Jackson JsonNode.forEach() with Java 8 Consumer

Jackson has provided JsonNode.forEach() method which will accept Java 8 consumer definition to iterate each node. The consumer accepts only super classes of JsonNode. It has been defined as below.

forEach(Consumer<? super JsonNode>  arg)

We can define consumer only with super class of JsonNode. Now find the simple example to parse JSON and iterating it using Java 8 consumer.

JsonFactory jsonFactory = new JsonFactory();
JsonParser jp = jsonFactory.createJsonParser(new File("D:/cp/info.json"));
jp.setCodec(new ObjectMapper());
JsonNode jsonNode = jp.readValueAsTree();
Consumer<JsonNode> data = (JsonNode node) -> System.out.println(node.asText());
jsonNode.forEach(data);

Results

  • JacksonJsonNodeForEachTest