出现了一个关于json和struts2的问题，请大神帮忙解答一下！！！HTTP Status 500 - org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: java.lang.IllegalAccessException: Class org.apache.struts2.json.JSONWriter can not access a member of class org.hibernate.persister.walking.internal.EntityIdentifierDefinitionHelper$1 with modifiers "public"
应该是json格式错误了，仔细看看