parse.java

 private static final ObjectMapper mapper = new ObjectMapper();

    public static void main(String[] args) throws Exception {

        JsonNode rootArray = mapper.readTree(new File("test.json"));
        for (JsonNode root : rootArray) {
            long id = root.path("id").asLong();

            System.out.println(id);
            JsonNode projectNode = root.path("projects");

            if (projectNode.isArray()) {
                for (JsonNode node : projectNode) {
                    String name = node.path("name").asText();

                    JsonNode issueNode = node.path("issues");

                    if (issueNode.isArray()) {
                        for (JsonNode nodeIssue : issueNode) {
                            String title = nodeIssue.path("title").asText();
                            System.out.println(title);
                        }
                    }
                }
            }
        }

    }