Example tutorial on passing parameters using NameValuePair method

Today, during joint debugging, an external interface was transmitted using POST mode. I encapsulated the parameters as Jason strings and passed them in according to the document, but the other party kept accepting the parameters as empty. After struggling for a long time, I still couldn't find the problem. I'm very distressed. There are no errors when checking the code, but why does the other party accept empty parameters? Then I contacted the other party's technical staff for joint debugging to see what was going on. After struggling for a long time, I finally found that the other party was using the NameValuePair method to pass parameters. Although this method is outdated, it is recorded here in case a similar method of passing parameters appears in the future.

 1 /** 
 2 /** 
 3  * 定义了一个list，该list的数据类型是NameValuePair（简单名称值对节点类型）， 
 4  * 这个代码用于Java像url发送Post请求。在发送post请求时用该list来存放参数。 
 5  */ 
 6  
 7 List<NameValuePair> urlParameters = new ArrayList<>(); 
 8 urlParameters.add(new BasicNameValuePair("token", token)); 
 9 urlParameters.add(new BasicNameValuePair("city", city));
 10 urlParameters.add(new BasicNameValuePair("timestamp", timestamp));
 11 urlParameters.add(new BasicNameValuePair("sign", sign));
 12 ...
 13 
 14 HttpPost post = new HttpPost("http://****:8047/v4.0/quoted");//建立HttpPost对象
 15 post.setEntity(new UrlEncodedFormEntity(urlParameters, HTTP.UTF_8));//设置编码
 16 HttpResponse response=new DefaultHttpClient().execute(post);//发送Post,并返回一个HttpResponse对象
 17 String content = EntityUtils.toString(response.getEntity(), "UTF-8");

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