1. 首页
  2. 问答
  3. NullPointerException异常而产生碧玉报告

NullPointerException异常而产生碧玉报告

2012-01-11 129 views
0

我想在Liferay的Portlet创建碧玉报告，但我得到以下错误NullPointerException异常而产生碧玉报告

我的代码是：
字符串reportSource =“d：/ EMR /开发/ EMR工作空间/ LMS /reports/HibernateQueryDemoReport.jrxml“;
String reportDest =“D：/EMR/Dev/EMR-workspace/LMS/reports/test_jasper.html”;

try{ 
     JasperReport jasperReport = JasperCompileManager.compileReport(reportSource); 
     JasperFillManager.fillReportToFile("D:/EMR/Dev/EMR-workspace/LMS/reports/DbReport.jasper",new HashMap(), connection); 
     JasperExportManager.exportReportToHtmlFile(jasperPrint, reportDest); 
     JasperViewer.viewReport(jasperPrint); 
    }catch (JRException ex) { 
     System.out.println(ex);   
     }

而且我得到以下异常

java.lang.NullPointerException 
    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.util.ClassUtils.instantiateClass(ClassUtils.java:53) 
    at net.sf.jasperreports.extensions.ExtensionsEnvironment.createDefaultRegistry(ExtensionsEnvironment.java:80) 
    at net.sf.jasperreports.extensions.ExtensionsEnvironment.<clinit>(ExtensionsEnvironment.java:68) 
    at net.sf.jasperreports.engine.util.JRStyledTextParser.<clinit>(JRStyledTextParser.java:83) 
    at net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:121) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:77) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:87) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:57) 
    at net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:142) 
    at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:52) 
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417) 
    at net.sf.jasperreports.engine.JasperFillManager.fillReportToFile(JasperFillManager.java:199) 
    at net.sf.jasperreports.engine.JasperFillManager.fillReportToFile(JasperFillManager.java:95) 
    at com.ztscorp.lms.portlet.SurveyReportController.processSearchSurvey(SurveyReportController.java:102) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
    at java.lang.reflect.Method.invoke(Method.java:597) 
    at javax.portlet.GenericPortlet.processAction(GenericPortlet.java:169) 
    at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:70) 
    at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:48) 
    at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:92) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.ztscorp.lms.utils.AuthenticateFilter.doFilter(AuthenticateFilter.java:99) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638) 
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:543) 
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:480) 
    at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:638) 
    at com.liferay.portlet.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:687) 
    at com.liferay.portlet.InvokerPortletImpl.processAction(InvokerPortletImpl.java:360) 
    at com.liferay.portal.action.LayoutAction.processPortletRequest(LayoutAction.java:784) 
    at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:582) 
    at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:232) 
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) 
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) 
    at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:153) 
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) 
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
    at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:508) 
    at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:485) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:309) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:121) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:182) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:254) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:638) 
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:444) 
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:382) 
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:310) 
    at com.liferay.portal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:134) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:261) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:110) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:182) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:222) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:126) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.cache.CacheFilter.processFilter(CacheFilter.java:442) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:45) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:254) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.servlet.filters.sso.ntlm.NtlmPostFilter.processFilter(NtlmPostFilter.java:81) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:196) 
    at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:179) 
    at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:123)

和

06:12:20,717 ERROR [jsp] java.lang.NullPointerException 
    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.util.ClassUtils.instantiateClass(ClassUtils.java:53) 
    at net.sf.jasperreports.extensions.ExtensionsEnvironment.createDefaultRegistry(ExtensionsEnvironment.java:80) 
    at net.sf.jasperreports.extensions.ExtensionsEnvironment.<clinit>(ExtensionsEnvironment.java:68) 
    at net.sf.jasperreports.engine.util.JRStyledTextParser.<clinit>(JRStyledTextParser.java:83) 
    at net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:121) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:77) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:87) 
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:57) 
    at net.sf.jasperreports.engine.fill.JRFiller.createFiller(JRFiller.java:142) 
    at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:52) 
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417) 
    at net.sf.jasperreports.engine.JasperFillManager.fillReportToFile(JasperFillManager.java:199) 
    at net.sf.jasperreports.engine.JasperFillManager.fillReportToFile(JasperFillManager.java:95) 
    at com.ztscorp.lms.portlet.SurveyReportController.processSearchSurvey(SurveyReportController.java:102) 
    at javax.portlet.GenericPortlet.processAction(GenericPortlet.java:169) 
    at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:70) 
    at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:48)

来源

2012-01-11 saloni

回答

0

我没有测试你的代码，但它看起来有点怪。不管怎么说，请检查下面的代码：

try{ 
    JasperReport jasperReport = JasperCompileManager.compileReport(reportDesign); 
    JasperPrint jasperPrint = JasperFillManager.fillReportToFile(jasperReport, new HashMap(), connection); 
    JasperExportManager.exportReportToHtmlFile(jasperPrint, reportDest); 
    JasperViewer.viewReport(jasperPrint); 
}catch (JRException ex) { 
    System.out.println(ex);   
}

来源

2012-01-11 10:32:21 bchetty

0

我最初的感觉说，它是由于共同的*罐子失踪， 我会建议增加commons.digest，commons.beutils，commons.logging建立并再试一次。 ！

希望它有助于。

来源

2012-01-11 15:02:21

2

我得到了同样的错误（下叠加）和固定它删除一个default.jasperreports.properties那是在我的src文件夹中。

Exception in thread "main" java.lang.NullPointerException 
     at java.lang.Class.forName0(Native Method) 
     at java.lang.Class.forName(Unknown Source) 
     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.util.JRSingletonCache.createInstance(JRSingletonCache.java:84) 
     at net.sf.jasperreports.engine.util.JRSingletonCache.getCachedInstance(JRSingletonCache.java:74) 
     at net.sf.jasperreports.engine.xml.JRXmlDigesterFactory.createParser(JRXmlDigesterFactory.java:1330) 
     at net.sf.jasperreports.engine.xml.JRXmlDigesterFactory.createDigester(JRXmlDigesterFactory.java:1307) 
     at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:205) 
     at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:170) 
     at net.sf.jasperreports.engine.xml.JRXmlLoader.load(JRXmlLoader.java:154) 
     at net.sf.jasperreports.engine.JasperCompileManager.compileReport(JasperCompileManager.java:146) 
     at com.cot.osppa.reports.OSPPAReportBuilder.main(OSPPAReportBuilder.java:74)

来源

2012-01-20 19:19:19 David

+0

你救了我：D我正在使用一个类似于旧版本的徘徊文件 – annouk 2012-12-04 22:04:04

相关问题

 相关问题