从JgraphT创建一个JSON对象

import org.jgrapht.Graph;
import org.jgrapht.graph.DefaultDirectedGraph;
import org.json.JSONArray;
import org.json.JSONObject;

public class JGraphTToJsonExample {
    public static void main(String[] args) {
        // 创建有向图对象
        Graph<String, Integer> graph = new DefaultDirectedGraph<>(Integer.class);

        // 添加顶点
        graph.addVertex("A");
        graph.addVertex("B");
        graph.addVertex("C");

        // 添加边
        graph.addEdge("A", "B", 1);
        graph.addEdge("B", "C", 2);
        graph.addEdge("C", "A", 3);

        // 将图转换为JSON对象
        JSONObject jsonGraph = new JSONObject();
        JSONArray jsonVertices = new JSONArray();
        JSONArray jsonEdges = new JSONArray();

        for (String vertex : graph.vertexSet()) {
            jsonVertices.put(vertex);
        }

        for (Integer edge : graph.edgeSet()) {
            String sourceVertex = graph.getEdgeSource(edge);
            String targetVertex = graph.getEdgeTarget(edge);

            JSONObject jsonEdge = new JSONObject();
            jsonEdge.put("source", sourceVertex);
            jsonEdge.put("target", targetVertex);

            jsonEdges.put(jsonEdge);
        }

        jsonGraph.put("vertices", jsonVertices);
        jsonGraph.put("edges", jsonEdges);

        // 打印JSON对象
        System.out.println(jsonGraph.toString());
    }
}