如何使用JNA访问Java代码中的DLL方法？ [英] How to access DLL methods in Java code using JNA?

问题描述

通过运行 System.loadLibrary（myAPI），我验证了DLL文件myAPI.dll可以成功加载到我的Eclipse Java项目中。现在我需要从我的Java代码调用此DLL文件中指定的方法。为此，我将JNA添加到我的Java项目中。然后我写了下面给出的代码片段，应该能够获取类 IProject 和 ProjectFactory 的实例DLL文件）。

By running System.loadLibrary("myAPI"), I verified that the DLL file "myAPI.dll" can be successfully loaded into my Eclipse Java project. Now I need to call methods specified inside this DLL file from my Java code. To do this, I added JNA to my Java project. Then I wrote the below-given code snippet that should be able to get instances of classes IProject and ProjectFactory (specified in the DLL file).

我仍然不明白如何使用JNA正确实现。我检查了不同的线程，例如这一个，但我检查的那些提供答案。任何帮助是非常感谢。谢谢。

I still don't understand how to properly implement this with JNA. I checked different threads, e.g. this one, but the ones I checked don't provide an answer. Any help is highly appreciated. Thanks.

import com.sun.jna.Library;
import com.sun.jna.Native;   

public class MyClass {

public interface myAPI extends Library {
    //...
}

void LoadProj() {
    myAPI api = (myAPI) Native.loadLibrary("myAPI",myAPI.class);
    String fileName = "xxx.sp";


    IProject project; // this is wrong but shows what I am trying to do
    try {
        project = ProjectFactory.LoadProject(fileName);
    }
    catch (Exception ex) {
        MessageBox.Show(this, ex.Message, "Load failure");
    }
}
}

推荐答案

不知道你面临什么问题，但作为一个实践，你的myAPI界面应该用适当的参数映射。我的界面没有任何方法。

Not sure what problem you are facing but as a practice your myAPI interface should declare all the methods verbatim with appropriate parameter mapping. I don't see any methods inside your interface.

请检查此链接以及上述由@Perception提及的链接

Please checkout the this link as well as the link mentioned above by @Perception

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