Java xml错误编码utf-8

Question

那么当我写它显示奇怪的字符时，我一直在阅读和我必须使用FileOutputStream来解决问题，但我很新，我不知道该怎么做。我的代码是错误的，有一个错误，build（xml），我不知道我是否会以这种方式编写输出文件。

<?xml version="1.0" encoding="UTF-8"?> 
<prueba> 
    <reg id="576340"> 
      <dato cant="680" id="1" val="-1" num="" desc="résd" /> 
      <dato cant="684" id="5" val="-1" num="" desc="да и вообще" /> 
      <dato cant="1621" id="1" val="-1" num="" desc="Hi" /> 
      <dato cant="1625" id="5" val="-1" num="" desc="Hola" /> 
    </reg> 
</prueba> 


public static void main(String[] args) throws FileNotFoundException, 
    JDOMException, IOException { 

SAXBuilder builder = new SAXBuilder(); 
File xml = new File("c:\\prueba3.xml"); 
Writer out = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(xml), "UTF8")); 
Document doc = (Document) new SAXBuilder().build(xml); 
Element raiz = doc.getRootElement(); 
List articleRow = raiz.getChildren("reg"); 

for (int i = 0; i < articleRow.size(); i++) { 

    Element row = (Element) articleRow.get(i); 
    List images = row.getChildren("dato"); 

    for (int j = 0; j < images.size(); j++) { 

     Element row2 = (Element) images.get(j); 
     String texto = row2.getAttributeValue("desc") ; 
     String id = row2.getAttributeValue("id"); 

     if ((texto != null) && (texto !="") && 
      (id.equals("1") || id.equals("2"))){     

     //row2.getChild("desc").setText("valor"); 
     out.append(row2.getAttribute("desc").setValue. 
        ("raúl").toString()); 
     } 
    } 
} 
out.flush(); 
out.close(); 
System.out.println("fin de programa"); 
} 

这些输出数据

<?xml version="1.0" encoding="UTF-8"?> 
<prueba> 
    <reg id="576340"> 
      <dato cant="680" id="1" val="-1" num="" desc="ra/> 
      <dato cant="684" id="5" val="-1" num="" desc="..?? ? ??????/> 
      <dato cant="1621" id="1" val="-1" num="" desc="ra/> 
      <dato cant="1625" id="5" val="-1" num="" desc="Hola" /> 
    </reg> 
    </prueba> 

日志错误

Exception in thread "main" org.jdom.input.JDOMParseException: Error on line 1 of document file:/c:/prueba3.xml: Final de archivo prematuro. 
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:530) 
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:905) 
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:884) 
at Prueba.main(Prueba.java:27)Caused by: org.xml.sax.SAXParseException; systemId: file:/c:/prueba3.xml; lineNumber: 1; columnNumber: 1; Final de archivo prematuro. 
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) 
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) 
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:518) 
... 3 moreCaused by: org.xml.sax.SAXParseException; systemId: file:/c:/prueba3.xml; lineNumber: 1; columnNumber: 1; Final de archivo prematuro. 
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) 
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.fatalError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLScanner.reportFatalError(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source) 
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source) 
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:518) 
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:905) 
at org.jdom.input.SAXBuilder.build(SAXBuilder.java:884) 
at Prueba.main(Prueba.java:27) 

我会感谢你的帮助。

Answer 1

根据目标的编码你必须决定如何将这些文件写入文件系统。你决定写'UTF8'。

Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(xml), "UTF8"));

你必须确保它加载了最新的程序知道它是在UTF-8编码。例如。记事本++允许选择与系统默认不同的编码。在大多数情况下，UTF-8不是系统默认的。所以你必须在加载文件时提供信息。

也请您查看Java FileReader encoding issue

Answer 2

与此内容例如文件：

<?xml version="1.0" encoding="UTF-8"?> 
<prueba> 
    <reg id="123456"> 
      <dato cantidad="680" id="1" val="-1" num="" desc="résd" /> 
      <dato cantidad="684" id="5" val="-1" num="" desc="да и вообще" /> 
      <dato cantidad="1621" id="1" val="-1" num="" desc="Hi" /> 
      <dato cantidad="1625" id="5" val="-1" num="" desc="Hola" /> 
    </reg> 
</prueba> 

可以使用DOM本地Java

实施例进行解析：

public static void main(String[] args) throws IOException, ParserConfigurationException, SAXException { 
    final File fXmlFile = new File("./Details2.xml"); 
    final DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance(); 
    final DocumentBuilder dBuilder = dbFactory.newDocumentBuilder(); 
    final Document document = dBuilder.parse(fXmlFile); 
    document.getDocumentElement().normalize(); 
    final NodeList regNodeList = document.getElementsByTagName("reg"); 
    for (int counter = 0; counter < regNodeList.getLength(); counter++) { 
     final Node nNode = regNodeList.item(counter); 
     System.out.println("Current Element :" + nNode.getNodeName()); 
     System.out.println("regs id : " + ((Element) nNode).getAttribute("id")); 
     final NodeList nList2 = ((Element) nNode).getElementsByTagName("dato"); 

     for (int counterChilds = 0; counterChilds < nList2.getLength(); counterChilds++) { 
     final Node nNode2 = nList2.item(counterChilds); 
     if (nNode2.getNodeType() == Node.ELEMENT_NODE) { 
      final Element eElement = (Element) nNode2; 
      System.out.println(String.format("Cantidad %s,id %s,val %s,num %s,Desc %s", 
      eElement.getAttribute("cantidad"), eElement.getAttribute("id"), 
      eElement.getAttribute("val"), eElement.getAttribute("num"), eElement.getAttribute("desc"))); 
    } 
    } 
} 
}