获取json叶子节点的jsonPath

maven的pom文件

    
        
        
            com.alibaba
            fastjson
            1.2.31
        
    

实现代码

      public static  List getListJson(JSONObject jsonObject) {
        // 获取到所有jsonpath后，获取所有的key
        List jsonPaths = JSONPath.paths(jsonObject).keySet()
                .stream()
                .collect(Collectors.toList());
        //去掉根节点key
        List parentNode = new ArrayList<>();
        //根节点key
        parentNode.add("/");
        //循环获取父节点key，只保留叶子节点
        for (int i = 0; i < jsonPaths.size(); i++) {
            if (jsonPaths.get(i).lastIndexOf("/") > 0) {
                parentNode.add(jsonPaths.get(i).substring(0, jsonPaths.get(i).lastIndexOf("/")));
            }
        }

        //remove父节点key
        for (String parentNodeJsonPath : parentNode) {
            jsonPaths.remove(parentNodeJsonPath);
        }

        List jsonPathList = new ArrayList<>();
        Iterator jsonPath = jsonPaths.iterator();
        //将/替换为点.
        while (jsonPath.hasNext()) {
            jsonPathList.add(jsonPath.next().replaceFirst("/", "").replaceAll("/", "."));
        }
        //排序
        Collections.sort(jsonPathList);
        return jsonPathList;
    }

    public static void main(String[] args) {
        JSONObject jsonObject = new JSONObject();
        JSONPath.set(jsonObject,"data.person","个人");
        JSONPath.set(jsonObject,"data.student.age","20");
        JSONPath.set(jsonObject,"data.student.name","张三");

        List listJsonPath = getListJson(jsonObject);
        for(String jsonPath:listJsonPath){
            System.out.println(jsonPath);
        }
    }

执行结果

data.person
data.student.age
data.student.name

扩展

1.可通过jsonpath去获取json的value
JSONPath.eval(jsonObject,“data.student.name”)