01) jdk如果是1.8以上的,那么springframwork版本建议使用4.0以上的版本
HTTP Status 500 – Internal Server Error Type Exception Report Message An exception occurred processing JSP page [/dafei/header.jsp] at line [23] Description The server encountered an unexpected condition that prevented it from fulfilling the request. Exception org.apache.jasper.JasperException: An exception occurred processing JSP page [/dafei/header.jsp] at line [23] 20: <html xmlns="http://www.w3.org/1999/xhtml"> 21: <head> 22: <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 23: <title><%=newJcpeizhi.getJcpeizhiName()%></title> 24: <link rel="stylesheet" type="text/css" href="<%=basePath %>jquery-easyui-1.3.3/themes/default/easyui.css"> 25: <link rel="stylesheet" type="text/css" href="<%=basePath %>jquery-easyui-1.3.3/themes/icon.css"> 26: <script type="text/javascript" src="<%=basePath %>jquery-easyui-1.3.3/jquery.min.js"></script> Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:617) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:514) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) Root Cause java.lang.NullPointerException org.apache.jsp.dafei.index_jsp._jspService(index_jsp.java:384) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:476) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) Note The full stack trace of the root cause is available in the server logs. Apache Tomcat/8.5.39