关于linux下，tomcat应用中，利用jasper导出报表的错误！
我原来的系统跑在HP-UX下，完全没问题，然后我把tomcat目录和应用程序目录拷贝到了一个linux下，运行正常，但就是以前的导出excel和pdf文件的方法报错。如下：
HTTP Status 500 -
--------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet execution threw an exception
com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
com.cnc.oss.ttms.TtmsFilter.doFilter(TtmsFilter.java:21)
root cause
java.lang.NoClassDefFoundError
sun.java2d.SunGraphicsEnvironment$1.run(SunGraphicsEnvironment.java:108)
java.security.AccessController.doPrivileged(Native Method)
sun.java2d.SunGraphicsEnvironment. <init> (SunGraphicsEnvironment.java:78)
sun.awt.X11GraphicsEnvironment. <init> (X11GraphicsEnvironment.java:150)
sun.reflect.GeneratedConstructorAccessor202.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance(Constructor.java:274)
java.lang.Class.newInstance0(Class.java:306)
java.lang.Class.newInstance(Class.java:259)
java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:62)
net.sf.jasperreports.engine.util.JRGraphEnvInitializer.initializeGraphEnv(JRGraphEnvInitializer.java:58)
net.sf.jasperreports.engine.fill.JRBaseFiller. <init> (JRBaseFiller.java:182)
net.sf.jasperreports.engine.fill.JRVerticalFiller. <init> (JRVerticalFiller.java:82)
net.sf.jasperreports.engine.fill.JRVerticalFiller. <init> (JRVerticalFiller.java:74)
net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:107)
net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:428)
com.cnc.oss.ttms.search.MyJasper.doExecute(MyJasper.java:132)
com.opensymphony.webwork.dispatcher.WebWorkResultSupport.execute(WebWorkResultSupport.java:109)
com.opensymphony.xwork.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:258)
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:182)
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:164)
com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)
com.opensymphony.webwork.dispatcher.ServletDispatcher.serviceAction(ServletDispatcher.java:272)
com.opensymphony.webwork.dispatcher.ServletDispatcher.service(ServletDispatcher.java:237)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
com.cnc.oss.ttms.TtmsFilter.doFilter(TtmsFilter.java:21)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
我查资料说可能和X有关，我启动tomcat必须通过telnet命令行方式，因为机器在远程，我在命令行下敲startx，提示如下：
[root@ttms-webserver1 upload]# startx
Fatal server error:
Server is already active for display 0
If this server is no longer running, remove /tmp/.X0-lock
and start again.
Please consult the The X.Org Foundation support
at http://wiki.X.Org
for help.
Xlib: connection to ":0.0 " refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key
giving up.
xinit: unable to connect to X server
xinit: No such process (errno 3): Server error.
不知道该如何解决，请指教，在线等！
[解决办法]
telnet里启动图形界面我不知道可不可以
至于这个报错java.lang.NoClassDefFoundError，我认为可能是权限不够
用chmod先改成777看看 - - "
[解决办法]
1.估计你的tomcat的版本不对，重新下载一个for linux的试试
2.至于这个报错java.lang.NoClassDefFoundError有可能是你的jdk的相关配置不正确，或是版本不对
[解决办法]
对LINUX不熟，学习．标记一下
[解决办法]
http://www.finereport.com
[解决办法]
，学习．标记一下
[解决办法]
gz版本tomcat是在LINUX下使用的版本
跨平台移值应该没有问题的，我用都没问题，注意TOMCAT的版本
[解决办法]
关注。
版本搞错了
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.myexception.cn/java-web/317.html
