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摘要: 学习JSP遇到的问题 ---标准标志库
我刚刚开始学习JSP ,最近看到了标准标志库这一节,问题还真的不少,在CSDN上发布了一下我的疑问,居然只有一个人回复。晕。
现在再说这两个问题吧:
我的环境是 Eclipse 3.1 + jdk1.5 + tomcat 5
1.xmlbuddy_
2.使用标准标志库后,总出现这样的问题JSP Parsing Error:The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application. 相同的两个JSP文件有的时候却没有这种问题 老外的一些网站说,这是TOMCAT的servlet-api.jar有和。。。的有冲突(好像是这个文件),事实上我觉得不像。我给大家看我的两个例子吧:
HTML PUBLIC "-//W
<%@ page contentType="text/html; charset=gb2312" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<head>
Good Morning!
Good Afternoon!
Good Evening!
</body>
这个文件没有任何问题。但是看下一:
HTML PUBLIC "-//W
<%@ 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/fmt" prefix="fmt" %>
<head>
Good Morning!
Good Afternoon!
Good Evening!
</body>
这个页面就会出现上面的问题.JSP Parsing Error:The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application.
3.关于标志库的XML部分。 页面代码如下:
<%@ 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" %>
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)
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)
晕。
google上关于这个的也很少。
独学真的很郁闷。