问题
I'm new with iReport and trying the following: I want the report to notice in the detail-band when a special field has another value as it has the entry before. I think that could be possible if I use a variable but I have no idea how to do that. Can someone help me out with an example so I can see the right syntax?
I tried to create a parameter $P{MyField} and fill it with a statement in the "Print when" like this:
($P{MyField}.put("MyField", $F{MyField}) == null ) ? Boolean.FALSE:Boolean.FALSE
I found that in another Report and wanted to use it...
The parameter was set as
java.util.Map
with default
new java.util.HashMap()
I think I'm totally wrong... so if someone could help?
回答1:
You can add a rectangle, for example, with a special style, and set the condition at the porperty "print when expression", so the special rectangle would only be printed when it really should be.
来源：https://stackoverflow.com/questions/4138864/ireport-using-variables