ERROR LazyInitializationException:19 - failed to lazily initialize a collection of role: com.goodfan.entity.BeanA.beanB, no session or session was closed

1. 问题， 当使用JSONArray.fromObject(List<BeanA>)时， beanA中含有BeanB的属性beanB时，会报这个错

2. 解决办法： 使用jsonconfig排除bean类型属性， 有一个排除一个， 嵌套的也一样；

                    JsonConfig jsonConfig = new JsonConfig();

                    jsonConfig.setExcludes(new String[]{"beanB","beanC"});

                    jsonConfig.setIgnoreDefaultExcludes(true);

                    jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);

                    JSONArray jsonArray = JSONArray.fromObject(beanAList, jsonConfig);