报错信息：
HTTP Status 500 – Internal Server Error Type Exception Report Message /WEB-INF/content/mainForm.jsp (line: 3, column: 62) File "/WEB-INF/c.tld" not found Description The server encountered an unexpected condition that prevented it from fulfilling the request. Exception org.apache.jasper.JasperException: /WEB-INF/content/mainForm.jsp (line: 3, column: 62) File "/WEB-INF/c.tld" not found 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:133) org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:168) org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:419) org.apache.jasper.compiler.Parser.parseDirective(Parser.java:484) org.apache.jasper.compiler.Parser.parseElements(Parser.java:1421) org.apache.jasper.compiler.Parser.parse(Parser.java:138) org.apache.jasper.compiler.ParserController.doParse(ParserController.java:242) org.apache.jasper.compiler.ParserController.parse(ParserController.java:102) org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:199) 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:395) 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:1244) org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027) org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971) org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) 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) Note The full stack trace of the root cause is available in the server logs. Apache Tomcat/7.0.92
错误原因分析：在使用jstl中c标签库时，在web.xml文件中配置了taglib
解决方法：在配置文件中删除该项配置即可