我最近找到了图书馆UnmanagedExports 这让我可以使用 JNA 直接从 Java 访问 C# 方法.
有人知道我尝试将字节数组从 C# 返回到 Java 有什么问题吗?
这是我的例子:
C#代码:
using System;
using RGiesecke.DllExport;
namespace JnaTestLibrary
{
public class JnaTest
{
[DllExport]
public static byte[] returnT1()
{
byte[] t1 = {1,2,3,4,5};
return t1;
}
}
}
Java代码:
package me.mt.test;
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Platform;
public class JnaTest {
public interface JnaTestInterface extends Library{
byte[] returnT1();
}
static JnaTestInterface jnaTest = null;
static{
if(Platform.is64Bit()){
jnaTest = (JnaTestInterface)Native.loadLibrary("JnaTestLibrary64", JnaTestInterface.class);
}
else{
jnaTest = (JnaTestInterface)Native.loadLibrary("JnaTestLibrary86", JnaTestInterface.class);
}
}
public byte[] returnT1(){
return jnaTest.returnT1();
}
}
Java 异常:
Exception in thread "main" java.lang.IllegalArgumentException: Unsupported return type class [I in function returnT1
最佳答案
我用指针解决了这个问题。
C#代码:
using System;
using RGiesecke.DllExport;
namespace JnaTestLibrary
{
public class JnaTest
{
[DllExport]
public unsafe static byte* returnT1()
{
byte[] t1 = {1,2,3,4,5};
fixed (byte* p1 = t1)
{
return p1;
}
}
}
}
Java代码:
package me.mt.test;
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Platform;
import com.sun.jna.Pointer;
public class JnaTest {
public interface JnaTestInterface extends Library{
Pointer returnT1();
}
static JnaTestInterface jnaTest = null;
static{
if(Platform.is64Bit()){
jnaTest = (JnaTestInterface)Native.loadLibrary("JnaTestLibrary64", JnaTestInterface.class);
}
else{
jnaTest = (JnaTestInterface)Native.loadLibrary("JnaTestLibrary86", JnaTestInterface.class);
}
}
public byte[] returnT1(){
Pointer p1 = jnaTest.returnT1();
return p1.getByteArray(0, 5);
}
}
关于java - 使用 UnmanagedExports 和 JNA 将字节数组从 C# 返回到 Java,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27712515/