使用UnmanagedExports和JNA将字节数组从C#返回给Java
使用UnmanagedExports和JNA将字节数组从C#返回给Java
提问于 2014-12-31 05:03:09
我最近发现了一个库UnmanagedExports ，它允许我使用JNA直接从Java访问C#方法。
下面是我的例子：
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回答 1
Stack Overflow用户
发布于 2014-12-31 19:12:27
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);
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/27712515
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