紧急求救,高手指点

[hgxha]

此为一画图的程序，传参数是正确地，
就是画图时出错
执行时提示错误如下
使用曲线图
Error: 500
Location: /reports/2/success.jsp
Internal Servlet Error:

javax.servlet.ServletException: sun/awt/X11GraphicsEnvironment
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.(Compiled Code)
at java.lang.Exception.(Compiled Code)
at javax.servlet.ServletException.(Compiled Code)
at org.apache.jasper.servlet.JspServlet.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.doService(Compiled Code)
at org.apache.tomcat.core.Handler.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.service(Compiled Code)
at org.apache.tomcat.facade.RequestDispatcherImpl.forward(Compiled Code)
at org.apache.jasper.runtime.PageContextImpl.forward(Compiled Code)
at reports._00032._0002freports_0002f_00032_0002fquery_0002ejspquery_jsp_1._jspService(Compiled Code)
at org.apache.jasper.runtime.HttpJspBase.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(Compiled Code)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(Compiled Code)
at org.apache.jasper.servlet.JspServlet.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.doService(Compiled Code)
at org.apache.tomcat.core.Handler.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.service(Compiled Code)
at org.apache.tomcat.core.ContextManager.internalService(Compiled Code)
at org.apache.tomcat.core.ContextManager.service(Compiled Code)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(Compiled Code)
at org.apache.tomcat.service.TcpWorkerThread.runIt(Compiled Code)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(Compiled Code)
at java.lang.Thread.run(Compiled Code)

Root cause:
java.lang.NoClassDefFoundError: sun/awt/X11GraphicsEnvironment
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName0(Compiled Code)
at java.lang.Class.forName(Compiled Code)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Compiled Code)
at java.awt.image.BufferedImage.createGraphics(Compiled Code)
at java.awt.image.BufferedImage.getGraphics(Compiled Code)
at ssr.ssrChartBean.doChart(Compiled Code)
at reports._00032._0002freports_0002f_00032_0002fsuccess_0002ejspsuccess_jsp_8._jspService(Compiled Code)
at org.apache.jasper.runtime.HttpJspBase.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(Compiled Code)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(Compiled Code)
at org.apache.jasper.servlet.JspServlet.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.doService(Compiled Code)
at org.apache.tomcat.core.Handler.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.service(Compiled Code)
at org.apache.tomcat.facade.RequestDispatcherImpl.forward(Compiled Code)
at org.apache.jasper.runtime.PageContextImpl.forward(Compiled Code)
at reports._00032._0002freports_0002f_00032_0002fquery_0002ejspquery_jsp_1._jspService(Compiled Code)
at org.apache.jasper.runtime.HttpJspBase.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(Compiled Code)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(Compiled Code)
at org.apache.jasper.servlet.JspServlet.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.doService(Compiled Code)
at org.apache.tomcat.core.Handler.service(Compiled Code)
at org.apache.tomcat.core.ServletWrapper.service(Compiled Code)
at org.apache.tomcat.core.ContextManager.internalService(Compiled Code)
at org.apache.tomcat.core.ContextManager.service(Compiled Code)
at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(Compiled Code)
at org.apache.tomcat.service.TcpWorkerThread.runIt(Compiled Code)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(Compiled Code)
at java.lang.Thread.run(Compiled Code)
以下是程序的头部分
package ssr;

import java.util.*;
import java.io.*;
import com.sun.image.codec.jpeg.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.awt.font.*;
import java.awt.*;
import java.awt.image.*;
import java.lang.Math.*;