Java parsing XML document gives Content not allowed in prolog error

Question

I am writing a program in Java that takes a custom XML file and parses it  I m using the XML file for storage  I am getting the following error in Eclipse    Fatal Error   1 1  Content is not allowed in prolog  org xml sax SAXParseException  Content is not allowed in prolog      at com sun org apache xerces internal parsers DOMParser parse DOMParser java 239      at     com sun org apache xerces internal jaxp DocumentBuilderImpl parse DocumentBuilderImpl java 283        at javax xml parsers DocumentBuilder parse DocumentBuilder java 208      at me ericso psusoc RequirementSatisfier parseXML RequirementSatisfier java 61      at me ericso psusoc RequirementSatisfier getCourses RequirementSatisfier java 35      at     me ericso psusoc programs RequirementSatisfierProgram main RequirementSatisfierProgram java 23      The beginning of the XML file is included    lt  xml version  1 0    gt   lt PSU gt        lt Major id  IST  gt           lt name gt Information Science and Technology lt  name gt           lt degree gt B S  lt  degree gt           lt option gt  Information Systems  Design and Development Option lt  option gt           lt requirements gt               lt firstlevel type  General Education  credits  45  gt                   lt component type  Writing Speaking  gt GWS lt  component gt                   lt component type  Quantification  gt GQ lt  component gt    The program is able to read in the XML file but when I call DocumentBuilder parse XMLFile  to get a parsed org w3c dom Document  I get the error above   It doesn t seem to me that I have invalid content in the prolog of my XML file  I can t figure out what is wrong  Please help  Thanks

User · Answer

I think this is also a solution of this problem   Change your document type from  Encode in UTF-8  To  Encode in UTF-8 without BOM   I got resolved my problem by doing same changes

User · Answer

I assume you have proper xml encoding and matching with Schema    If you still get this error  check code that unmarshalls the xml and input type you have used  Because XML documents declare their own encoding  it is preferable to create a StreamSource object from an InputStream instead of from a Reader  so that XML processor can correctly handle the declared encoding  Ref Book  Java in A Nutshell    Hope this helps

User · Answer

You are not providing the correct address for the file  You need to provide an address such as C  Users xyz Desktop myfile xml

User · Answer

Make sure there s no hidden whitespace at the start of your XML file  Also maybe include  encoding  UTF-8   or 16  No clue  in the  node

User · Answer

Check any syntax problem in the XMl file  I ve found this error when working on xsl xsp with Cocoon and I define a variable using a non-existing node or something like that  Check the whole XML

User · Answer

The document looks fine to me but I suspect that it contains invisible characters  Open it in a hex editor to check that there really isn t anything before the very first   lt    Make sure the spaces in the XML header are spaces  Maybe delete the space before       Check which line breaks are used   Make sure the document is proper UTF-8  Some windows editors save the document as UTF-16  i e  every second byte is 0

User · Answer

If you re able to control the xml file  try adding a bit more information to the beginning of the file    lt  xml version  1 0  encoding  UTF-16  standalone  no   gt

User · Answer

Please check the xml file whether it has any junk character like this   If exists please use the following syntax to remove that   String XString   writer toString    XString   XString replaceAll      x20-  x7e

[java] Java parsing XML document gives "Content not allowed in prolog." error

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