net.sf.json.JSONException: There is a cycle in the hierarchy! 异常解决

JsonConfig jsonConfig = new JsonConfig();
jsonConfig.setCycleDetectionStrategy(CycleDetectionStrategy.LENIENT);
jsonConfig.registerJsonBeanProcessor(java.sql.Date.class,new JsDateJsonBeanProcessor());

JSONArray jsonObject = JSONArray.fromObject(list,jsonConfig);

可解决该异常出现