Java 使用数据库中保存的.jrtx

我正在尝试使用像blob一样保存的.jrtx文件

我以以下方式传递文件.jrtx：

InputStream docStyle = new ByteArrayInputStream(myBean.getDocStyle()); 
map.put("docStyle", docStyle);

在我的.jrxml文件中，我有：

<parameter name="docStyle" class="java.lang.Object"/>

我得到以下错误：

Caused by: org.xml.sax.SAXParseException: Premature end of file.
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1916)
at net.sf.jasperreports.engine.xml.JRXmlTemplateLoader.loadTemplate(JRXmlTemplateLoader.java:195)
... 78 more

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如何解决此问题？

问题是，一旦文件偏移位置计数器移动到文件末尾，读取流时，在其他时间使用相同的流，您将得到错误。我使用

docStyle.reset（）解决了这个问题

Caused by: org.xml.sax.SAXParseException: Premature end of file.
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.apache.commons.digester.Digester.parse(Digester.java:1916)
at net.sf.jasperreports.engine.xml.JRXmlTemplateLoader.loadTemplate(JRXmlTemplateLoader.java:195)
... 78 more