当前位置: <#list columns as column> ${column.name} freemarker.core.InvalidReferenceException: The following has evaluated to null or missing: ==> columns [in template "22873" at line 20, column 20] ---- Tip: If the failing expression is known to be legally refer to something that's null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: #list columns as column [in template "22873" at line 20, column 13] ---- -->
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发布时间:2018-11-02 11:17:04来源:  责任编辑:段绍玉



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