Issue

This Content is from Stack Overflow. Question asked by Jitendra Kurmi

Project works well on localhost with tomcat 8.0, 9.0 but when i deployed it to server using .war file , the index.jsp page unable to find the class method and gives error
My java class file FunUtils.java

package com.demojsp.net;

public class FunUtils {
    public static String makeItLower(String data)
    {
        return data.toLowerCase();
    }

}

My jsp Page index.jsp

<%@page import="com.demojsp.net.*"%>
<html>
<body>
Let's have some fun<%=FunUtils.makeItLower("JITENDRA KURMI") %>
</body>
</html>

Error which i received on live server

type Exception report

message An exception occurred processing JSP page /index.jsp at line 4

description The server encountered an internal error that prevented it from fulfilling this request.
org.apache.jasper.JasperException: An exception occurred processing JSP page /index.jsp at line 4

1: <%@page import="com.demojsp.net.*"%>
2: <html>
3: <body>
4: Let's have some fun<%=FunUtils.makeItLower("JITENDRA KURMI") %>
5: </body>
6: </html>


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:579)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:461)
    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)
root cause

javax.servlet.ServletException: java.lang.UnsupportedClassVersionError: com/demojsp/net/FunUtils
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:909)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:838)
    org.apache.jsp.index_jsp._jspService(index_jsp.java:130)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    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)
root cause

java.lang.UnsupportedClassVersionError: com/demojsp/net/FunUtils
    org.apache.jsp.index_jsp._jspService(index_jsp.java:115)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    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/8.0.48 logs.

Solution

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