jni tut

Compile HelloWorld.java
javac HelloWorld.java
Generate HelloWorld.h
javah HelloWorld

#include <jni.h>
#include "HelloWorld.h"
#include <stdio.h>

JNIEXPORT void JNICALL
Java_HelloWorld_displayHelloWorld(JNIEnv *env, jobject obj)
{
    printf("Hello world!\n");
    return;
}

编译的时候，include , " Java_home/include ; Java_home/include/win32"
编译选项：env.MergeFlags('-Wl,--kill-a') 。
把 .dll 拷贝到 .class 目录，
java HelloWorld

JNI_CreateJavaVM

int JniInit::createJvm(JavaVM **jvm, JNIEnv **env,
             char *classpath,char * jvmOptions){


      JavaVMInitArgs vm_args;
        JavaVMOption options[2];
        options[0].optionString = classpath;
        options[1].optionString = jvmOptions;
        vm_args.version = JNI_VERSION_1_2;
        vm_args.options = options;
        vm_args.nOptions = 2;
        //vm_args.ignoreUnrecognized = JNI_TRUE;

       int ret=JNI_CreateJavaVM(jvm, (void**)env, &vm_args);
       return ret;




}

把 :C:\Program Files\Java\jdk1.6.0_11\jre\bin\client) 加到path.
include:C:\Program Files\Java\jdk1.6.0_11\include\
link: C:\Program Files\Java\jdk1.6.0_11\lib\jvm.lib