引入的包為：
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<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient --><dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.8</version></dependency> |
實現(xiàn)的工具類為：
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import com.alibaba.fastjson.JSON;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.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.io.IOException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class HttpClientHelper { private HttpClientHelper() { } /** * 發(fā)起POST請求 * * @param url url * @param paramMap 參數(shù)的Map格式 */ public static void sendPost(String url, Map<String, String> paramMap) { logger.info("開始發(fā)起POST請求，請求地址為{}，參數(shù)為{}", url, JSON.toJSON(paramMap)); CloseableHttpResponse response = null; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { String encoding = "utf-8"; //創(chuàng)建post請求對象 HttpPost httpPost = new HttpPost(url); //裝填請求參數(shù) List<NameValuePair> list = new ArrayList<>(); for (Map.Entry<String, String> entry : paramMap.entrySet()) { list.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } //設(shè)置參數(shù)到請求對象中 httpPost.setEntity(new UrlEncodedFormEntity(list, encoding)); httpPost.setHeader("Content-type", "application/x-www-form-urlencoded"); httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); response = httpClient.execute(httpPost); } catch (IOException e) { logger.error("POST請求發(fā)出失敗，請求的地址為{}，參數(shù)為{}，錯誤信息為{}", url, JSON.toJSON(paramMap), e.getMessage(), e); } finally { try { if (response != null) { response.close(); } } catch (IOException e) { logger.error("POST請求response關(guān)閉異常，錯誤信息為{}", e.getMessage(), e); } } } /** * 發(fā)起GET請求 * * @param urlParam url請求，包含參數(shù) */ public static void sendGet(String urlParam) { logger.info("開始發(fā)起GET請求，請求地址為{}", urlParam); HttpGet httpGet = new HttpGet(urlParam); CloseableHttpResponse response = null; try (CloseableHttpClient httpClient = HttpClients.createDefault()) { response = httpClient.execute(httpGet); int status = response.getStatusLine().getStatusCode(); logger.error("GET請求發(fā)出成功，請求的地址為{}，返回狀態(tài)為{}", urlParam, status); } catch (IOException e) { logger.error("GET請求發(fā)出失敗，請求的地址為{}，錯誤信息為{}", urlParam, e.getMessage(), e); } finally { try { if (response != null) { response.close(); } } catch (IOException e) { logger.error("GET請求response關(guān)閉異常，錯誤信息為{}", e.getMessage(), e); } } } public static void main(String[] args) { String url = "https://jiashubing.cn/tencenttest"; //需要傳入的參數(shù) Map<String, String> map = new HashMap<>(); map.put("code", "js"); map.put("day", "0"); map.put("city", "北京"); map.put("dfc", "1"); map.put("charset", "utf-8"); sendPost(url, map); String urlParam = "https://jiashubing.cn/talk/document?fileid=1234ji賈樹丙"; sendGet(urlParam); }} |
如果POST請求想要發(fā)送Json 格式的數(shù)據(jù)，只需要修改成這樣：
String json = JSON.toJSONString(paramMap);
StringEntity requestEntity = new StringEntity(json, "utf-8");
httpPost.setEntity(requestEntity);
以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：https://www.cnblogs.com/acm-bingzi/p/httpcomponents.html
