HTTP Status 500 - /jsp/product-list.jsp (line: 3, column: 1) Taglib directive: Mandatory attribute prefix missing
type Exception report
message /jsp/product-list.jsp (line: 3, column: 1) Taglib directive: Mandatory attribute prefix missing
description The server encountered an internal error that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /jsp/product-list.jsp (line: 3, column: 1) Taglib directive: Mandatory attribute prefix missing
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:41)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:275)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:91)
org.apache.jasper.compiler.JspUtil.checkAttributes(JspUtil.java:177)
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:542)
org.apache.jasper.compiler.Node$TaglibDirective.accept(Node.java:651)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
org.apache.jasper.compiler.Node$Root.accept(Node.java:464)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1853)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:217)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:336)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:323)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:363)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.36 logs.
jsp标签错了，缺少前缀，你可以把代码贴出来！
是不是写jsp的时候用到了jstl标签库，但是你没有使用taglib定义标签库和前缀。
类似于<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
表示看不懂，太多了～～～