无法执行的JasperReports：ClassNotFoundException的

试图在Eclipse 6.3.1简单的报告执行的JasperReports：无法执行的JasperReports：ClassNotFoundException的

package test.jaspertest; 

import java.util.HashMap; 

import net.sf.jasperreports.engine.JasperReport; 
import net.sf.jasperreports.engine.JREmptyDataSource; 
import net.sf.jasperreports.engine.JRException; 
import net.sf.jasperreports.engine.JasperCompileManager; 
import net.sf.jasperreports.engine.JasperExportManager; 
import net.sf.jasperreports.engine.JasperFillManager; 
import net.sf.jasperreports.engine.JasperPrint; 

public class JasperTest { 

    public static void main(String[] args) { 
     System.out.println("Start"); 

     try { 
      JasperReport jasperReport = JasperCompileManager.compileReport("reports/simple.xml"); 
      JasperPrint jasperPrint = JasperFillManager.fillReport(
       jasperReport, 
       new HashMap(), 
       new JREmptyDataSource()); 
      JasperExportManager.exportReportToPdfFile(jasperPrint, "reports/simple.pdf"); 
     } catch (JRException e) { 
      e.printStackTrace(); 
     } 

    } 

}

有这种出消息：

Apr 11, 2017 1:59:41 PM net.sf.jasperreports.extensions.DefaultExtensionsRegistry loadRegistries 
WARNING: Extension resource jar:file:/C:/Portable%20Programs/eclipse/packages/jasperreports/dist/jasperreports-javaflow-6.3.1.jar!/jasperreports_extension.properties was found to be a duplicate of jar:file:/C:/Portable%20Programs/eclipse/packages/jasperreports/dist/jasperreports-6.3.1.jar!/jasperreports_extension.properties in classloader [email protected] 
Start 
Exception in thread "main" java.lang.NoClassDefFoundError: com/lowagie/text/DocumentException 
    at net.sf.jasperreports.engine.JasperExportManager.exportToPdfFile(JasperExportManager.java:150) 
    at net.sf.jasperreports.engine.JasperExportManager.exportReportToPdfFile(JasperExportManager.java:503) 
    at test.jaspertest.JasperTest.main(JasperTest.java:24) 
Caused by: java.lang.ClassNotFoundException: com.lowagie.text.DocumentException 
    at java.net.URLClassLoader.findClass(Unknown Source) 
    at java.lang.ClassLoader.loadClass(Unknown Source) 
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) 
    at java.lang.ClassLoader.loadClass(Unknown Source) 
    ... 3 more

Java版本1.8.0.121。我对Java不是很熟悉，请任何人都可以帮我解决这个问题？提前致谢！

来源

2017-04-11 tombones

你错过了你的类路径中的itext-2.1.7.jar。添加它，错误将消失。 itext.jar是jarperReport需要的依赖关系

来源

2017-04-11 13:22:12 Jens

无法执行的JasperReports：ClassNotFoundException的

回答

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