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How to download a file via http get and http post in java?


Asked by Jaylah Rowe on Dec 05, 2021 Java



Apart from uploading a file to a HTTP server endpoint, another common task for a Java HTTP client is to download a file from a HTTP server. Even though there are many Java external libraries to help us do so, using the facilities in the Java standard runtime installation is not difficult.
Thereof,
In such a situation, HTTP POST is a more appropriate HTTP method to use for downloading the file. As with HTTP GET, downloading of a file from the HTTP server via HTTP POST consists of the following steps: Construct the HTTP POST request to send to the HTTP server. Send the HTTP request and receive the HTTP Response from the HTTP server.
Similarly, 1 HTTP GET. The HTTP GET method requests a representation of the specified resource. ... 2 HTTP POST. The HTTP POST method sends data to the server. ... 3 Java HTTP POST Request with HttpURLConnection. ... 4 Using the Apache HttpClient - Add Dependency. ... 5 Java HTTP POST Request with Apache HTTPClient. ...
Moreover,
Downloading of a file from the web server via HTTP get in C# consists of three main steps: 1 Construct the HTTP get request to send to the web server. 2 Send the HTTP request and get the HTTP response from the web server. 3 Save the contents in the HTTP response to a local file.
Also,
You know, in Java, we can use the classes URL and HttpURLConnection in the package java.net to programmatically download a file from a given URL by following these steps: Create a URL object for a given URL. The URL can be either: A direct link which contains the real file name at the end, for example: