linux下itext来导出doc文档报错

[zpc10]

项目（jdk1.4+weblogic+oracle10g)中用到itext-1.3.1.jar来导出doc文档，在windows环境下ok，换到linux环境报错：
Error in findNextPage method of the PageHandle class :null
######### End ########
javax.servlet.ServletException
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:532)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.peak.app.base.EncodeFilter.doFilter(EncodeFilter.java:18)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:334)
at com.peak.util.control.PageHandle.findNextPage(PageHandle.java:64)
at com.peak.app.evaluation.Evaluation.execute(Evaluation.java:128)
at com.peak.util.control.PageServlet.processRequest(PageServlet.java:94)
at com.peak.util.control.PageServlet.doPost(PageServlet.java:183)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1077)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:28)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at com.peak.app.base.EncodeFilter.doFilter(EncodeFilter.java:18)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:7053)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3902)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2773)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)

调试发现，出错语句是：RtfWriter.getInstance(document, new FileOutputStream(docPath));

换了itext-2.0.4.zip，报同样错误！

哪位能够帮忙？
多谢！

[zpc10]

自己解决
因为是输出doc，考虑是否系统中没有启动对图形化的支持；
调试发现打印new Color(0,0,0)报错；
于是采取措施： 1.编辑startWebLogic.sh，增加启动jdk的参数-Djava.awt.headless=true
2.在usr/lib中查看是否有类似libXP的文件，找到libXmu.so.6，复制一份，并重命名为libXP.so.6
3.在etc/ld.so.conf.d/下建xorg-x11-deprecated-libs.conf文件,其中包含一行文字"/usr/lib"
4.执行cat xorg-x11-deprecated-libs.conf
5.执行/sbin/ldconfig
6.重试服务：OK

*********
关于/etc/ld.so.conf:
这个文件记录了编译时使用的动态链接库的路径。
ldconfig通常位于/sbin下，它将/etc/ld.so.conf列出的路径下的库文件缓存到/etc/ld.so.cache 以供使用