jna调用c++动态库实体类传参

1、win10平台代码  c++ 头文件

pch.h

#ifndef PCH_H
#define PCH_H// 添加要在此处预编译的标头
#include "framework.h"#ifdef __cplusplus
#define EXPORT extern "C" __declspec(dllexport)
#else 
#define EXPORT __declspec(dllexport)
#endiftypedef struct Example3Struct {int val;char* name;
} Example3Struct;EXPORT void example3_sendStruct(const Example3Struct* sval);
#endif //PCH_H

cpp文件  pch.cpp

// pch.cpp: 与预编译标头对应的源文件#include "pch.h"
#include "iostream"void example3_sendStruct(const Example3Struct* sval){// note: printfs called from C won't be flushed// to stdout until the Java process completesstd::cout << sval->val << std::endl;std::cout << sval->name << std::endl;}

使用Visual Studio 导出动态库

java 调用  

VideoAiLibrary.java

package com.example.demo.jna;import com.sun.jna.Library;
import com.sun.jna.Structure;public interface VideoAiLibrary extends Library {@Structure.FieldOrder({"val","name"})public static class Example3Struct extends Structure {public static class ByReference extends Example3Struct implements Structure.ByReference {}public int val;public String name;}// unless otherwise specified, ByReference is assumed - but it can't hurt to be explicitpublic void example3_sendStruct(Example3Struct.ByReference sval);
}

测试

package com.example.demo.jna;import com.sun.jna.Native;public class JnaTest {public static  void main(String ... args){final VideoAiLibrary clib = (VideoAiLibrary) Native.load("mycpp11", VideoAiLibrary.class);final VideoAiLibrary.Example3Struct.ByReference e3ref = new VideoAiLibrary.Example3Struct.ByReference();e3ref.val = 700;e3ref.name="朱dddp";clib.example3_sendStruct(e3ref);}}

linux 代码唯一区别是 pch.h头文件  内容如下

#ifndef PCH_H
#define PCH_H#ifdef __cplusplus
#ifdef _WIN32
#define EXPORT extern "C" __declspec(dllexport)
#else
#define EXPORT extern "C"
#endif
#else
#ifdef _WIN32
#define EXPORT __declspec(dllexport)
#else
#define EXPORT
#endif
#endiftypedef struct Example3Struct {int val;char* name;
} Example3Struct;EXPORT void example3_sendStruct(const Example3Struct* sval);
#endif //PCH_H

cd /aiprogram/cpp/JNA_TEST/#编译c++ 动态库bash runcpp.sh#运行java代码示例bash runjava.sh

linux 编译和java 代码如下

src 下c++代码，include 下c++的.h头文件，java_code 下java代码

通过百度网盘分享的文件：JNA_TEST.zip
链接：https://pan.baidu.com/s/1uA4r8gJM5-vut73OoAQZMg?pwd=4ob0 
提取码：4ob0