使用JNA访问包含多个类的DLL方法 [英] Accessing DLL methods with contain mulitple classes using JNA

问题描述

我很喜欢使用JNA从Java访问DLL，所以请原谅我，如果这对每个人都是显而易见的！我需要从DLL中的类访问方法（这是用VB编写的），只有加载库时，我才能看到如何访问它中的类。该DLL称为CDrawControl.dll，但我需要访问的DLL中的类是DrawCtl。所以我需要获取一个DrawCtl类的实例。
那么总而言之，如何使用JNA在DLL中达到这个方法？

CDrawControl.DrawCtl.SaveFile（）

这可能是一件非常简单的事，我错过了。

  public class ReadDLL {
 public interface ChemDrawCtl12 extends Library {
 CDrawControl INSTANCE =（CDrawControl）Native.loadLibrary（
（Platform.isWindows ）？CDrawControl：CDrawCtl12LinuxPort），
 CDrawControl.class）; 
 
 void DrawCtl.SaveAs（）; //这是错误的，但显示我正在努力做什么！ 
} 
  

解决方案

您最有可能需要使用一个COM包装，尝试JACOB或com4j。这些项目可以扫描接口定义文件并生成相应的Java对象。

I am new to accessing DLLs from Java using JNA,so forgive me if this is obvious to everyone! I need to access methods from a class within a DLL(which was written in VB) and cannot do this by just loading the library as I see how to access a class within it I.e. the DLL is called CDrawControl.dll, but the class within the DLL I need to access is DrawCtl. So I need to get an instance of the DrawCtl class. So all in all, how to I reach this method in the DLL using JNA?

I.e. CDrawControl.DrawCtl.SaveFile()

It is probably something very simple I am missing.

public class ReadDLL {
    public interface ChemDrawCtl12 extends Library {
    CDrawControl INSTANCE = (CDrawControl) Native.loadLibrary(
            (Platform.isWindows() ? "CDrawControl" : "CDrawCtl12LinuxPort"),
            CDrawControl.class);

    void DrawCtl.SaveAs(); // this is wrong but shows what I am trying to do!!
}

解决方案

You most likely need to use a COM wrapper, try JACOB or com4j. Those projects can scan an interface definition file and generate corresponding Java objects.

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