项目问题库

1.on: Failed to convert value of type ‘java.lang.String‘ to required type ‘java.lang.Long‘; nested exception is java.lang.NumberFormatException: For input string: "{parentId}"

2.org.springframework.expression.spel.SpelEvaluationException: EL1007E: Property or field ‘devicecId‘ cannot be found on null

答：是pcdevicec定义错误 mmap.put("pcdevicec", pcdevicecService.selectPcdevicecById(parentId));

3. 增加时，点击个改设备类别提示：

61:39 Uncaught ReferenceError: selectDevicectree is not defined
     at HTMLInputElement.onclick (1:39)

答：

4.

点击增加类别时出现空的

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原文：https://www.cnblogs.com/elite-2012/p/10862564.html