使用 jni 的 java.lang.UnsatisfiedLinkError

Question

class HelloWorld {
    public native void print();  //native method
    static   //static initializer code
    {
        try{
            String path = System.getProperty("java.library.path");
            System.out.println(path);
        System.loadLibrary("CLibHelloWorld1");
        //System.load("C:/TE_CDA_Project/Test/native/CLibHelloWorld1.dll");
        //Runtime.getRuntime().load("C:/TE_CDA_Project/Test/native/CLibHelloWorld1.dll");

    System.out.println("Loaded CallApi");
    }catch(UnsatisfiedLinkError e){
        e.printStackTrace();
    }
}

public static void main(String[] args)
{
    HelloWorld hw = new HelloWorld();

    hw.print();


}

}

输出:

C:\TE_CDA_Project\Test\native
Loaded CallApi
Exception in thread "main" java.lang.UnsatisfiedLinkError: Graph.HelloWorld.print()V
    at Graph.HelloWorld.print(Native Method)
    at Graph.HelloWorld.main(HelloWorld.java:26)

Answer 1

将此添加到您的 C 编译器中，它对我有用的附加选项:

   -Wl,--export-all-symbols -Wl,--add-stdcall-alias