悄无声息是什么意思啊:谁能看看程序是有什么问题啊 谢谢！

restAdmin.jsp文件 我在TOMCAT中运行下面这个文件后。

出现了这个错误提示： 我在JSP中找不到错误 下面是什么意思？

HTTP Status 500 -

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type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: String index out of range: 12
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

root cause

java.lang.StringIndexOutOfBoundsException: String index out of range: 12
java.lang.String.substring(String.java:1441)
org.apache.jsp.DSN.xiu.restAdmin_jsp._jspService(restAdmin_jsp.java:106)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

note The full stack trace of the root cause is available in the Tomcat logs.

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Apache Tomcat/5.0.19