How to Make Java HTTP POST Requests

The method of calling an interface using HttpPost in Java is:

1. httpClient is created with the ability to close it using HttpClientBuilder.
2. The HTTP POST method is used by creating a new instance of HttpPost with the specified URL.
3. Create a list called params to store key-value pairs, add a pair with the key “param1” and value “value1”, add another pair with the key “param2” and value “value2”, then set the Entity of httpPost with the params in URL-encoded form.
4. The HttpClient sends a request using the HttpPost method and receives a response that can be closed using the CloseableHttpResponse object.
5. Attempt to obtain the entity of the response and convert it to a String. Process the response data. Finally, close the response.
6. Close the httpClient.

Please note that the above code is just an example, and it needs to be modified according to your specific situation when actually used. Additionally, the above method is a synchronous call, if you need asynchronous call, you can use Apache HttpAsyncClient or Java’s CompletableFuture.