 * @return
	 * @author staystand
	 */
	public static String doPost(String url, Map<String, String> params) {
		String result = "";
		// 创建httpclient对象
		HttpClient httpClient = HttpClientBuilder.create().build();
		HttpPost httpPost = new HttpPost(url);
		try { // 参数键值对
			if (null != params && !params.isEmpty()) {
				List<NameValuePair> pairs = new ArrayList<NameValuePair>();
				NameValuePair pair = null;
				for (String key : params.keySet()) {
					pair = new BasicNameValuePair(key, params.get(key));
					pairs.add(pair);
				}
				// 模拟表单
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(pairs);
				httpPost.setEntity(entity);
			}
			HttpResponse response = httpClient.execute(httpPost);
			if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				result = EntityUtils.toString(response.getEntity(), "utf-8");
				logger.info("返回数据：>>>" + result);
			} else {
				logger.info("请求失败！，url:" + url);
			}
		} catch (Exception e) {
			logger.error("请求失败");
			logger.error(ExceptionUtils.getStackTrace(e));
			e.printStackTrace();
		} finally {
			if (null != httpPost) {
				// 释放连接
				httpPost.releaseConnection();
			}
		}
		return result;
	}
 
	/**
	 * @Title: sendJsonStr
	 * @Description: post发送json字符串
	 * @param url
	 * @param params
	 * @return 返回数据
	 * @author staystand
	 */
	public static String sendJsonStr(String url, String params) {
		String result = "";
 
		HttpClient httpClient = HttpClientBuilder.create().build();
		HttpPost httpPost = new HttpPost(url);
		try {
			httpPost.addHeader("Content-type", "application/json; charset=utf-8");
			httpPost.setHeader("Accept", "application/json");
			if (StringUtils.isNotBlank(params)) {
				httpPost.setEntity(new StringEntity(params, Charset.forName("UTF-8")));
			}
			HttpResponse response = httpClient.execute(httpPost);
			if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
				result = EntityUtils.toString(response.getEntity());
				logger.info("返回数据：" + result);
			} else {
				logger.info("请求失败");
			}
		} catch (IOException e) {
			logger.error("请求异常");
			logger.error(ExceptionUtils.getStackTrace(e));
		}
		return result;
	}

}