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因為項目是采用maven搭建的，所以先把所需要的jar包定義進來，我是采用apache的httpComponents第三方技術！如下：

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????????????<!-- httpcomponents --><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpmime</artifactId></dependency><dependency><groupId>jaxen</groupId><artifactId>jaxen</artifactId></dependency>

其次就是寫調用客戶端（get方式）：

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????????@Testpublic void getOrderList() throws Exception {CloseableHttpClient httpClient = HttpClients.createDefault();HttpGet httpGet = new HttpGet("接口請求路徑……"); ?????httpGet.setHeader("Accept", "application/json");//如果要返回json結果，則需要設置此請求頭信息 CloseableHttpResponse httpResponse;try {httpResponse = httpClient.execute(httpGet);HttpEntity entity = httpResponse.getEntity();System.out.println(IOUtils.toString(entity.getContent()));} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}

其次就是寫調用客戶端（POST方式）：

導包都是一樣，就是發送請求的實體不同 如下：

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????????/* 獲取用戶留資信息接口：GetUserLeaveMsg */@Testpublic void GetUserLeaveMsg() throws Exception {CloseableHttpClient httpClient = HttpClients.createDefault();HttpPost httpPost = new HttpPost(URL + "?method=GetUserLeaveMsg"); ???????????????//POST傳遞方式?List<NameValuePair> nvps = new ArrayList<NameValuePair>();nvps.add(new BasicNameValuePair("date", "2014-12-01"));// yyyy-MM-ddnvps.add(new BasicNameValuePair("last_leave_msg_id", "0"));nvps.add(new BasicNameValuePair("CurPage", "1"));nvps.add(new BasicNameValuePair("PageSize", "50"));httpPost.setHeader("Accept", "application/json");httpPost.setEntity(new UrlEncodedFormEntity(nvps));CloseableHttpResponse httpResponse;try {httpResponse = httpClient.execute(httpPost);HttpEntity entity = httpResponse.getEntity();System.out.println(IOUtils.toString(entity.getContent()));} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}

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還會有一種就是傳Json的方式，我也一并羅列出來了供大家參考：

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????????/*** 新聞資訊類接口* * @throws Exception* @throws UnsupportedEncodingException*/@Testpublic void newsTest() throws Exception {CloseableHttpClient httpClient = HttpClients.createDefault();HttpPost httpPost = new HttpPost("接口請求url……");httpPost.addHeader("Authorization", "Basic " + sign);httpPost.setHeader("Accept", "application/json");httpPost.setHeader("Content-Type", "application/json");CloseableHttpResponse httpResponse;try { ???????????????????? //通過alibaba的fastJson的jar包來轉成json所需要的數據格式Map<String, Object> params = new HashMap<String, Object>();List<String> list = new ArrayList<String>();list.add("2348");list.add("163"); ????????????????????????params.put("DealerId", 66934);params.put("TypeId", 1);params.put("SeriesIds", list);String data = JSON.toJSONString(params);System.out.println("data-->" + data);/* 構造請求數據 */StringEntity myEntity = new StringEntity(data, ContentType.APPLICATION_JSON);/* 設置請求體 */httpPost.setEntity(myEntity);httpResponse = httpClient.execute(httpPost);HttpEntity entity = httpResponse.getEntity();System.out.println(httpPost.getURI().toString());System.out.println(IOUtils.toString(entity.getContent()));} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}

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就先寫到這里了，還有通過SOAP協議定義的接口就下回再寫，寫得比較倉促難免會出錯，如發現錯誤或者需要共同討論的地方

轉載于:https://my.oschina.net/rightemperor/blog/792655

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