Accessing/importing user defined classes in jrxml

问题:

Have anyone tried to import user defined classes in jasper report (.jrxml file)? I want to use some (user defined) Util class inside my jasper report to cook some bean attributes. I am using Javabean datasource

Please let me know if you need further clarification.

syntax to import class is

<import value="java.util.HashMap"/>

I want to use

<import value="mypackage.MyUtil" />
 ....
 ....
<field name="myVar" class="java.lang.String">
    <fieldDescription><![CDATA[MyUtil.cook(myData)]]>
    </fieldDescription>
</field>

The simple definition for MyUtil.java could be

package mypackage;
public class MyUtil
{
    public static String cook(String data)
    {
        return data + "_cooked";
    }
}

回答1:

I think I should have tried sufficiently before asking this.

There is nothing extra needed apart from There are two sections in jrxml: 1. Defining fields from javabean source 2. Using fields defined in step 1. to populate values in detail band

I was trying to cook the value of javabean members even before they are used to create fields So, jasper was trying to parse that 'expression' as javabean member.

Following is wrong

<field name="myVar" class="java.lang.String">
     <fieldDescription><![CDATA[MyUtil.cook(myData)]]>
     </fieldDescription>
</field>

When I used the Util class on field value, it worked.

<textField>
    <reportElement x="200" y="0" width="100" height="13"/>
    <textElement/>
    <textFieldExpression class="java.lang.String">
         <![CDATA[MyUtil.cook($F{myVar})]]>
    </textFieldExpression>
</textField>

Thanks Nayn

回答2:

You have to set the classpath in your iReport. It depends on its version, but is generally under Settings/Classpath