学习JSP遇到的问题 ---标准标志库(3)

<%@ page contentType="text/html; charset=gb2312" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/xml" prefix="x" %>

<c:import var="rssFeed" url="/jstlTest/book.xml"/>
<x:parse var="rss" xml="${rssFeed}"/>
<x:set select="$book/book/title" var="rss" scope="session" />
<b><x:out select="$rss"/></b><br>

出错:Content is not allowed in prolog.

javax.servlet.ServletException: javax.servlet.jsp.JspException: Content is not allowed in prolog.

        org.apache.jASPer.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:844)

        org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)

        org.apache.jsp.isJSTLxml_jsp._jspService(org.apache.jsp.isJSTLxml_jsp:91)

        org.apache.jasper.runtime.HttpJsPBase.service(HttpJspBase.java:97)

        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)

        org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)

        org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)

        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

org.xml.sax.SAXParseException: Content is not allowed in prolog.

        com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)

        com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)

        org.apache.taglibs.standard.tag.common.xml.ParseSupport.parseInputSource(ParseSupport.java:227)

        org.apache.taglibs.standard.tag.common.xml.ParseSupport.parseInputSourceWithFilter(ParseSupport.java:193)

        org.apache.taglibs.standard.tag.common.xml.ParseSupport.parseReaderWithFilter(ParseSupport.java:199)

        org.apache.taglibs.standard.tag.common.xml.ParseSupport.parseStringWithFilter(ParseSupport.java:206)

        org.apache.taglibs.standard.tag.common.xml.ParseSupport.doEndTag(ParseSupport.java:138)

        org.apache.jsp.isJSTLxml_jsp._jspx_meth_x_parse_0(org.apache.jsp.isJSTLxml_jsp:135)

        org.apache.jsp.isJSTLxml_jsp._jspService(org.apache.jsp.isJSTLxml_jsp:74)

        org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)

        javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

        org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)

        
			   
			   

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