jsp页面设置charset的问题

老郭

redhat ads3+oracle9i
tomcat4.17+jdk1.4
jsp页面中设置
<%@ page contentType="text/html; charset=gb2312" %>提示
javax.servlet.ServletException: sun.io.ByteToCharEUC_CN.getIndex1()[S
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:249)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter

(ApplicationFilterChain.java:247)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter

(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.StandardWrapperValve.invoke

(StandardWrapperValve.java:260)
这样错误好像是说jdk找不到gb字符包，
<%@ page contentType="text/html; charset=8859-1" %>这样设置时一切正常
不知道是什么原因？？是需要在系统中再安装语言包吗?还是在其它设置中作配置？我在另外一台机器上redhat ad2+oracle8i相同配置，一切都好使，不知道为什么！