Concat two String in JSF EL expression [duplicate]

Question

I have the following el expression:

<af:outputText value="#{viewArticle.publish ? ('Publish on ' + viewArticle.publishDate + ' by ' + viewArticle.publishFirstName + ' ' + viewArticle.publishLastName) : 'Draft version'}"/>

But I am getting

java.lang.NumberFormatException: For input string: "Publish on "

How can I join the string?

Harless

You have to write your own EL string concat function, because EL understands + as an arithmetic operation. – Top

@refrigerator that means in el this kind of function not available? – Harless

Actually you can, if the EL version is 2.0+ using concat method, which version of ADF Faces are you using? – Top

@refrigerator I have ADF 11.1.1.6.0 which use jsf 1.2 – Harless

technology.amis.nl/2012/01/17/… this will help you :) – Top

You have to write a custom EL function. This example will help you :) – Top

Answer 1

You can use the String.concat function:

<af:outputText value="#{viewArticle.publish ? 'Publish on '.concat(viewArticle.publishDate).concat(' by ').concat(viewArticle.publishFirstName).concat(' ').concat(viewArticle.publishLastName) : 'Draft version'}"/>

Backler

Answer 2

You should write

value  = "#{someBean.aProperty}  something you want in between #{someBean.anotherProperty}"

Stoke

That works for the attribute but does not help if you need the concatenated string as a function parameter in a JSF EL – Incertitude