在weblogic中运行web项目，jsp中的标签导入出错，需要导入什么包啊！！！很急啊

<2011-8-3 下午04时58分07秒 CST> <Error> <HTTP> <BEA-101017> <[ServletContext@323
94686[app:_appsdir_ziyan_dir module:ziyan path:/ziyan spec-version:2.5], request
: weblogic.servlet.internal.ServletRequestImpl@16a5c7c[
GET /ziyan/Web_NewsOperate.do?method=showNews HTTP/1.1
Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave
-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msw
ord, */*
Referer: http://192.168.1.59:7001/ziyan/
Accept-Language: zh-cn
User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Info
Path.2; .NET CLR 2.0.50727)
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
Cookie: JSESSIONID=2A7067D24D2087CBA97FFC502798636B; JSESSIONID=ggT2T5MD6GNdLTts
ldyCBGGzs6b47qnn215JZjGm9CfHK6vnxJ8y!526463244; cnzz_a2686601=12; sin2686601=; r
time=0; ltime=1312361882562; cnzz_eid=39342830-1312358477-]] Root cause of ServletException.
weblogic.servlet.jsp.CompilationException: Failed to compile JSP /newxitong/web_
shownews.jsp
web_shownews.jsp:4:4: No tag library could be found with this URI. Possible caus
es could be that the URI is incorrect, or that there were errors during parsing
of the .tld file.
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   ^----^
web_shownews.jsp:4:4: No tag library could be found with this URI. Possible caus
es could be that the URI is incorrect, or that there were errors during parsing
of the .tld file.
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   ^----^        at weblogic.servlet.jsp.JavelinxJSPStub.reportCompilationErrorIfNeccessa
ry(JavelinxJSPStub.java:221)
        at weblogic.servlet.jsp.JavelinxJSPStub.compilePage(JavelinxJSPStub.java
:157)
        at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:246)
        at weblogic.servlet.jsp.JspStub.prepareServlet(JspStub.java:191)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.jav
a:235)
        Truncated. see log file for complete stacktrace
>