JNI

JNI——Java Native Interface

新建java工程，使用eclipse

package jnitest;

public class JniTest {
	static{
		System.loadLibrary("xmjni");
	}
	
	public native void printHello();

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("hello word.");
		new JniTest().printHello();
	}

}

进入src目录，编译
javac JniTest.java

生成头文件
javah -jni jnitest.Jnitest

编写.cpp文件

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

JNIEXPORT void JNICALL Java_jnitest_JniTest_printHello
  (JNIEnv *, jobject){
	printf("hello, i am jni, i am succeed.\n");
  }

生成dll
gcc -shared -o xmjni.dll jnitest_JniTest.cpp

拷贝dll到工程根目录下，eclipse，run
hello word.
hello, i am jni, i am succeed.