java - 无法使用 JasperReports 生成 PDF 报告

Question

这个错误让我大吃一惊，因此非常感谢您的帮助。问题是，我正在处理一个使用 JSF 的 Web 应用程序，其中需要生成报告以便用户可以下载它。但是，每当我尝试生成报告时，我都会得到以下堆栈跟踪:

java.lang.NoClassDefFoundError: Could not initialize class net.sf.jasperreports.engine.util.JRStyledTextParser
    net.sf.jasperreports.engine.fill.JRBaseFiller.<init>(JRBaseFiller.java:110)
    net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:69)
    net.sf.jasperreports.engine.fill.JRVerticalFiller.<init>(JRVerticalFiller.java:57)
    net.sf.jasperreports.engine.fill.JRFiller.createBandReportFiller(JRFiller.java:200)
    net.sf.jasperreports.engine.fill.JRFiller.createReportFiller(JRFiller.java:215)
    net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:84)
    net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:456)
    net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:863)
    br.com.ead.jasper.RelatorioUtil.geraRelatorio(RelatorioUtil.java:43)
    br.com.ead.web.RelatorioBean.gerarRelatorio(RelatorioBean.java:31)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:498)
    javax.el.BeanELResolver.invoke(BeanELResolver.java:158)
    javax.el.CompositeELResolver.invoke(CompositeELResolver.java:79)
    org.apache.el.parser.AstValue.getValue(AstValue.java:159)
    org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
    com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
    org.primefaces.component.filedownload.FileDownloadActionListener.processAction(FileDownloadActionListener.java:53)
    javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
    javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:813)
    javax.faces.component.UICommand.broadcast(UICommand.java:300)
    javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
    javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
    com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
    javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
    br.com.ead.filter.CharsetFilter.doFilter(CharsetFilter.java:26)
    br.com.ead.filter.ConexaoHibernateFilter.doFilter(ConexaoHibernateFilter.java:42)
    br.com.ead.filter.LoginFilterProfessor.doFilter(LoginFilterProfessor.java:35)

这个错误似乎非常简单。看起来这个类 class net.sf.jasperreports.engine.util.JRStyledTextParser 丢失了，但它实际上在我的类路径中。我只是找不到一种方法来完成这项工作!我使用 Maven 作为依赖管理器，所以这是我的依赖项:

<dependencies>

        <!-- https://mvnrepository.com/artifact/joda-time/joda-time -->
        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.8</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/org.primefaces/primefaces -->
        <dependency>
            <groupId>org.primefaces</groupId>
            <artifactId>primefaces</artifactId>
            <version>5.0</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.3.11.Final</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.23</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/net.sf.jasperreports/jasperreports -->
        <dependency>
            <groupId>net.sf.jasperreports</groupId>
            <artifactId>jasperreports</artifactId>
            <version>5.0.0</version>
        </dependency>


        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-api</artifactId>
            <version>2.2.9</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.itextpdf/itext-pdfa -->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-pdfa</artifactId>
            <version>5.5.11</version>
        </dependency>


        <dependency>
            <groupId>com.sun.faces</groupId>
            <artifactId>jsf-impl</artifactId>
            <version>2.2.9</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.primefaces.extensions/all-themes -->
        <dependency>
            <groupId>org.primefaces.extensions</groupId>
            <artifactId>all-themes</artifactId>
            <version>1.0.8</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/javax.servlet.jsp.jstl-api -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>javax.servlet.jsp.jstl-api</artifactId>
            <version>1.2.1</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils -->
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.3</version>
        </dependency>


        <!-- https://mvnrepository.com/artifact/commons-collections/commons-collections -->
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/commons-digester/commons-digester -->
        <dependency>
            <groupId>commons-digester</groupId>
            <artifactId>commons-digester</artifactId>
            <version>2.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.itextpdf/itextpdf -->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.11</version>
        </dependency>




        <!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-servlet-api -->
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-servlet-api</artifactId>
            <version>9.0.0.M26</version>
        </dependency>

        <dependency>
            <groupId>xml-apis</groupId>
            <artifactId>xml-apis</artifactId>
            <version>1.4.01</version>
        </dependency>



        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

再次感谢您的帮助。

Answer 1

因此，根据您的 pom，您使用的是 Jasper Reports 5.0.0 版本。基于this version对于相关类，导致此错误的静态 block 不会记录或打印静态初始化期间可能引发的任何错误。

您有两个选择:

1. 查看我链接的源代码，看看您是否可以确定静态初始化 block 中可能引发异常的原因，修复它，然后继续
2. 将您的 jasper reports 版本至少升级到 6.3.0。截至this version对于有问题的类，他们至少已经开始打印潜在问题的堆栈跟踪。这应该可以让您更好地了解实际错误是什么。