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JavaCPP —— Java 高效调用本地 C++ 方法

7月18日杭州 OSC 源创会正在报名,送机械键盘和开源无码内裤 JavaCPP —— Java 高效调用本地 C++ 方法

JavaCPP提供了在Java中高效访问本地C++的方法。采用JNI技术实现,支持所有Java实现包括Android系统,Avian 和RoboVM。

JavaCPP提供了一系列的Annotation将Java代码映射到C++代码,并使用一个可执行的jar包将C++代码转化为可以从JVM内调用的动态链接库文件。

Maven:

<dependency>     <groupId>org.bytedeco</groupId>     <artifactId>javacpp</artifactId>     <version>0.11</version> </dependency>

使用方法:

C++:

#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:

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());  } } 
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