jspµ÷ÓÃjni·½·¨
ÎҵĻ·¾³:
--------
1. java±àÒëÆ÷:eclipse 3.0.2
2. web·þÎñÆ÷: tomcat 4.1.24
3. C±àÒëÆ÷: VC6.0
4. ²Ù×÷ϵͳ: win2k
5. javaÔ´ÎļþĿ¼: d:\study\src
6. java±àÒëºóµÄclassÎļþĿ¼: d:\study\bin
7. tomcatĿ¼: d:\tomcat41
1.±àдjavaÎļþ:
//Util.java
package com.jni;
public class Util
{
public native static int add( int x, int y );
static
{
System.loadLibrary( "Util" );
}
}
±àÒëÕâ¸öÎļþ,Éú³ÉUtil.classÎļþ.
2.Éú³É¶ÔÓ¦µÄÍ·Îļþ:
´ò¿ªÒ»¸ödos´°¿Ú,½øÈë´æ·ÅclassÎļþµÄĿ¼:
d:\>cd d:\study\bin
d:\study\bin\>javah com.jni.Util
ÕâÑù,»áÔÚd:\study\binĿ¼ÏÂÉú³Écom_jni_Util.hÎļþ.
3. ±àдcÎļþ:
ÔÚVC6.0ÖÐ:File->New->Projects->Win32 Dynamic-link Library,Project name ΪUtil, ´´½¨Ò»¸öempty DLL project.
°Ñ2ËùÉú³ÉµÄcom_jni_Util.hÎļþºÍC:\j2sdk1.4.2\includeĿ¼ÏµÄjni.h, C:\j2sdk1.4.2\include\win32Ŀ¼ÏµÄjni_md.h¸´ÖƵ½Util¹¤³ÌĿ¼ÏÂ.
(C:\j2sdk1.4.2ΪÎÒµÄjsdkµÄ°²×°Â·¾¶).
ÔÚUtil¹¤³ÌÖд´½¨Ò»¸öcÔ´Îļþ,ÃûΪUtil.c.
//Util.c
#include "com_jni_Util.h"
JNIEXPORT jint JNICALL Java_com_jni_Util_add
(JNIEnv *env, jclass jc, jint x, jint y)
{
return x+y;
}
4. Éú³ÉUtil.dll:
±àÒë3ÖеÄUtil.cÎļþºó,»áÉú³ÉUtil.dllÎļþ.
5. Éú³Éjar°ü:
°ÑUtil.classÎļþ´ò³Éjar°ü,ÃûΪmyutil.jar.
6. ±àдjspÎļþ:
//test.jsp
<%@ page import="com.jni.Util" %>
<html>
<head></head>
<body>
<h3>5+7=<%=Util.add( 5, 7 )%></h3>
</body>
</html>
7. °Ñmyutil.jar°ü¸´ÖƵ½d:\tomcat41\common\libĿ¼ÏÂ;
°ÑUtil.dllÎļþ¸´ÖƵ½d:\tomcat41\binĿ¼ÏÂ(Ò²¿ÉÒÔÊÇ»·¾³±äÁ¿pathµÄËùÉ趨µÄÈκÎÒ»¸öĿ¼ÏÂ);
°Ñtest.jsp¸´ÖƵ½d:\tomcat41\webapp\testĿ¼ÏÂ.
8. Æô¶¯tomcat.
9. ÔÚieÖÐÊäÈë: http://localhost:8080/test/test.jsp.
Èç¹ûÄãÄÜ¿´µ½: 5+7=12 ¾Í³É¹¦ÁË.
Ïà¹ØÎĵµ£º
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objdbConn.Open(strdsn);
// ......
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<%@ page language="java" contentType="text/html; charset=GBK" %>
<%!
String getCh(String s) {
try {
String &nb ......