为什么我会收到 org.xml.sax.SAXParseException 异常？

Question

为什么我会收到 org.xml.sax.SAXParseException 异常？

3

我正在使用 OpenBravoPOS v2.30，有人知道吗？它是一个具有免费许可证的 POS（点 of 销售）系统。我试图改进它，但在我的一台测试计算机上失败了。

首先，我已经阅读了关于类似情况的 stackoverflow 帖子，但都无济于事。

以下是完整的异常输出：

WARNING: Analysis error. Invalid XML file.
org.xml.sax.SAXParseException: Premature end of file.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(ErrorHandlerWrapper.java:174)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:388)
    at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(XMLScanner.java:1427)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:1056)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:647)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
    at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
    at com.openbravo.pos.sales.JTicketLines.<init>(JTicketLines.java:70)
    at com.openbravo.pos.sales.JTicketLinesMRB.<init>(JTicketLinesMRB.java:22)
    at com.openbravo.pos.sales.JRefundLinesMRB.loadTicketLines(JRefundLinesMRB.java:97)
    at com.openbravo.pos.sales.JRefundLines.<init>(JRefundLines.java:42)
    at com.openbravo.pos.sales.JRefundLinesMRB.<init>(JRefundLinesMRB.java:44)
    at com.openbravo.pos.sales.JTicketCatalogLinesMRB.newRefundLines(JTicketCatalogLinesMRB.java:23)
    at com.openbravo.pos.sales.JTicketCatalogLines.<init>(JTicketCatalogLines.java:48)
    at com.openbravo.pos.sales.JTicketCatalogLinesMRB.<init>(JTicketCatalogLinesMRB.java:17)
    at com.openbravo.pos.sales.JPanelTicketEditsMRB.getSouthComponent(JPanelTicketEditsMRB.java:52)
    at com.openbravo.pos.sales.JPanelTicket.init(JPanelTicket.java:272)
    at com.openbravo.pos.sales.JPanelTicketEditsMRB.init(JPanelTicketEditsMRB.java:77)
    at com.openbravo.pos.forms.JRootApp.getBean(JRootApp.java:409)
    at com.openbravo.pos.forms.JPrincipalApp.showTask(JPrincipalApp.java:378)
    at com.openbravo.pos.forms.MenuPanelAction.actionPerformed(MenuPanelAction.java:46)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
    at org.jdesktop.swingx.JXHyperlink.fireActionPerformed(JXHyperlink.java:244)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    at java.awt.Component.processMouseEvent(Component.java:6290)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
    at java.awt.Component.processEvent(Component.java:6055)
    at java.awt.Container.processEvent(Container.java:2039)
    at java.awt.Component.dispatchEventImpl(Component.java:4653)
    at java.awt.Container.dispatchEventImpl(Container.java:2097)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166)
    at java.awt.Container.dispatchEventImpl(Container.java:2083)
    at java.awt.Window.dispatchEventImpl(Window.java:2482)
    at java.awt.Component.dispatchEvent(Component.java:4481)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:648)
    at java.awt.EventQueue.access$000(EventQueue.java:84)
    at java.awt.EventQueue$1.run(EventQueue.java:607)
    at java.awt.EventQueue$1.run(EventQueue.java:605)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
    at java.awt.EventQueue$2.run(EventQueue.java:621)
    at java.awt.EventQueue$2.run(EventQueue.java:619)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:618)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

它指向那一行代码：

private static SAXParser m_sp = null;
 public JTicketLines(String ticketline) {

        initComponents();

        ColumnTicket[] acolumns = new ColumnTicket[0];

        if (ticketline != null) {
            try {
                if (m_sp == null) {
                    SAXParserFactory spf = SAXParserFactory.newInstance();
                    m_sp = spf.newSAXParser();
                }
                ColumnsHandler columnshandler = new ColumnsHandler();
                m_sp.parse(new InputSource(new StringReader(ticketline)), columnshandler);
                acolumns = columnshandler.getColumns();

            } catch (ParserConfigurationException ePC) {
                logger.log(Level.WARNING, LocalRes.getIntString("exception.parserconfig"), ePC);
            } catch (SAXException eSAX) {
                logger.log(Level.WARNING, LocalRes.getIntString("exception.xmlfile"), eSAX);
            } catch (IOException eIO) {
                logger.log(Level.WARNING, LocalRes.getIntString("exception.iofile"), eIO);
            }
        }

        initColumns(acolumns);

    }

为什么会出现这个异常？是XML文件的问题吗？在不同的计算机上应该是相同的XML文件。

LoadTicketLines：

protected void loadTicketLines(DataLogicSystem dlSystem) {
        ticketlines = new JTicketLines(dlSystem.getResourceAsXML("Ticket.Line"));
    }

XML文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<!-- 
    Openbravo POS is a point of sales application designed for touch screens.
    Copyright (C) 2007-2009 Openbravo, S.L.
    http://sourceforge.net/projects/openbravopos

    This file is part of Openbravo POS.

    Openbravo POS is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Openbravo POS is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Openbravo POS.  If not, see <http://www.gnu.org/licenses/>.
 -->

<line>

<!--    <column name="label.item" width="125" align="left" value="&lt;html&gt;#if ($ticketline.isProductCom()) &lt;i&gt;*&amp;nbsp;&amp;nbsp;${ticketline.printNameAndDiscount()}&lt;/i&gt; #else ${ticketline.printNameAndDiscount()} #end&lt;br&gt;${ticketline.getProductAttSetInstDesc()}"/>   -->

    <column name="label.item" fontsize="16" width="125" align="left" value="${ticketline.printName()}"/>

    <column name="label.units" fontsize="16" width="50" align="right" value="x${ticketline.printMultiply()}"/>
<!--  PARTY -->
<column name="label.pvp" fontsize="16" width="50" align="right" value="${ticketline.printPVP()}"/>
<column name="label.discount" fontsize="16" width="50" align="right" value="${ticketline.printDicountPercent()}"/>
<column name="label.TotalLine" fontsize="16" width="80" align="right" value="${ticketline.printValue()}"/>
</line>

抱歉如果它包含大量代码，不知道如何更好地解释

- DavidM

2

什么是ticketline？堆栈跟踪告诉您遇到了“文件过早结束”的问题，因此我建议检查XML文件，因为它可能没有格式良好。 - andyb

1

SAXParser声明为静态变量可能会引起问题，周围有什么代码？ - Kuchi

2

我会修改我的问题以展示XML。 - DavidM

我尝试移除了静态声明但仍无法工作。但至少感谢你的努力帮忙。 - DavidM

正如@Kuchi指出的那样，SAXParser不是线程安全的...它可能应该是一个局部变量。但从你的使用情况来看，我不认为这是问题，因为每个XML文件似乎都在构造一个新的JTicketLines。你的XML格式良好，所以不确定发生了什么。你绝对确定这就是传递给解析器的XML吗？你把它输出到某个地方了吗？还是你认为加载它的代码会原样返回该文件？ - Rand

1个回答

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可以查看英文原文，
原文链接

- Mueretee · Accepted Answer

我也在OpenBravoPOS工作，我认为你错误地认为这是导致错误的XML文件。

请检查 Ticket.LineRefund 而不是 Ticket.Line 来确定是否存在错误。

如果我回复晚了，请见谅。