StAX - 使用XMLStreamWriter设置版本和编码

Question

我使用StAX创建XML文件,然后使用和XSD验证文件.

我在创建XML文件时遇到错误:

javax.xml.stream.XMLStreamException: Underlying stream encoding 'Cp1252' and input paramter for writeStartDocument() method 'UTF-8' do not match.
        at com.sun.xml.internal.stream.writers.XMLStreamWriterImpl.writeStartDocument(XMLStreamWriterImpl.java:1182)

这是代码片段:

XMLOutputFactory xof =  XMLOutputFactory.newInstance();

try{

  XMLStreamWriter xtw = xof.createXMLStreamWriter(new FileWriter(fileName));
  xtw.writeStartDocument("UTF-8","1.0");} catch(XMLStreamException e) {
  e.printStackTrace();

} catch(IOException ie) {

  ie.printStackTrace();

}

我在Unix上运行这段代码.有谁知道如何设置版本和编码样式？

Answer 1

我也会尝试使用createXMLStreamWriter()带输出参数.

[编辑]尝试,它通过更改createXMLStreamWriter行来工作:

XMLStreamWriter xtw = xof.createXMLStreamWriter(new FileOutputStream(fileName), "UTF-8");

[编辑2]做了一个更复杂的测试,记录:

String fileName = "Test.xml";
XMLOutputFactory xof =  XMLOutputFactory.newInstance();
XMLStreamWriter xtw = null;
try
{
  xtw = xof.createXMLStreamWriter(new FileOutputStream(fileName), "UTF-8");
  xtw.writeStartDocument("UTF-8", "1.0");
  xtw.writeStartElement("root");
  xtw.writeComment("This is an attempt to create an XML file with StAX");

  xtw.writeStartElement("foo");
  xtw.writeAttribute("order", "1");
    xtw.writeStartElement("meuh");
    xtw.writeAttribute("active", "true");
      xtw.writeCharacters("The cows are flying high this Spring");
    xtw.writeEndElement();
  xtw.writeEndElement();

  xtw.writeStartElement("bar");
  xtw.writeAttribute("order", "2");
    xtw.writeStartElement("tcho");
    xtw.writeAttribute("kola", "K");
      xtw.writeCharacters("Content of tcho tag");
    xtw.writeEndElement();
  xtw.writeEndElement();

  xtw.writeEndElement();
  xtw.writeEndDocument();
}
catch (XMLStreamException e)
{
  e.printStackTrace();
}
catch (IOException ie)
{
  ie.printStackTrace();
}
finally
{
  if (xtw != null)
  {
    try
    {
      xtw.close();
    }
    catch (XMLStreamException e)
    {
      e.printStackTrace();
    }
  }
}

Answer 2

这应该工作:

// ...
Writer writer = new OutputStreamWriter(new FileOutputStream(fileName), "UTF-8");
XMLStreamWriter xtw = xof.createXMLStreamWriter(writer);
xtw.writeStartDocument("UTF-8", "1.0");
// ...