[Migration text] The tag of struts2/webwork is really not the most disgusting, only more disgusting.

Source: Internet
Author: User
Struts2 has been leading a lot of irregular labels. Today we finally have the most disgusting problem so far.
There is a tag with if to judge whether the string is equal, and it cannot work normally for half an afternoon...
I finally found the answer to a FAQ on the Internet.

Why won't the 'if' tag evaluate a one char string?

<ww:if test="#myObj.myString == 'A'">Why doesn't this work when myString is equal to A?</ww:if>

Ognl will interpret 'A' as a char type and not a string. Simple Solution-flip the double and single quotes.

 <ww:if test='#myObj.myString == "A"'>This works!</ww:if>

Alternatively, you can escape the double quotes in the string:

<WW: If test = "# myobj. mystring = \" A \ ""> this works! </WW: If>

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