NetBeans：JasperReport异常

Question

I'm working on a project that needs Jasper reporting, I have used the code fragment mentioned below to view the report in NetBeans 6.1 (the report is originally generated and compiled using iReport 3.6.0),my requirement is to print this report using a simple Swing application.

Code fragment:

    public class JasperCheck {

    public static void main(String[] args) {
        String reportSource = "E:/Projects/report.jrxml";
        String reportDest = "E:/Projects/report.html";

        Map<String, Object> params = new HashMap<String, Object>();
        try {

            JasperReport jasperReport = JasperCompileManager.compileReport(reportSource);

            JasperPrint jasperPrint =
                    JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());

            JasperExportManager.exportReportToHtmlFile(jasperPrint, reportDest);

            JasperViewer.viewReport(jasperPrint);
        } catch (JRException ex) {
            System.out.println(ex);
        }
    }
}

But when I run this it gives an exception that I couldn't figure out.

Exception:
Exception in thread "main" java.lang.NoClassDefFoundError: org/codehaus/groovy/control/CompilationFailedException
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:247)
        at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForRealName(JRClassLoader.java:157)
        at net.sf.jasperreports.engine.util.JRClassLoader.loadClassForName(JRClassLoader.java:115)
        at net.sf.jasperreports.engine.JasperCompileManager.getCompiler(JasperCompileManager.java:511)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:215)
        at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:148)
        at src.JasperCheck.main(JasperCheck.java:31)
Caused by: java.lang.ClassNotFoundException: org.codehaus.groovy.control.CompilationFailedException
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
        ... 8 more
Java Result: 1

Thanks.

Answer 1

It means that the groovy library dependency is missing.

We can add the groovy-1.7.5.jar (it depends on JasperReports version) in classpath to resolve this issue.

We can find the groovy 's dependency in the the JasperReports library pom.xml file. For the JR 4.5.0 version it is:

<dependency>
        <groupId>org.codehaus.groovy</groupId>
        <artifactId>groovy-all</artifactId>
        <version>1.7.5</version>
        <scope>compile</scope>
        <optional>true</optional>
</dependency>

In case of using maven we can add this dependency to the project:

<dependency>
        <groupId>org.codehaus.groovy</groupId>
        <artifactId>groovy-all</artifactId>
        <version>1.7.5</version>
</dependency>

Answer 2

这是因为，在创建报告时，您已选择语言为Grrovy，但这在java程序中使用jrxml。在jrxml文件中，

Answer 3

Try:

JasperExportManager.exportReportToHtmlFile(jasperPrint, reportDest);

See JasperExportManager.exportReportToHtmlFile() . I assume that's the method you mean.