Http请求调用第三方接口

package org.springblade.common.utils;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.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.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.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.FileEntity;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
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 org.springframework.web.context.request.WebRequest;

public class HttpClientUtil {

private HttpClientUtil() {
}

public static String doGet(String url, Map<String, String> param) {

	// 创建Httpclient对象
	CloseableHttpClient httpclient = HttpClients.createDefault();

	String resultString = "";
	CloseableHttpResponse response = null;
	try {
		// 创建uri
		URIBuilder builder = new URIBuilder(url);
		if (param != null) {
			for (String key : param.keySet()) {
				builder.addParameter(key, param.get(key));
			}
		}
		URI uri = builder.build();

		// 创建http GET请求
		HttpGet httpGet = new HttpGet(uri);

		// 执行请求
		response = httpclient.execute(httpGet);
		// 判断返回状态是否为200
		if (response.getStatusLine().getStatusCode() == 200) {
			resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
		}
	} catch (Exception e) {
		e.printStackTrace();
	} finally {
		try {
			if (response != null) {
				response.close();
			}
			httpclient.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	return resultString;
}

public static String doGet(String url) {
	return doGet(url, null);
}

/**
 * post formdata
 * @param url
 * @param param
 * @return
 */
public static String doPost(String url, Map<String, Object> param) {
	// 创建Httpclient对象
	CloseableHttpClient httpClient = HttpClients.createDefault();
	CloseableHttpResponse response = null;
	String resultString = "";
	try {
		HttpPost httpPost=null;
		// 创建参数列表
		if (param != null) {
			List<NameValuePair> paramList = new ArrayList<>();
			StringBuilder paramstr=new StringBuilder("");
			for (String key:param.keySet()){
				paramstr.append(key + "=" + URLEncoder.encode((String) param.get(key), "UTF-8") + "&");
			}
		/*	for (String key : param.keySet()) {
				paramList.add(new BasicNameValuePair(key, (String) param.get(key)));
			}*/
			// 创建Http Post请求
			 httpPost = new HttpPost(url+"?"+paramstr);

			// 模拟表单
			UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
			httpPost.setEntity(entity);
		}

		// 执行http请求
		response = httpClient.execute(httpPost);
		resultString = EntityUtils.toString(response.getEntity(), "utf-8");
	} catch (Exception e) {
		e.printStackTrace();
	} finally {
		try {
			if (response != null) {
				response.close();
			}
			httpClient.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	return resultString;
}

public static String doPost(String url) {
	return doPost(url, null);
}

/**
 * post 请求发送json
 * @param url
 * @param param
 * @param token_header
 * @return
 * @throws Exception
 */
public static String doPostJson(String url, Map<String, Object> param,String token_header) throws Exception {
	// 创建Httpclient对象
	CloseableHttpClient httpClient = HttpClients.createDefault();
	CloseableHttpResponse response = null;
	String resultString = "";
	try {
		// 创建Http Post请求
		HttpPost httpPost = new HttpPost(url);
		// 创建请求内容
		httpPost.setHeader("HTTP Method","POST");
		httpPost.setHeader("Connection","Keep-Alive");
		httpPost.setHeader("Content-Type","application/json;charset=utf-8");
		if(token_header != null) {
			httpPost.setHeader("x-authentication-token", token_header);
		}
		StringEntity entity = new StringEntity(JSON.toJSONString(param));
		entity.setContentType("application/json;charset=utf-8");
		httpPost.setEntity(entity);
		// 执行http请求
		response = httpClient.execute(httpPost);
		if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
			resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
		}
	} catch (Exception e) {
		throw e;
	} finally {
		try {
			if(response!=null){
				response.close();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	return resultString;
}

/**
 * httpClient 发送文件
 * @param param 其他参数
 * @param is 文件流
 * @param fileName 文件名
 * @return
 * @throws Exception
 */
public static String doUpload(String uploadURL,Map<String, Object> param, InputStream is,String fileName) throws Exception {
	String result ="";
	try {
		//创建HttpClient
		HttpPost httpPost  = new HttpPost(uploadURL);
		httpPost.setHeader("ContentType","text/xml");
		HttpPost post = new HttpPost(uploadURL);
		HttpEntity entity = new FileEntity(new File(fileName));
		post.setEntity(entity);
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = httpClient.execute(post);
		System.out.println(response.getStatusLine().getStatusCode());
		//执行提交
		HttpEntity responseEntity = response.getEntity();
		if(responseEntity != null){
			//将响应的内容转换成字符串
		  result = EntityUtils.toString(responseEntity, Charset.forName("UTF-8"));
		}

		response.close();
		httpClient.close();
	}catch (Exception ex){
		ex.printStackTrace();
	}finally {
		try {
			if(is!=null){
				is.close();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	return result;
}

}