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HttpClient
最近写了些接口，使用到了HttpClient，这里留作复习
HttpClient有新旧之分org.apache.commons.httpclient.HttpClient和org.apache.http.client.HttpClient
org.apache.http.client.HttpClient 取代了org.apache.commons.httpclient.HttpClient
这里就不探讨org.apache.commons.httpclient.HttpClient的用法了。
首先是get方法
public static void get(){ /** * org.apache.commons.httpclient.HttpClient还是class * org.apache.http.client.HttpClient已经是interface了 */ CloseableHttpClient httpclient = HttpClients.createDefault(); try { // 创建httpget. HttpGet httpget = new HttpGet("http://localhost:8080/test/MyTestServlet?paramter=111"); System.out.println("executing request " + httpget.getURI()); // 执行get请求. //要是不加httpcore-4.4.4.jar这边编译不过去，有空看看 CloseableHttpResponse response = httpclient.execute(httpget); // 获取响应实体 HttpEntity entity = response.getEntity(); System.out.println("--------------------------------------"); // 打印响应状态 System.out.println(response.getStatusLine()); if (entity != null) { // 打印响应内容长度 System.out.println("Response content length: " + entity.getContentLength()); // 打印响应内容 System.out.println("Response content: " + EntityUtils.toString(entity)); } System.out.println("------------------------------------"); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally{ try { httpclient.close(); } catch (IOException e) { e.printStackTrace(); } } }
普通的post请求
public static void commonPost(){ // 创建默认的httpClient实例. CloseableHttpClient httpClient = HttpClients.createDefault(); // 创建httppost HttpPost httppost = new HttpPost("http://localhost:8080/test/MyTestServlet"); // 创建参数队列 List<NameValuePair> formparams = new ArrayList<NameValuePair>(); formparams.add(new BasicNameValuePair("paramter", "hou12312se")); UrlEncodedFormEntity uefEntity; try { uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8"); httppost.setEntity(uefEntity); System.out.println("executing request " + httppost.getURI()); CloseableHttpResponse response = httpClient.execute(httppost); HttpEntity entity = response.getEntity(); if (entity != null) { System.out.println("--------------------------------------"); System.out.println("Response content: " + EntityUtils.toString(entity, "UTF-8")); System.out.println("--------------------------------------"); } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { httpClient.close(); } catch (IOException e) { e.printStackTrace(); } } }
Content-Type为application/x-www-form-urlencoded的post请求
public static void specialPost(){ CloseableHttpClient httpClient = HttpClients.createDefault(); HttpPost httpPost = new HttpPost("http://localhost:8081/test/doPostTestServlet"); List<NameValuePair> list = new ArrayList<NameValuePair>(); list.add(new BasicNameValuePair("UserNumber", "13173001830")); list.add(new BasicNameValuePair("corp_id", "qd007")); httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded"); try { UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(list); httpPost.setEntity(urlEncodedFormEntity); CloseableHttpResponse response = httpClient.execute(httpPost); HttpEntity entity = response.getEntity(); System.out.println(EntityUtils.toString(entity, "utf-8")); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }
Content-Type为application/json的post请求
public static void specialPost1(){ CloseableHttpClient httpClient = HttpClients.createDefault(); HttpPost httpPost = new HttpPost("http://localhost:8081/test/doPostTestServlet"); JSONObject jsonObject = new JSONObject(); jsonObject.put("name", "vincent"); jsonObject.put("age", "24");//换成int型的有区别吗？ jsonObject.put("height", "182"); System.out.println("jsonObject大小:" + jsonObject.size()); httpPost.setHeader("Content-Type", "application/json"); StringEntity entity = new StringEntity(jsonObject.toString(), "utf-8"); httpPost.setEntity(entity); try { CloseableHttpResponse response = httpClient.execute(httpPost); HttpEntity httpEntity = response.getEntity(); System.out.println(EntityUtils.toString(httpEntity, "utf-8")); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }
这里有2种方式
HttpClient
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