linux下jni

创建java程序hello.java:

public class hello {

 

         static{
                   System.out.println(System.getProperty("java.library.path"));
                   System.loadLibrary("hello");
         }
 
         public hello(){
         }
 
         public native void sayHello(String name);

 

         public static void main(String argv[])

         {

                  hello interfaceHello = new hello();

                  interfaceHello.sayHello("FengXinZiYang");
        }

}

执行命令：

javac hello.java //生成hello.class

javah hello //生成jni文件 hello.h

 

创建cpp程序hello.cpp:

 

#include <iostream.h>
#include "hello.h"

JNIEXPORT void JNICALL Java_hello_sayHello
  (JNIEnv * env, jobject obj, jstring name)
{
 const char* pname = env->GetStringUTFChars(name, NULL);
     cout << "Hello, " << pname << endl;
}

 

生成.so文件：

g++ -I /usr/lib/jvm/java-1.5.0-sun-1.5.0.22/include/linux/ -I /usr/lib/jvm/java-1.5.0-sun-1.5.0.22/include/ -fPIC -c hello.cpp  //包含jdk路径，生成hello.o文件

g++ -shared -o libhello.so hello.o //生成.so文件

 

执行可执行程序，测试

javac hello.java

java hello

 

执行结果：Hello, FengXinZiYang

 

参考网页：

http://edu.codepub.com/2010/0804/24819.php