Java调用c++动态链接库用的 JNI转换接口

xxx.h

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class com_company_base_GPSEncode */

#ifndef _Included_com_company_base_GPSEncode
#define _Included_com_company_base_GPSEncode

#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: com_fleety_base_GPSEncode
* Method: encode
* Signature: (DD[D)Z
*/
JNIEXPORT jboolean JNICALL Java_com_company_base_GPSEncode_encode
(JNIEnv *, jclass, jdouble, jdouble, jdoubleArray);

/*
* Class: com_fleety_base_GPSDecode
* Method: decode
* Signature: (DD[D)Z
*/
JNIEXPORT jboolean JNICALL Java_com_company_base_GPSEncode_decode
(JNIEnv *, jclass, jdouble, jdouble, jdoubleArray);

#ifdef __cplusplus
}
#endif
#endif

xxx.cpp

#include "stdafx.h"
#include <stdio.h>
#include "xxx.h"
#include "DataLib.h"

JNIEXPORT jboolean JNICALL Java_com_company_base_GPSEncode_encode
(JNIEnv* env, jclass cls, jdouble lo, jdouble la, jdoubleArray jResultArr)
{
// printf("test encode!/n");
double loOut = 0;
double laOut = 0;

bool bResult = encode(lo,la,loOut,laOut);

if(bResult)
{
env->SetDoubleArrayRegion(jResultArr,0,1,&loOut);
env->SetDoubleArrayRegion(jResultArr,1,1,&laOut);
}

return bResult;
}

JNIEXPORT jboolean JNICALL Java_com_company_base_GPSEncode_decode
(JNIEnv* env, jclass cls, jdouble lo, jdouble la, jdoubleArray jResultArr)
{
// printf("test decode!/n");
double loOut = 0;
double laOut = 0;

bool bResult = decode(lo,la,loOut,laOut);

if(bResult)
{
env->SetDoubleArrayRegion(jResultArr,0,1,&loOut);
env->SetDoubleArrayRegion(jResultArr,1,1,&laOut);
}

return bResult;
}