javax.el.ELException: Cannot convert [ +data.resultList[i].catid+ ] of type [class java.lang.String]

求大神解答，catid在后台是短整型的数据类型   javax.el.ELException: Cannot convert [ +data.resultList[i].catid+ ] of type [class java.lang.String] to [class java.lang.Long]     at org.apache.el.lang.ELSupport.coerceToNum

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