kazuhiko.mitsuoka

Eclipse4.16 JDK8 JasperReport 6.20.0 In the above environment, I have created a JasperReport class in an existing project. The application will be J2EE. I have placed the library in the lib folder and created it so that the library is also included in the ear file through the classpath. Ant builds successfully, but I get NoClassDefFoundError and ClassNotFoundException at runtime. java.lang.NoClassDefFoundError: net.sf.jasperreports.engine.JRDataSource ・・・・ Caused by: java.lang.ClassNotFoundException: net.sf.jasperreports.engine.JRDataSource The library placed in lib is as follows jasperreports-6.20.0.jar jasperreports-castor-6.20.0.jar jasperreports-chart-customizers-6.20.0.jar jasperreports-chart-themes-6.20.0.jar jasperreports-fonts-6.20.0.jar jasperreports-functions-6.20.0.jar jasperreports-metadata-6.20.0.jar I don't know what is causing this. Please let me know how to deal with it.

I installed Jasper Studio 6.20.0 as a plugin with eclipse 4.16. The installation went without error. However, when I create a project in Jasper Studio and right-click on the project, the Jasper Report does not appear, even in other. Is there some setting I need to do? Or is there a relationship between the eclipse version and the Jasper Studio version? Thank you in advance for your answer.