HTTP POST and HTTP GET using RestTemplate

http-get-http-post.java

// For GET request

if (marks != null && roll != null && !roll.isEmpty()) {
	RestTemplate restTemplate = new RestTemplate();

	String url = PropsUtil.get("some.server") + "/mark/v1/" + roll;
	ResponseEntity<String> result = restTemplate.getForEntity(url, String.class);
	String data = result.getBody();
	if (data != null) {
		JSONObject json = JSONFactoryUtil.createJSONObject(data);
		if( json.has("passed")){
			renderRequest.setAttribute("passed", json.getBoolean("passed"));
		}else{
			renderRequest.setAttribute("passed", false);
		}
	}
}

// For POST request

if (marks != null && roll != null && !roll.isEmpty()) {
	RestTemplate restTemplate = new RestTemplate();

	String url = PropsUtil.get("some.server") + "/mark/v1";
	JSONObject request = JSONFactoryUtil.createJSONObject();
	request.put("roll", roll);
	HttpHeaders headers = new HttpHeaders();
	headers.setContentType(MediaType.APPLICATION_JSON);
	HttpEntity<String> entity = new HttpEntity(request.toString(), headers);
	ResponseEntity<String> result = restTemplate.postForEntity(url, entity, String.class);
	String data = result.getBody();
	if (data != null) {
		JSONObject json = JSONFactoryUtil.createJSONObject(data);
		if( json.has("passed")){
			renderRequest.setAttribute("passed", json.getBoolean("passed"));
		}else{
			renderRequest.setAttribute("passed", false);
		}
	}
}