在Java程序中调用C#方法 [英] Calling C# method within a Java program
问题描述
C#方法不能直接在Java中使用JNI由于不同的原因调用。所以首先我们必须编写使用C ++,然后创建DLL和在Java中使用它通过JNI的C#的包装。
C# methods cannot be called directly in Java using JNI due to different reasons. So first we have to write a wrapper for C# using C++ then create the dll and use it through JNI in Java.
我在调用C#代码用C有问题++。我添加C# .netmodule
文件到C ++项目。代码如下粘贴。请指引我,如果我做错什么
I have problem in calling C# code in C++. I'm adding C# .netmodule
file to a C++ project. Code is pasted below. Please guide me if i'm doing anything wrong.
这是我的托管C ++类 UsbSerialNum.h
:
This is my managed C++ class UsbSerialNum.h
:
#using <mscorlib.dll>
#include <iostream>
#using "UsbSerialNumberCSharp.netmodule"
using namespace std;
using namespace System;
public __gc class UsbSerialNum
{
public:
UsbSerialNumberCSharp::UsbSerialNumberCSharp __gc *t;
UsbSerialNum() {
cout<<"Hello from C++";
t = new UsbSerialNumberCSharp::UsbSerialNumberCSharp();
}
void CallUsbSerialNumberCSharpHello() {
t->hello();
}
};
C# UsbSerialNumberCSharp.cs
文件从中我已经创建了 .netmodule
文件:
C# UsbSerialNumberCSharp.cs
file from which i've created the .netmodule
file:
using System.Collections.Generic;
using System.Text;
namespace UsbSerialNumberCSharp
{
public class UsbSerialNumberCSharp
{
public UsbSerialNumberCSharp(){
Console.WriteLine("hello");
}
public static void hello()
{
Console.WriteLine("hello");
}
public void helloCSharp ()
{
Console.WriteLine("helloCSharp");
}
}
}
下面是我的主要 makeDLL.cpp
文件从 makeDLL.dll
创建:
Here is my main makeDLL.cpp
file from which makeDLL.dll
is created:
#include "jni.h"
#include <iostream>
// This is the java header created using the javah -jni command.
#include "testDLL.h"
// This is the Managed C++ header that contains the call to the C#
#include "UsbSerialNum.h"
using namespace std;
JNIEXPORT void JNICALL Java_testDLL_hello
(JNIEnv *, jobject) {
// Instantiate the MC++ class.
UsbSerialNum* serial = new UsbSerialNum();
serial->CallUsbSerialNumberCSharpHello();
}
下面是我的java类:
Here is my java class:
public class testDLL {
static {
System.loadLibrary("makeDLL");
}
/**
* @param args
*/
public static void main (String[] args) {
// new testDLL().GetUSBDevices("SCR3", 100);
new testDLL().hello();
}
public native void hello();
}
编辑:
如果我根本不理会调用UsbSerial.h在我的主文件即使用简单的C ++,然后我的代码是用Java工作的罚款。基本上,C ++托管类不能正常工作。
请指引我。谢谢你。
If i simply ignore the call to UsbSerial.h in my main file i.e. use simple C++ then my code is working fine in Java. Basically C++ managed class is not working properly. Please guide me. Thanks.
推荐答案
这将是了解你所需要的正是这种互操作性非常有用。在任何情况下,你应该看看 IKVM ;或者你可以(因为已经建议对类似的问题)使用COM作为一个桥梁:揭露C#/ CLR作为一个COM接口,然后使用 com4j Java编写的。
It would be useful to know what you need this interoperability for exactly. In any case, you should look into IKVM; alternatively you can (as has been suggested for a similar problem) use COM as a bridge: expose the C#/CLR as a COM interface and then use com4j in Java.
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