2019独角兽企业重金招聘Python工程师标准>>> 
因为项目是采用maven搭建的，所以先把所需要的jar包定义进来，我是采用apache的httpComponents第三方技术！如下：
org.apache.httpcomponents
httpcore
org.apache.httpcomponents
httpclient
org.apache.httpcomponents
httpmime
jaxen
jaxen
其次就是写调用客户端（get方式）：
@Test
public void getOrderList() throws Exception {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet("接口请求路径……"); httpGet.setHeader("Accept", "application/json");//如果要返回json结果，则需要设置此请求头信息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();
}
}其次就是写调用客户端（POST方式）：
导包都是一样，就是发送请求的实体不同 如下：
/* 获取用户留资信息接口：GetUserLeaveMsg */
@Test
public void GetUserLeaveMsg() throws Exception {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(URL + "?method=GetUserLeaveMsg");
//POST传递方式
List nvps = new ArrayList();
nvps.add(new BasicNameValuePair("date", "2014-12-01"));// yyyy-MM-dd
nvps.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();
}
}
还会有一种就是传Json的方式，我也一并罗列出来了供大家参考：
/**
* 新闻资讯类接口
*
* @throws Exception
* @throws UnsupportedEncodingException
*/
@Test
public void newsTest() throws Exception {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost("接口请求url……");
httpPost.addHeader("Authorization", "Basic " + sign);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-Type", "application/json");
CloseableHttpResponse httpResponse;
try { //通过alibaba的fastJson的jar包来转成json所需要的数据格式
Map params = new HashMap();
List list = new ArrayList();
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);
/* 构造请求数据 */
StringEntity myEntity = new StringEntity(data, ContentType.APPLICATION_JSON);
/* 设置请求体 */
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();
}
}
就先写到这里了，还有通过SOAP协议定义的接口就下回再写，写得比较仓促难免会出错，如发现错误或者需要共同讨论的地方