El表达式使用问题——在eclipse tomcat发布项目后，页面跳转时报错HTTP Status 500

最新推荐文章于 2021-09-03 17:09:19 发布

原创最新推荐文章于 2021-09-03 17:09:19 发布 · 801 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#tomcat #500报错 #el表达式

环境部署专栏收录该内容

1 篇文章

订阅专栏

在Eclipse的Tomcat7环境中，遇到使用EL表达式时页面跳转出现HTTP Status 500错误，报错为javax.el.ELException。尝试了多种解决方法未果，最终通过升级Tomcat版本至Tomcat8成功解决问题。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

El表达式使用问题——在eclipse tomcat发布项目后，页面跳转时报错HTTP Status 500

报错javax.el.ELException: Failed to parse the expression

本机服务环境：win8+jdk1.7+tomcat7+eclipse Version: 2018-09 (4.9.0)
点击按钮进行跳转至购物车页面时出现下面的报错：

HTTP Status 500 – Internal Server Error

Type Exception Report

Message /WEB-INF/views/cart.jsp (line: 46, column: 20) "${Num = Num + cart.carPrice}" contains invalid expression(s): javax.el.ELException: Failed to parse the expression [${Num = Num + cart.carPrice}]

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.apache.jasper.JasperException: /WEB-INF/views/cart.jsp (line: 46, column: 20) "${Num = Num + cart.carPrice}" contains invalid expression(s): javax.el.ELException: Failed to parse the expression [${Num = Num + cart.carPrice}]
	org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
	org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:443)
	org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:199)
	org.apache.jasper.compiler.Validator$ValidateVisitor.getJspAttribute(Validator.java:1429)
	org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1236)
	org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:881)
	org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:900)
	org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:900)
	org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1553)
	org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2450)
	org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
	org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1845)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:218)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:374)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:354)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:341)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:660)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:378)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168)
	org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303)
	org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1282)
	org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1037)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:980)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

Note The full stack trace of the root cause is available in the server logs.