错误说明:
严重: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.hr.entity.product
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.hr.entity.product
错误说明:JSP读不懂EL表达式
错误解释:应当引入JS表达式的库
