JAVA to JSON 避免循环引用造成死循环

JAVA to JSON 避免循环引用造成死循环

JsonConfig config = new JsonConfig();
  config.setJsonPropertyFilter(new PropertyFilter() {
   public boolean apply(Object source, String name, Object value) {
    if (name.equals("form") || name.equals("formElm")   ) {
     return true;
    } else {
     return false;
    }
   }
  });
  
  JSONObject jsonObject = JSONObject.fromObject( form, config );