iReport / jasperReports如果节点存在问题，我如何检入xml数据源

Question

i new to iReport , my question is in the expression editor , how can i build expression that checks if xml node
extincts and base on that print string
i have this expression that returns me null in the result :

( $F{root_customer}.isEmpty() ? "Entity name:" :"Customer id:" )

the root_customer does not exsict in the xml

Answer 1

Try something along the following lines in your expression.

( $F{root_customer} == null ? "Entity name:" + $F{someField}  
    :"Customer id:" +  + $F{root_customer})