基于apache httpclient的常用接口调用方法

现在的接口开发，大部分是基于http的请求和处理，现在整理了一份常用的调用方式工具类

package com.xh.oms.common.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLDecoder;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import net.sf.json.JSONObject;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpClientUtil {

	 /**
	  * 发送post请求，json格式数据
	  * @param url
	  * @param params
	  * @return
	  */
	 public static JSONObject postJsonData(String url,Map<String,String> params){
		 CloseableHttpClient httpclient = HttpClientUtil.createDefault();
		 HttpPost httpPost = new HttpPost(url);
		 httpPost.addHeader("Authorization", "your token"); //认证token
		 httpPost.addHeader("Content-type","application/json; charset=utf-8");
		 httpPost.addHeader("User-Agent", "imgfornote");
		 httpPost.setHeader("Accept", "application/json");

		  //拼接参数
		 JSONObject jsonParams = new JSONObject();
		 for (Map.Entry<String, String> entry : params.entrySet()) {
	         String key = entry.getKey().toString();
	         String value = entry.getValue().toString();
	         jsonParams.put(key, value);
		 }

		 //配置请求超时时间
		 RequestConfig requestConfig = RequestConfig.custom()
			        .setConnectTimeout(1*60*1000)                //设置连接超时时间，单位毫秒
			       // .setConnectionRequestTimeout(1000)         //设置从connect Manager获取Connection 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
			        .setSocketTimeout(3*60*1000).build();        //请求获取数据的超时时间，单位毫秒。 如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。
		 httpPost.setConfig(requestConfig); 

		 CloseableHttpResponse response=null;
		 try {
			httpPost.setEntity(new StringEntity(jsonParams.toString(), Charset.forName("UTF-8")));
			response = httpclient.execute(httpPost);
		 } catch (UnsupportedEncodingException e1) {
			 e1.printStackTrace();
		 } catch (ClientProtocolException e) {
			 e.printStackTrace();
		 } catch (IOException e) {
			 e.printStackTrace();
		 }

		 /**请求发送成功，并得到响应**/
		 JSONObject jsonObject=null;
		 if(response != null){
			 if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
				    HttpEntity httpEntity = response.getEntity();
				    String result=null;
					try {
						result = EntityUtils.toString(httpEntity);
					} catch (ParseException e) {
						e.printStackTrace();
					} catch (IOException e) {
						e.printStackTrace();
					}
					// 返回json格式：
				    jsonObject = JSONObject.fromObject(result);
			}
		 }

		 return jsonObject;
	 }

	 /**
	  * 发送post请求
	  * @param url
	  * @param params
	  * @return
	  */
	 public static JSONObject postData(String url,Map<String,String> params){
		 CloseableHttpClient httpclient = HttpClientUtil.createDefault();
		 HttpPost httpPost = new HttpPost(url);

		  //拼接参数
		 List<NameValuePair> list = new ArrayList<NameValuePair>();
		 for (Map.Entry<String, String> entry : params.entrySet()) {
		         String key = entry.getKey().toString();
		         String value = entry.getValue().toString();
		         NameValuePair pair = new BasicNameValuePair(key, value);
		         list.add(pair);
		 }

		 CloseableHttpResponse response=null;
		 try {
			httpPost.setEntity(new UrlEncodedFormEntity(list,"UTF-8"));
			response = httpclient.execute(httpPost);
		 } catch (UnsupportedEncodingException e1) {
			 e1.printStackTrace();
		 } catch (ClientProtocolException e) {
			 e.printStackTrace();
		 } catch (IOException e) {
			 e.printStackTrace();
		 }

		 /**请求发送成功，并得到响应**/
		 JSONObject jsonObject=null;
		 if(response.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
		    HttpEntity httpEntity = response.getEntity();
		    String result=null;
			try {
				result = EntityUtils.toString(httpEntity);
			} catch (ParseException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
			// 返回json格式：
		    jsonObject = JSONObject.fromObject(result);
		  }
		  return jsonObject;
	  }

	  /**
	     * 向指定URL发送GET方法的请求
	     *
	     * @param url
	     *            发送请求的URL
	     * @param param
	     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	     * @return URL 所代表远程资源的响应结果
	     */
	    public static String sendGet(String url, String param) {
	        String result = "";
	        BufferedReader in = null;
	        try {
	            String urlNameString = url + "?" + param;
	            URL realUrl = new URL(urlNameString);
	            // 打开和URL之间的连接
	            URLConnection connection = realUrl.openConnection();
	            // 设置通用的请求属性
	            connection.setRequestProperty("accept", "*/*");
	            connection.setRequestProperty("connection", "Keep-Alive");
	            connection.setRequestProperty("user-agent",
	                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
	            // 建立实际的连接
	            connection.connect();
	            // 获取所有响应头字段
	            Map<String, List<String>> map = connection.getHeaderFields();
	            // 遍历所有的响应头字段
	            for (String key : map.keySet()) {
	                System.out.println(key + "--->" + map.get(key));
	            }
	            // 定义 BufferedReader输入流来读取URL的响应
	            in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
	            String line;
	            while ((line = in.readLine()) != null) {
	                result += line;
	            }
	        } catch (Exception e) {
	            System.out.println("发送GET请求出现异常！" + e);
	            e.printStackTrace();
	        }
	        // 使用finally块来关闭输入流
	        finally {
	            try {
	                if (in != null) {
	                    in.close();
	                }
	            } catch (Exception e2) {
	                e2.printStackTrace();
	            }
	        }
	        return result;
	    }

	   /**
	    * get请求
	    * @param url
	    * @param param  请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	    * @return
	    */
	    public static JSONObject httpGet(String url, String param){
	        JSONObject jsonResult = null;   //get请求返回结果
	        try {

				 CloseableHttpClient httpclient = HttpClientUtil.createDefault();
	            //发送get请求
	            HttpGet request = new HttpGet(url);
	            URI realUrl = new URI(url + "?" + param);
	            request.setURI(realUrl);
	            HttpResponse response = httpclient.execute(request);

	            /**请求发送成功，并得到响应**/
	            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {

	                /**读取服务器返回过来的json字符串数据**/
	                String strResult = EntityUtils.toString(response.getEntity());

	                /**把json字符串转换成json对象**/
	                jsonResult = JSONObject.fromObject(strResult);
	                url = URLDecoder.decode(url, "UTF-8");
	            } else {
	            	 System.out.println("get请求提交失败:" + url);
	            }
	        } catch (IOException e) {
	        	e.printStackTrace();
	        }catch (Exception e) {
	        	e.printStackTrace();
	        }
	        return jsonResult;
	    }

	 /**
	   * Creates {@link CloseableHttpClient} instance with default
	   * configuration.
	   */
	   public static CloseableHttpClient createDefault() {
	       return HttpClientBuilder.create().build();
	   }

}