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yanhua365/freemarker_null_error.log

Created December 20, 2013 08:02
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FreeMarker提示使用了空（null）变量，并提示了正确的使用方法。
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freemarker_null_error.log
Tip: If the failing expression is known to be legally null/missing,
either specify a default value with myOptionalVar!myDefault,
or use <#if myOptionalVar??>when-present<#else>when-missing</#if>.
(These only cover the last step of the expression;
to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)??
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