Question

我是java开发人员，我想使用eclipse和cygwin gcc的本机方法，所以我阅读this link的说明

我跟踪了生成.class文件，.c文件，.h文件.dll文件的所有内容。

我还将hello.dll复制到了c：\ windows \ system32文件夹但该程序无法正常工作请帮帮我

    public class HelloJNI
    {
       static 
      {
    System.loadLibrary("hello");
      }

// Declare a native method sayHello() that receives nothing and returns void
private native void sayHello();

// Test Driver
public static void main(String[] args) {
    new HelloJNI().sayHello(); // invoke the native method
}
}

使用javah工具生成的.h文件是

#include <jni.h>
/* Header for class HelloJNI */

#ifndef _Included_HelloJNI
#define _Included_HelloJNI
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class:     HelloJNI
* Method:    sayHello
* Signature: ()V
*/
JNIEXPORT void JNICALL Java_HelloJNI_sayHello
(JNIEnv *, jobject);

#ifdef __cplusplus
}
#endif
#endif

我使用的make文件是

# Define a variable for classpath
CLASS_PATH = ../bin

# Define a virtual path for .class in the bin directory
vpath %.class $(CLASS_PATH)

all : hello.dll

# $@ matches the target, $< matches the first dependancy
hello.dll : HelloJNI.o
    gcc -Wl,--add-stdcall-alias -shared -o $@ $<

# $@ matches the target, $< matches the first dependancy
HelloJNI.o : HelloJNI.c HelloJNI.h
    gcc -I"C:\Program Files\Java\jdk1.7.0_51\include" -I"C:\Program Files\Java\jdk1.7.0_51\include\win32" -c $< -o $@

# $* matches the target filename without the extension
HelloJNI.h : HelloJNI.class
    javah -classpath $(CLASS_PATH) $*

clean :
    rm HelloJNI.h HelloJNI.o hello.dll

运行helloJNI示例或根本没有输出时出现致命错误

0 个答案: