我想在netbeans中读取一个xml文件.我使用这段代码:
DocumentBuilderFactory dbf ; DocumentBuilder db; Document doc = null;
  File file = new File(xml_url);
  dbf = DocumentBuilderFactory.newInstance();
  db = dbf.newDocumentBuilder();
  doc = db.parse(file);
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然后它给出了这个错误: Byte "239" is not a member of the (7-bit) ASCII character set.
xml标题是:
<?xml version="1.0" encoding="us-ascii"?>
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我怎样才能解决这个问题?谢谢.