JNI HelloJava

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一，编写HelloJava.java, 声明一个native method

package com;public class HelloJava {private native void print();public static void main(String args[]) {new HelloJava().print();}static {System.loadLibrary("HelloJava");}}

二，进入"src/"目录，执行javac com/HelloJava.java,生成HelloJava.class

三，执行"javah -jni com.HelloJava 生成com_HelloJava.h

/* DO NOT EDIT THIS FILE - it is machine generated */#include <jni.h>/* Header for class com_HelloJava */#ifndef _Included_com_HelloJava#define _Included_com_HelloJava#ifdef __cplusplusextern "C" {#endif/* * Class: com_HelloJava * Method: print * Signature: ()V */JNIEXPORT void JNICALL Java_com_HelloJava_print (JNIEnv *, jobject);#ifdef __cplusplus}#endif#endif

三，编写HelloJava.c

#include <jni.h>#include <stdio.h>#include "com_HelloJava.h"JNIEXPORT void JNICALL Java_com_HelloJava_print (JNIEnv *env, jobject obj) { printf("hello java!"); return;}

四，执行 cl -Ic:/java/include -Ic:/java/include/win32 -MD -LD HelloJava.c -FeHelloJava.dll

生成HelloJava.dll

五，执行java com.HelloJava

成功显示hello java! 若执行失败，显示RutimeError R6034则这是vc的问题。

需要执行mt.exe -manifest HelloWorld.dll.manifest -outputresource:HelloWorld.dll;2

详见：http://msdn.microsoft.com/zh-cn/library/ms235591(VS.80).aspx

http://blog.sina.com.cn/s/blog_70584b480100lj5i.html