Java-树结构到JSON对象

Question

I have a tree structure modeled on the following template: https://github.com/gt4dev/yet-another-tree-structure/blob/master/java/src/com/tree/TreeNode.java

I'd like to dump the entire tree into a JSON object. I have looked into using Jackson but I have a hard time finding adequate usage examples for this particular task.

EDIT: I should have been clearer that what I'm looking for is a JSON file that has the same structure as the original tree, as such what I'm looking for is something like:

{
    "root": data {
        "child 1": "data child 1",
        "child 2": "data child 2" { 
              "child of child 2": "data..."

and so on...

Answer 1

JSON is a string format - a linear one.

A tree is not a linear data type.

With these, you need to decide on how a tree looks like as a string.

You can try:

• Make a tuple string: "A(B(E,F),C(G,H))"
• Traversing a tree and making an array out of it: ["A", "B", C"]
• Creating a table/map of parent-children pairings: [{"node":"A","children":["B","C"]},{"node":"B","children":["E","F"]}]
• ...or maybe something else, be creative!