我正在尝试在hdfs中应用样式表，它将xml的String转换为csv。我已将xml存储为字符串数组。该程序与样式表的一个应用程序完美配合。但是，当它遍历循环时，转换失败。它只会将String数组的第一个元素转换为csv。之后我得到以下错误。
public class xmlToCsv {
public void xmlTransform (String[] xmlFiles, String out_hdfsPath, String styleSheet) throws ParserConfigurationException, SAXException, IOException, TransformerFactoryConfigurationError, TransformerException {
//Set system hdfs config
Configuration configuration = new Configuration();
FileSystem hdfs = FileSystem.get(configuration);
//filesteam for stylesheet application in hdfs
Path style_path = new Path(styleSheet);
FSDataInputStream style_stream = hdfs.open(style_path);
StreamSource stylesource = new StreamSource(style_stream);
for (int i = 1; i < xmlFiles.length; i++){
//application of xsl tranformation
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
Document document = builder.parse(new InputSource(new StringReader(xmlFiles[i])));
Transformer transformer = TransformerFactory.newInstance().newTransformer(stylesource);
Source source = new DOMSource(document);
//output path of csv file
Path out_path = new Path(out_hdfsPath+i);
OutputStream os = hdfs.create(out_path);
Result outputTarget = new StreamResult(os);
transformer.transform(source, outputTarget);
os.close();
}
}
}
ERROR: 'Could not compile stylesheet'
FATAL ERROR: 'Stream closed'
:Stream closed
Exception in thread "main" javax.xml.transform.TransformerConfigurationException: Stream closed
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:1015)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:789)
at hdfs_rw.xmlToCsv.xmlTransform(xmlToCsv.java:55)
at hdfs_rw.hdfs_rw.main(hdfs_rw.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.io.IOException: Stream closed
at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:839)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:903)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at org.apache.xerces.impl.XMLEntityManager$RewindableInputStream.read(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.compiler.Parser.parse(Parser.java:431)
at com.sun.org.apache.xalan.internal.xsltc.compiler.Parser.parse(Parser.java:506)
at com.sun.org.apache.xalan.internal.xsltc.compiler.XSLTC.compile(XSLTC.java:466)
at com.sun.org.apache.xalan.internal.xsltc.compiler.XSLTC.compile(XSLTC.java:568)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:974)
... 9 more
java.io.IOException: Stream closed
at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:839)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:903)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:704)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at org.apache.xerces.impl.XMLEntityManager$RewindableInputStream.read(Unknown Source)
at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
at org.apache.xerces.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.compiler.Parser.parse(Parser.java:431)
at com.sun.org.apache.xalan.internal.xsltc.compiler.Parser.parse(Parser.java:506)
at com.sun.org.apache.xalan.internal.xsltc.compiler.XSLTC.compile(XSLTC.java:466)
at com.sun.org.apache.xalan.internal.xsltc.compiler.XSLTC.compile(XSLTC.java:568)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:974)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:789)
at hdfs_rw.xmlToCsv.xmlTransform(xmlToCsv.java:55)
at hdfs_rw.hdfs_rw.main(hdfs_rw.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
答案 0 :(得分：1)
移动线
Transformer transformer = TransformerFactory.newInstance().newTransformer(stylesource);
超出for循环。