JAVA JNI原理详细介绍及简单实例代码

 /**
  * 
  */
  package com.magc.jni;
 
  /**
  * @author magc
  *
  */
 public class HelloWorld {
   
   static {
     
     System.loadLibrary("Hello");
     
   }
 
   public   native void DisplayHello();
   /**
   * @param args
   */
   public static void main(String[] args) {
 
     new HelloWorld().DisplayHello();
   }
 
 }

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

#include <jni.h>
#include "com_magc_jni_HelloWorld.h"
#include <stdio.h>
JNIEXPORT void JNICALL Java_com_magc_jni_HelloWorld_DisplayHello
(JNIEnv *env, jobject obj)
{
  printf("From jni_helloworldImpl.cpp :");
  printf("Hello world ! \n");
  return;
}