Dealing With JSON Files

The BEST way of reading nodes of a JSON file

Having trouble reading JSON file nodes or validating one of the values? You are right here. It becomes hectic sometimes even though it seems a very easy thing to solve and even there are tons of GSON, JACKSON, Jayway dependencies are sitting there.

I came across this works for me as the BEST and of course for now :) For example, once you are given like the below file and finding the batters.batter[0].id node from the below JSON file:

{
	"id": "0001",
	"type": "donut",
	"name": "Cake",
	"ppu": 0.55,
	"batters":
		{
			"batter":
				[
					{ "id": "1001", "type": "Regular" },
					{ "id": "1002", "type": "Chocolate" },
					{ "id": "1003", "type": "Blueberry" },
					{ "id": "1004", "type": "Devil's Food" }
				]
		},
	"topping":
		[
			{ "id": "5001", "type": "None" },
			{ "id": "5002", "type": "Glazed" },
			{ "id": "5005", "type": "Sugar" },
			{ "id": "5007", "type": "Powdered Sugar" },
			{ "id": "5006", "type": "Chocolate with Sprinkles" },
			{ "id": "5003", "type": "Chocolate" },
			{ "id": "5004", "type": "Maple" }
		]
}

The best and easiest way for me is; Taking the path of the file and, copy the JSON content into https://jsonpathfinder.com/ for a better and visual representation.

String data = new String(Files.readAllBytes(Paths.get("src/main/java/org/api/json/mixpayload.json")));
Object nodeVal = JsonPath.read(data, "batters.batter[0].id");
System.out.println(nodeVal);

I dealt with the below ways also: More to come…