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Struts2中的調試標記不斷收到此錯誤。任何想法可能導致這種情況?Struts2調試標記認爲toString()是未定義的
FreeMarker template error!
Expression stackObject.value.get(propertyName).toString() is undefined on line 58, column 122 in template/simple/debug.ftl.
The problematic instruction:
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==> ${stackObject.value.get(propertyName).toString()?html} [on line 58, column 120 in template/simple/debug.ftl]
in include "/${parameters.templateDir}/simple/debug.ftl" [on line 23, column 1 in template/xhtml/debug.ftl]
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