使用方法

HttpUtils.doGetStr(url) or HttpUtils.doPostStr(url,params);

以上url即为接口访问地址，调用此方法访问接口，接口返回类型为json。在post请求中，第二个参数是请求参数的数据，即“a=xxx&b=XXX”,用法实例

    String param = "phone=" + username + "&sn=" + MD5Utils.md5(username + "M8E/Ry_F!*]k!eMt7(47aUU_Wd:dvFb5_AvmpuuC^b" + "101.200.174.30");
    StringEntity stringEntity = new StringEntity(param, "UTF-8");
    stringEntity.setContentType("application/x-www-form-urlencoded");
    JSONObject jsonObject = null;
    jsonObject = HttpUtil.doPostStr(HttpUtil.GET_TOKEN, stringEntity);

传递参数的两种方式

• 1、StringEntity

    HttpPost httpPost = new HttpPost(url);  
    //param参数，可以为param="key1=value1&key2=value2"的一串字符串,或者是jsonObject 
     String param1="key1=value1&key2=value2"
    JSONObject param2= new JSONObject();  
    param2.put("key1", "value1");  
    param2.put("key2t"," value2");  
    StringEntity stringEntity = new StringEntity(param1);  
    StringEntity stringEntity = new StringEntity(param2.toString());  
    stringEntity.setContentType("application/x-www-form-urlencoded");
    httpPost.setEntity(stringEntity);  
    HttpClient client = new DefaultHttpClient();   
    HttpResponse httpResponse = client.execute(httpPost);  
    String result = EntityUtils.toString(httpResponse.getEntity(), HTTP.UTF_8);  

• 2、UrlEncodedFormEntity

    List<NameValuePair> pairs = new ArrayList<NameValuePair>(); 
    NameValuePair pair1 = new BasicNameValuePair("supervisor", supervisorEt.getEditableText().toString());  
    NameValuePair pair2 = new BasicNameValuePair("content", superviseContentEt.getEditableText().toString());  
    NameValuePair pair3 = new BasicNameValuePair("userId", String.valueOf(signedUser.getId()));  
    pairs.add(pair1);  
    pairs.add(pair2);  
    pairs.add(pair3);  
    httpPost.setEntity(new UrlEncodedFormEntity(pairs, HTTP.UTF_8)) 

//since 4.3 不再使用 DefaultHttpClient

 CloseableHttpClient closeableHttpClient = HttpClientBuilder.create().build();     
 ...

比较全的请求示例代码：https://www.cnblogs.com/liaojie970/p/8490505.html