集合转换 List＜Map＜String,Object＞＞转List＜T＞

集合转为数组

List<Long>  chargeIds =new ArrayList<Long>();
Long [] ids=(Long[])chargeIds.toArray();

 

List＜Map＜String,Object＞＞转List＜T＞ list map对象转list对象

List<Map<String, Object>> listMap = new ArrayList<>();
JSONArray jsonArray = new JSONArray();
jsonArray.addAll(listMap);
List<User> list = jsonArray.toJavaList(User.class);
for (User user : list) {
    System.out.println(user.getName()+"======"+user.getAge());
}