struts2 标签 if 判断一个字符

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注意写法
Why won't the 'if' tag evaluate a one cha

If care is not taken with the quoting of literals, the expression language (OGNL) will misinterpret a char as a String.
错误写法
if test="aStringProperty == 'A'"> Why doesn't this work when myString is equal to A? if>
The solution is simple: flip the double and single quotes.

正确写法
if test='aStringProperty == "A"'> This works! if>
Another solution is to escape the double quotes in the String.

正确写法
if test="aStringProperty == \"A\""> This works too! if>