java json字符串转换为对象，转换为list

json字符串转换为对象

JSONObject jo =JSONObject.fromObject(sysNumberRuleJsonStr);//这一步报错(运行时):The constructor JSONObject(String) is undefined

应改为：

JSONObject jo = new JSONObject();

JSONObject jsonObject = jo.fromObject(sysNumberRuleJsonStr);

SysNumberRule rule = (SysNumberRule) JSONObject.toBean(jo, SysNumberRule.class);

request.setAttribute("sysNumberRule", rule);

json字符串转换为list

String sysNumberRuleRows = request.getParameter("sysNumberRuleRows");

List list = new ArrayList();

JSONArray json = JSONArray.fromObject(sysNumberRuleRows);

rowslist = JSONArray.toList(json, SysNumberRule.class);

or

rowslist = JSONArray.toCollection(json, SysNumberRule.class);