Velocity 将 int i = 0 解释为 boolean false

Question

如果我检查 var int i = 0 是否存在，我会得到错误的结果：

#if($i)
  <output>$i</output>
#end

结果：

i not defined --> no output
i = 0         --> no output
i = 1         --> <output>1</output>

我如何告诉 velocity 考虑定义的值 0？

i not defined --> no output
i = 0         --> <output>0</output>
i = 1         --> <output>1</output>

Answer 1

您可以通过 operator

查看

#if($i >= 0)
  <output>$i</output>
#end

Velocity is interpreting int i = 0 as boolean false