Hi,
Im using JFreechart in my application. Im just using a simple cahrt 2 check. If it works fine then i wil b apple to develop mi entire application. But i face the following problem. I placed al the jar files of JFreechart in root/webinf/lib/ but then DefaultCategoryDataset is not being identified. Can anyone please guide me whats the problem is?
I hv enclosed the coding and the error with this mail.
<%@page contentType="text/html;charset=big5"%>
<%@page import="org.jfree.data.*"%>
<%@page import="org.jfree.chart.*"%>
<%@page import="java.io.*"%>
<FORM METHOD="POST" name="chartform" action="Chart.jsp">
<%
DefaultCategoryDataset myDataSet=new DefaultCategoryDataset();
myDataSet.setValue("apple",100);
myDataSet.setValue("pear",200);
myDataSet.setValue("grape",300);
myDataSet.setValue("bannana",400);
myDataSet.setValue("orange",500);
JFreeChart chart=ChartFactory.createPieChart3D("fruit production chart",myDataSet,true,true,true);
chart.setBackgroundPaint(java.awt.Color.white);
chart.setBorderVisible(false);
%>
<img src="servlet/showChart" border=0>
<Center><Input type="Submit" value="Generate..."/></Center>
</FORM>
</BODY>
</HTML>
-----------showChart code------------------
import java.io.*;
import javax.servlet.*;
import org.jfree.data.*;
import org.jfree.chart.*;
import javax.servlet.http.*;
import javax.servlet.*;
public class showChart extends HttpServlet
{
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
ChartRenderingInfo thisImageMapInfo=new ChartRenderingInfo();
HttpSession thisSession = request.getSession();
response.setContentType("image/jpeg");
JFreeChart thisChart=(JFreeChart)thisSession.getAttribute("chart");
ChartUtilities.writeChartAsJPEG(response.getOutputStream(),100,thisChart,400,300,thisImageMapInfo);
}
}
I have placed both the files in same folder. and complied the class. Is it enuf or whats the procedure to connect JSP and its correspondibg servlet.
----------------error--------------------------
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 15 in the jsp file: /Teresa/Chart.jsp
Generated servlet error:
DefaultCategoryDataset cannot be resolved or is not a type
An error occurred at line: 15 in the jsp file: /Teresa/Chart.jsp
Generated servlet error:
DefaultCategoryDataset cannot be resolved or is not a type
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
any help is appreciated...thanks in advance
Regards,
Carry.