Java之使用HttpClient發送GET請求

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 1 package LoadRunner; 2  3 import org.apache.http.HttpEntity; 4 import org.apache.http.HttpResponse; 5 import org.apache.http.client.methods.HttpGet; 6 import org.apache.http.impl.client.CloseableHttpClient; 7 import org.apache.http.impl.client.HttpClients; 8  9 import java.io.BufferedReader;10 11 import java.io.InputStreamReader;12 13 /*14 * 使用Apache的HttpClient發送GET和POST請求的步驟如下:15 *   1. 使用協助類HttpClients建立CloseableHttpClient對象.16 *   2. 基於要發送的HTTP請求類型建立HttpGet或者HttpPost執行個體.17 *   3. 使用addHeader方法添加要求標頭部,諸如User-Agent, Accept-Encoding等參數.18 *   4. 對於POST請求,建立NameValuePair列表,並添加所有的表單參數.然後把它填充進HttpPost實體.19 *   5. 通過執行此HttpGet或者HttpPost請求擷取CloseableHttpResponse執行個體20 *   6. 從此CloseableHttpResponse執行個體中擷取狀態代碼,錯誤資訊,以及響應頁面等等.21 *   7. 最後關閉HttpClient資源.22 * */23 24 /**25  * 使用HttpClient調用介面26  * 為效能測試寫介面指令碼27  */28 public class GetChannelLine {29     public static void main(String args[]) throws Exception {30         String channelId = "sdd";31         String clientId = "123";32         // 目標地址33         String url = "http://XXX.XXX.com.cn/arowana/channel/getChannelLine?channelId=" + channelId + "&clientId=" + clientId;34         HttpGet httpGet = new HttpGet(url);35 36         // 設定類型 "application/x-www-form-urlencoded" "application/json"37         httpGet.setHeader("Content-Type", "application/x-www-form-urlencoded");38         System.out.println("調用URL: " + httpGet.getURI());39 40 //        httpClient執行個體化41         CloseableHttpClient httpClient = HttpClients.createDefault();42         // 執行請求並擷取返回43         HttpResponse response = httpClient.execute(httpGet);44 //        System.out.println("Response toString()" + response.toString());45         HttpEntity entity = response.getEntity();46         System.out.println("返回狀態代碼：" + response.getStatusLine());47 48         //得到返回資料的長度；沒有該參數返回-149 //        if (entity != null) {50 //            System.out.println("返回訊息內容長度: " + entity.getContentLength());51 //        }52 53         // 顯示結果54         BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent(), "UTF-8"));55         String line = null;56         StringBuffer responseSB = new StringBuffer();57         while ((line = reader.readLine()) != null) {58             responseSB.append(line);59         }60         System.out.println("返回訊息：" + responseSB);61         reader.close();62 63         httpClient.close();64     }65 }

依賴包：

1         <dependency>2             <groupId>org.apache.httpcomponents</groupId>3             <artifactId>httpclient</artifactId>4             <version>4.5.5</version>5         </dependency>

 

Java之使用HttpClient發送GET請求