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

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:

<?xml version="1.0" ?> <PSU>      <Major id="IST">         <name>Information Science and Technology</name>         <degree>B.S.</degree>         <option> Information Systems: Design and Development Option</option>         <requirements>             <firstlevel type="General_Education" credits="45">                 <component type="Writing_Speaking">GWS</component>                 <component type="Quantification">GQ</component> 

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.

Answer 1

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]", "");