<dependency> <groupId>org.apache.httpcomponents.client5</groupId> <artifactId>httpclient5</artifactId> <version>5.1.3</version> </dependency>
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package com.xcg.webapp.Common; import org.apache.commons.lang3.StringUtils; import org.apache.hc.client5.http.ClientProtocolException; import org.apache.hc.client5.http.classic.methods.HttpGet; import org.apache.hc.client5.http.classic.methods.HttpPost; import org.apache.hc.client5.http.config.RequestConfig; import org.apache.hc.client5.http.entity.UrlEncodedFormEntity; import org.apache.hc.client5.http.impl.classic.CloseableHttpClient; import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse; import org.apache.hc.client5.http.impl.classic.HttpClients; import org.apache.hc.core5.http.ContentType; import org.apache.hc.core5.http.HttpStatus; import org.apache.hc.core5.http.io.entity.EntityUtils; import org.apache.hc.core5.http.io.entity.StringEntity; import org.apache.hc.core5.http.message.BasicNameValuePair; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.Base64; import java.util.List; import java.util.Map; import java.util.concurrent.TimeUnit; import java.util.zip.GZIPOutputStream; /** * https://blog.csdn.net/HIGK_365/article/details/136985075 */ public final class HttpRestUtil { //設定字元編碼 private static final String CHARSET_UTF8 = "UTF-8"; /** * 傳送HTTP POST請求，引數為JSON格式。 * 此方法用於將JSON格式的字串作為請求體傳送到指定的URL，並接收響應。 * * @param url 請求的URL地址。不能為空。 * @param jsonData 請求的引數，應為符合JSON格式的字串。 * @param headParams 請求的頭部引數，以鍵值對形式提供。可以為空，但如果非空，則新增到請求頭中。 * @return 伺服器響應的字串形式內容。如果請求失敗，則可能返回null。 * throws BusinessException 當發生不支援的編碼、客戶端協議錯誤或IO異常時丟擲。 */ public static String post(String url, String jsonData, Map<String, String> headParams) throws Exception { String result = null; // 建立HTTP客戶端例項 CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpResponse response = null; try { // 建立HTTP POST請求物件 HttpPost httpPost = new HttpPost(url); // 配置請求和傳輸超時時間 RequestConfig requestConfig = RequestConfig.custom() .setConnectionRequestTimeout(100, TimeUnit.SECONDS) .build(); httpPost.setConfig(requestConfig); // 將JSON字串引數轉換為StringEntity，並設定請求實體 httpPost.setEntity(new StringEntity(jsonData, ContentType.create("application/json", CHARSET_UTF8))); // 如果存在頭部引數，則新增到請求頭中 if (headParams != null && !headParams.isEmpty()) { for (Map.Entry<String, String> entry : headParams.entrySet()) { httpPost.addHeader(entry.getKey(), entry.getValue()); } } // 執行請求並獲取響應 response = httpClient.execute(httpPost); // 檢查響應狀態碼 int statusCode = response.getCode(); if (HttpStatus.SC_OK != statusCode) { httpPost.abort(); throw new RuntimeException("HttpClient,error status code :" + statusCode); } // 從響應中獲取內容並轉換為字串 var entity = response.getEntity(); if (null != entity) { result = EntityUtils.toString(entity, CHARSET_UTF8); } EntityUtils.consume(entity); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { //釋放資源 release(response, httpClient); } return result; } /** * get請求 * https://blog.csdn.net/Barry_Li1949/article/details/134641891 */ public static String get(String urlWithParams) throws Exception { return get(urlWithParams, null, null); } public static String get(String url, Map<String, String> params, Map<String, String> headParams) throws Exception { String result = null; // 建立HTTP客戶端例項 CloseableHttpClient httpClient = HttpClients.createDefault(); CloseableHttpResponse response = null; String paramStr = null; try { // 構建請求引數列表 List<BasicNameValuePair> paramsList = new ArrayList<>(); if (params != null) { for (Map.Entry<String, String> entry : params.entrySet()) { paramsList.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } // 將引數列表轉換為字串形式，用於拼接到URL後 paramStr = EntityUtils.toString(new UrlEncodedFormEntity(paramsList)); } // 拼接引數到URL StringBuffer sb = new StringBuffer(); sb.append(url); if (!StringUtils.isBlank(paramStr)) { sb.append("?"); sb.append(paramStr); } // 建立HTTP GET請求物件 HttpGet httpGet = new HttpGet(sb.toString()); // 配置請求和傳輸超時時間 RequestConfig requestConfig = RequestConfig.custom() .setConnectionRequestTimeout(100, TimeUnit.SECONDS) .build(); httpGet.setConfig(requestConfig); // 如果存在頭部引數，則新增到請求頭中 if (headParams != null && !headParams.isEmpty()) { for (Map.Entry<String, String> entry : headParams.entrySet()) { httpGet.addHeader(entry.getKey(), entry.getValue()); } } // 執行請求並獲取響應 response = httpClient.execute(httpGet); // 檢查響應狀態碼 int statusCode = response.getCode(); if (HttpStatus.SC_OK != statusCode) { httpGet.abort(); throw new RuntimeException("HttpClient,error status code :" + statusCode); } // 從響應中獲取內容並轉換為字串 var entity = response.getEntity(); if (null != entity) { result = EntityUtils.toString(entity, CHARSET_UTF8); } EntityUtils.consume(entity); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } finally { //釋放資源 release(response, httpClient); } return result; } /** * 釋放資源，httpResponse為響應流，httpClient為請求客戶端 */ private static void release(CloseableHttpResponse httpResponse, CloseableHttpClient httpClient) throws IOException { if (httpResponse != null) { httpResponse.close(); } if (httpClient != null) { httpClient.close(); } } }