1

我正在使用javacpp从 Java 访问 cpp。

我已经尝试过文档中提供的示例

cpp代码：

#include <string>

namespace LegacyLibrary {
    class LegacyClass {
        public:
            const std::string& get_property() { return property; }
            void set_property(const std::string& property) { this->property = property; }
            std::string property;
    };
}

Java代码：

import org.bytedeco.javacpp.*;
import org.bytedeco.javacpp.annotation.*;

@Platform(include="LegacyLibrary.h")
@Namespace("LegacyLibrary")
public class LegacyLibrary {
    public static class LegacyClass extends Pointer {
        static { Loader.load(); }
        public LegacyClass() { allocate(); }
        private native void allocate();

        // to call the getter and setter functions 
        public native @StdString String get_property(); public native void set_property(String property);

        // to access the member variable directly
        public native @StdString String property();     public native void property(String property);
    }

    public static void main(String[] args) {
        // Pointer objects allocated in Java get deallocated once they become unreachable,
        // but C++ destructors can still be called in a timely fashion with Pointer.deallocate()
        LegacyClass l = new LegacyClass();
        l.set_property("Hello World!");
        System.out.println(l.property());
    }
}

我在eclipse中的文件夹结构

在此处输入图像描述

如果我在 Eclipse 中运行 LegacyLibrary.java 文件，我会收到以下错误

线程“main”中的异常 java.lang.UnsatisfiedLinkError: java.lang.ClassLoader.loadLibrary(Unknown Source) at java.lang.Runtime.loadLibrary0(Unknown Source) at java.lang.System 的 java.library.path 中没有 jniLegacyLibrary .loadLibrary(Unknown Source) at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:550) at org.bytedeco.javacpp.Loader.load(Loader.java:415) at org.bytedeco.javacpp.Loader.load (Loader.java:358) 在 LegacyLibrary$LegacyClass.(LegacyLibrary.java:8) 在 LegacyLibrary.main(LegacyLibrary.java:22)

我的代码有什么问题？

4

0 回答 0