Struts2
actionErrors，
fieldErrors由
ActionSupport。您可以填写操作错误，也可以由验证拦截器产生。例如
addFieldError("aggregation", “aggregationId not specified.”);addFieldError("moreInfo", “https://www.iiitb-swn.com/docs/api/errors/40924”);然后返回
json结果作为响应。
<result name="input" type="json"> <param name="statusCode">409</param> <param name="errorCode">40924</param> <param name="ignoreHierarchy">false</param> <param name="includeProperties">^actionErrors.*,^fieldErrors.*</param></result>
