为什么JasperReports尝试加载org.springframework.core.io.Resource类？

Question

Recently we integrated JasperReports to our enterprise application. Some of our users get java.lang.NoClassDefFoundError: org/springframework/core/io/Resource at client side which is a Swing application. The jnlp file contains jasperreports.jar and no import of this class occurs in our code. Why does JasperReports try to load this class ?

Answer 1

The spring-core.jar is an optional jasper report dependency

Why is it trying to load it?,

I would check the jrxml files and the jasperreports_extension.properties .

Answer 2

I recreate the error on my pc and relaize that jasperreports-chart-themes.jar uses spring-core.jar and jasperreports-functions.jar uses jodatime api. so remove these jar if you really do not need otherwise add the depended jars.

Answer 3

I got the same issue with jasperreports-fonts-3.7.1

I'm using this jar with jasperreports-3.7.1 to display UTF8 character (using DejaVu Sans font)

The spring dependency is used in jasperreports_extension.properties of jasperreports-fonts-

I added the spring-core and spring-beans 2.5 to the classpath and the problem is solved