Java 访问 C++ 方法:JavaCPP

  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>

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  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;

  };

  }

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  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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posted @ 2017-01-09 14:45  安吉吉吉  阅读(428)  评论(0编辑  收藏  举报