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());
来源：51cto