NullPointerException - 在jasper中生成報告

我在使用Jasper Reports生成報告時遇到問題。
我的意圖是爲每個用戶生成一個報告，但它只生成一個pdf。NullPointerException - 在jasper中生成報告

Grave: Error instantiating extensions registry for fonts 
    java.lang.NullPointerException 
     at net.sf.jasperreports.engine.fonts.SimpleFontFace.<init>(SimpleFontFace.java:83) 
     at net.sf.jasperreports.engine.fonts.SimpleFontFamily.createFontFace(SimpleFontFamily.java:316) 
     at net.sf.jasperreports.engine.fonts.SimpleFontFamily.setItalic(SimpleFontFamily.java:101) 
     at net.sf.jasperreports.engine.fonts.SimpleFontExtensionHelper.parseFontFamily(SimpleFontExtensionHelper.java:241) 
     at net.sf.jasperreports.engine.fonts.SimpleFontExtensionHelper.parseFontFamilies(SimpleFontExtensionHelper.java:204) 
     at net.sf.jasperreports.engine.fonts.SimpleFontExtensionHelper.loadFontFamilies(SimpleFontExtensionHelper.java:173) 
     at net.sf.jasperreports.engine.fonts.SimpleFontExtensionHelper.loadFontFamilies(SimpleFontExtensionHelper.java:142) 
     at net.sf.jasperreports.engine.fonts.SimpleFontExtensionsRegistryFactory.createRegistry(SimpleFontExtensionsRegistryFactory.java:63) 
     at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.instantiateRegistry(DefaultExtensionsRegistry.java:200) 
     at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.loadRegistries(DefaultExtensionsRegistry.java:175) 
     at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.loadRegistries(DefaultExtensionsRegistry.java:135) 
     at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.getRegistries(DefaultExtensionsRegistry.java:121) 
     at net.sf.jasperreports.extensions.DefaultExtensionsRegistry.getExtensions(DefaultExtensionsRegistry.java:98) 
     at net.sf.jasperreports.engine.util.JRStyledTextParser.<clinit>(JRStyledTextParser.java:76) 
     at net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:181) 
     at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:76) 
     at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:86) 
     at net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:56) 
     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.fillReport(JasperFillManager.java:247) 
     at sige.comunicacao.participante.ServletEmitirCertificadoTodosParticipantes.emitirCertificado(ServletEmitirCertificadoTodosParticipantes.java:250) 
     at sige.comunicacao.participante.ServletEmitirCertificadoTodosParticipantes.doPost(ServletEmitirCertificadoTodosParticipantes.java:102) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) 
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) 
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) 
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) 
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:172) 
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) 
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) 
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) 
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:873) 
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) 
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) 
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) 
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) 
     at java.lang.Thread.run(Unknown Source)

所產生異常的代碼片段是：

// Aqui ele cria o relatório 
         impressao = JasperFillManager.fillReport(pathJasper 
           + "/Certificado_Conclusao.jasper", parametros, con); 

         // exporta para pdf 
         JasperExportManager.exportReportToPdfFile(impressao, path 
           + "/Certificado_Conclusao_" + cpf + ".pdf");

我使用碧玉報告3.7.2

任何人知道如何解決這個問題？預先感謝您

來源

2012-08-09 Felipe Queiroz

那麼，你認爲這是否行得通呢？ – 2012-08-09 21:57:07

我認爲你應該修復你的模板（或字體定義） – 2012-08-10 05:55:15