How to link javabean with c using jni

I am doing a program about using jni to load a c .But when I was using jni with javabean, under tomcat, it didn't work . Please show me a way.
my code�F
/////TestJNI.java
package com.jsp;
public class TestJNI{
private byte[] cbuff={49,48,48,48,100,0x0};
public byte getchar(int i)
return cbuff;
public native int GetRandom(byte[] pRandom,int j);
static
System.loadLibrary( "TestJNI" );
public void Execute()
int r=GetRandom(cbuff,4);
/////BeanTest.jsp
<jsp:useBean id="TestJNI" scope="session" class="com.jsp.TestJNI">
</jsp:useBean>
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<%=TestJNI.getchar(4)%>;
<%
TestJNI.Execute();
%>
<br>
<%=TestJNI.getchar(4)%>
</body>
</html>
//////TestJNI.cpp
//TestJNI.cpp
#include"com_jsp_TestJNI.h"
#include<stdio.h>
JNIEXPORT jint JNICALL Java_com_jsp_TestJNI_GetRandom (JNIEnv *env, jclass, jbyteArray pRandom, jint j)
jsize size = env->GetArrayLength((jarray)pRandom);
jbyte *arrayBody    = (env)->GetByteArrayElements(pRandom,NULL);
jbyte buff[5];
buff[0]=31;
buff[1]=32;
buff[2]=33;
buff[3]=34;
buff[4]=35;
env->SetByteArrayRegion(pRandom,0,5,buff); // set byte[] values
return (jint)100;
I put TestJNI.class under directory com/jsp/�Cput TestJNI.dll under classes directory�B
erro information�F
java.lang.NoClassDefFoundError
     sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     java.lang.reflect.Constructor.newInstance(Constructor.java:274)
     java.lang.Class.newInstance0(Class.java:308)
     java.lang.Class.newInstance(Class.java:261)
     java.beans.Beans.instantiate(Beans.java:204)
     java.beans.Beans.instantiate(Beans.java:48)
     org.apache.jsp.beantest_jsp._jspService(beantest_jsp.java:45)
     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)

You can test a normal Class(not a JNI call) invoking in BeanTest.jsp
1.If there is no problem it's most likely you can't get library path set in server enviroment
(here: System.loadLibrary( "TestJNI" ); )
2.If the same exception occurs ,you should check your webapps tree structure.
please refer to the 2 links if you can read chinese
http://www.chinaitlab.com/www/news/article_show.asp?id=36677
http://www.javaresearch.org/article/showarticle.jsp?column=1&thread=4653

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