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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