org.apache.jasper.JasperException错误

org.apache.jasper.JasperException: /WEB-INF/view/welcome.jsp(2,0) The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this applicationorg.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:39)org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:409)org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:90)org.apache.jasper.compiler.Parser.processIncludeDirective(Parser.java:339)org.apache.jasper.compiler.Parser.parseIncludeDirective(Parser.java:372)org.apache.jasper.compiler.Parser.parseDirective(Parser.java:475)org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)org.apache.jasper.compiler.Parser.parse(Parser.java:126)org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)javax.servlet.http.HttpServlet.service(HttpServlet.java:802)org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1047)org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:817)org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)javax.servlet.http.HttpServlet.service(HttpServlet.java:709)javax.servlet.http.HttpServlet.service(HttpServlet.java:802)org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)