java调用dll 动态链接库(dll)初始化例程失败._线程“main”中的异常java.lang.UnsatisfiedLinkError：动态链接库(DLL)初始化例程失败…

这是一个非常有趣的问题。在本机代码打印它的一些语句后，我得到了提到的异常。抛出的异常是：

hookThreadHandle is not NULL

hookThreadHandle is not NULL

Exception in thread “main” java.lang.UnsatisfiedLinkError: W:\elita\jnitesters\

workspace\c\MyHook\bin\Debug\MyHook.dll: A dynamic link library (DLL) initialization r

outine failed

at java.lang.ClassLoader$NativeLibrary.load(Native Method)

at java.lang.ClassLoader.loadLibrary0(Unknown Source)

at java.lang.ClassLoader.loadLibrary(Unknown Source)

at java.lang.Runtime.loadLibrary0(Unknown Source)

at java.lang.System.loadLibrary(Unknown Source)

at keylogger.TestKeys.main(TestKeys.java:12)前两条语句hookThreadHandle is not NULL是dll的初始化失败的语句！为什么在找到dll并打印语句后抛出异常。 ？

什么是A dynamic link library (DLL) initialization routine failed异常？它意味着什么？

Java代码：

package keylogger;

public class TestKeys {

private static int i = 0;

private native void setWinHook();

private native void unregisterWinHook();

public static void main(String args[]) {

//TestKeys o = new TestKeys();

System.loadLibrary(“MyHook”); // load the library that registers the hook

Runnable r = new Runnable() {

@Override

public void run() {

try {

System.out.println(“Sleeping for 10 seconds..”);

Thread.sleep(10000);

}catch(Exception exc) {

exc.printStackTrace();

}

}

};

new Thread(r,”new thread”).start();

}

}C代码：

#include

#include

#include

#include “keylogger_TestKeys.h”

static HHOOK handleKeyboardHook = NULL;

HINSTANCE hInst = NULL;

static DWORD hookThreadId = 0;

static HANDLE hookThreadHandle = NULL;

BOOL WINAPI installHook(HINSTANCE hinstDLL, DWORD fwdReason, LPVOID lpvReserved);

static LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) {

printf(“You pressed the key !\n”);

return CallNextHookEx(handleKeyboardHook, nCode, wParam, lParam);

}

BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fwdReason, LPVOID lpvReserved) {

LPTHREAD_START_ROUTINE lpStartAddress = &installHook;

hookThreadHandle = CreateThread(NULL, 0, lpStartAddress, NULL, 0, &hookThreadId);

if(hookThreadHandle == NULL) {

printf(“\nhookThreadHandle is NULL\n”);

} else {

printf(“\nhookThreadHandle is not NULL\n”);

}

}

JNIEXPORT void JNICALL Java_keylogger_TestKeys_unregisterWinHook

(JNIEnv *env, jobject obj) {

if(handleKeyboardHook != NULL) {

UnhookWindowsHookEx(handleKeyboardHook);

printf(“Keyboard hook successfully unregistered !”);

} else {

printf(“Coudn’t Unhook the keyboard hook !”);

}

}

BOOL WINAPI installHook(HINSTANCE hinstDLL, DWORD fwdReason, LPVOID lpvReserved) {

handleKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, LowLevelKeyboardProc, hinstDLL, 0);

MSG msg;

while(GetMessage(&msg, NULL, 0, 0))

{

TranslateMessage(&msg);

DispatchMessage(&msg);

}

return msg.wParam;}

可能是什么原因 ？ Output on the CMD