Dear Lucas,
Sorry if i am wrong about that. let me clarify in here.
let say i have pojo :
public class FormColumnKey {
private Integer formcolumnFormId;
private String formcolumnName;
//sette-getter
}
in action class, i have list of clolumn:
private List<FormColumn> displayColumnList;
and then, i put all my column from table into the list, next i’ll iterate that
list in JSP. so this is what i’ve done in JSP:
<s:iterator value="displayColumnList" var="a">
<s:textfield name="${a.formcolumnName}" cssClass="form-control
form-control-md text-md" style="simple" placeholder="Value 1" />
</s:iterator>
the jsp has error:
Struts Problem Report
Struts has detected an unhandled exception:
Messages:
/pages/common/genericform/genericMain.jsp (line: 165, column: 24) According to
TLD or attribute directive in tag file, attribute name does not accept any
expressions
File: org/apache/jasper/compiler/DefaultErrorHandler.java
Line number: 41
cause the error above, then i state attribute name on struts tag does not
accept any expressions. if i test to just print like code bellow thats no
problem:
<s:iterator value="displayColumnList" var="a">
${a.formcolumnName}
</s:iterator>
so, i read your documentation about the expression, then i change my code
bellow:
<s:iterator value="displayColumnList" var="a">
<s:textfield name="%{formcolumnName}" cssClass="form-control
form-control-md text-md" style="simple" placeholder="Value 1" />
</s:iterator>
it works perfectly, thank you Lucas.
Regards
> On 20 Feb 2020, at 16.16, Lukasz Lenart <[email protected]> wrote:
>
> wt., 18 lut 2020 o 17:04 M Huzaifah <[email protected]> napisał(a):
>> Thank you Lucas, my goal is render the struts tag based on list of column
>> name that i've set before. So i have to iterate the list of column using
>> jstl than put the "name" on attribut name in struts tag. From here, i
>> think i miss understanding about struts tag. I use struts 2.5x that not
>> support for expressions anymore.
>
> Wait, what? Struts tags do not support expressions? Where did you find
> such information? Did you read that?
> https://struts.apache.org/tag-developers/tag-syntax.html (improved
> version I'm working on right now
> https://struts.staged.apache.org/tag-developers/tag-syntax.html)
>
> Also Struts tags are using our internal mechanism which prevents
> evaluating malicious expressions, in case of using JSTL you don't have
> such control and as those tags are out of Struts control you can
> mistakenly inject a malicious code
> https://struts.apache.org/security/#internal-security-mechanism
>
> Also using JSTL and Struts tags in the same JSP is like using Java and
> Kotlin to write the same code. Anyway, Bad Idea.
>
>
> Regards
>
> --
> Łukasz
> + 48 606 323 122 http://www.lenart.org.pl/
>
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