To request JSON from a URL using Java, you need to send an HTTP GET request to the server and provide the Accept: application/json request header with your request. The Accept header tells the server that our Java client is expecting JSON. The server informs the Java client that it has returned JSON with a Content-Type: application/json response header. In this Java request JSON example, we are making a GET request to the ReqBin echo URL. The Java code was automatically generated for the GET JSON example.
How to request data in JSON format using Java?
To get data in JSON format from the server, the Java client must explicitly tell the server that it expects JSON by sending the Accept: application/json request header. Without the Accept header, the server may automatically send data in a different format that it thinks is best for the API client (based on the UserAgent header), and it might not be JSON.
JSON Accept Header Example
Java JSON Request Example
An example of an HTTP GET request to fetch JSON data from a ReqBin echo URL. Click Generate Code to see the Java code for this JSON request example.
JSON Request Example
GET /echo/get/json HTTP/1.1
The server response to our Java client's request.
JSON Response Example
HTTP/1.1 200 OK
The server returned JSON in the body of the HTTP response message. The Content-Length: 19 header indicates the length of the JSON data in the response body, and the Content-Type: application/json response header indicates the type of data.
JSON MIME Type
The official MIME type for JSON is application/json: