发送get 请求（方式一）

public static void doGet(String url){//1.获取httpclientCloseableHttpClient httpClient = HttpClients.createDefault();//接口返回结果CloseableHttpResponse response = null;try {//1.创建get请求HttpGet httpGet = new HttpGet(url);//2.设置请求和传输超时时间RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).build();httpGet.setConfig(requestConfig);/*此处可以添加一些请求头信息，例如：httpGet.addHeader("content-type","text/xml");*///3.提交参数response = httpClient.execute(httpGet);//4.得到响应信息int statusCode = response.getStatusLine().getStatusCode();//5.判断响应信息是否正确if(HttpStatus.SC_OK != statusCode){//终止并抛出异常httpGet.abort();throw new RuntimeException("HttpClient,error status code :" + statusCode);}} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}finally {//8.关闭所有资源连接if(null != response){try {response.close();} catch (IOException e) {e.printStackTrace();}}if(null != httpClient){try {httpClient.close();} catch (IOException e) {e.printStackTrace();}}}}

发送get 请求（方式二）

public static JSONObject sendGet(String url) throws IOException, URISyntaxException {JSONObject httpresponse = null;CloseableHttpClient client = HttpClients.createDefault();URIBuilder uri = new URIBuilder(url);HttpGet get = new HttpGet(uri.build());//get.addHeader("access_token", accessToken);CloseableHttpResponse response = client.execute(get);HttpEntity entity = response.getEntity();httpresponse = JSONObject.parseObject(EntityUtils.toString(entity, "utf-8"));response.close();client.close();return httpresponse;}

发送post请求（参数以表单方式提交）

public static JSONObject doPost(String url, Map<String,Object> content){CloseableHttpClient client = HttpClients.createDefault();HttpPost request =new HttpPost();JSONObject httpresponse = null;try{request.setURI(new URI(url));List<NameValuePair> list =new ArrayList<NameValuePair>();if(MapUtils.isNotEmpty(content)){for(Map.Entry<String,Object> entry:content.entrySet()){list.add(new BasicNameValuePair(entry.getKey(),(String)entry.getValue()));}}request.setEntity(new UrlEncodedFormEntity(list,"UTF-8"));request.setHeader("Content-Type","application/x-www-form-urlencoded");HttpResponse response =client.execute(request);// 返回json格式String result = EntityUtils.toString(response.getEntity());httpresponse = JSONObject.parseObject(result);}catch(Exception e){System.out.println(e.getMessage());}return httpresponse;}

发送Post请求（参数以JSON方式提交）

创建JSONObject参数实体：
JSONObject jsonParam = new JSONObject();
jsonParam.put(key,value);

public static JSONObject sendPost(JSONObject json,String url) {CloseableHttpClient client = HttpClients.createDefault();HttpPost post = new HttpPost(url);post.setHeader("Content-Type", "application/json");//post.addHeader("token", "A9NN4VcSys-Y4cUsIReQj-sCCzpMjwP_jLvT");JSONObject response = null;try {StringEntity s = new StringEntity(json.toString(), "utf-8");s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,"application/json"));post.setEntity(s);// 发送请求HttpResponse httpResponse = client.execute(post);if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {System.out.println("请求服务器成功，做相应处理");} else {System.out.println("请求服务端失败");}// 返回json格式String result = EntityUtils.toString(httpResponse.getEntity());response = JSONObject.parseObject(result);} catch (Exception e) {log.error("请求异常："+e.getMessage());throw new RuntimeException(e);}return response;}

以上方法用到的包，可自行来这里cv

import org.apache.http.entity.StringEntity;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.collections4.MapUtils;
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.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.client.utils.URIBuilder;
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 java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

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文章目录

发送get 请求（方式一）

发送get 请求（方式二）

发送post请求（参数以表单方式提交）

发送Post请求（参数以JSON方式提交）

以上方法用到的包，可自行来这里cv

使用HttpClients进行http请求相关推荐

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