java - JNI - 如何将 jshortArray 转换为短 *

Question

I have a dll file that contains the following function:

unsigned char * EncodingData(short Data[], int Length);

I want to call this native method in java. So I have created one wrapper dll that contains the follwing function corresponding to the above function

JNIEXPORT jcharArray JNICALL Java_com_common_FilterWrapper_EncodingData (JNIEnv * env, jclass cls, jshortArray shortData, jint len)

Now I am calling the above JNI function from java and it is being called successfully.

问题:

我想从包装器dll的函数调用dll文件的函数，但我不知道如何转换以下内容:

• jshortArray 到 short [](将数据传递给 dll 文件的函数，该函数需要 short [ ] 而不是 jshortArray)

• unsigned char 到 jcharArray(将值返回给 java 函数)

注意:包装器dll是用VC++编写的

Answer 1

unsigned short tempElem;
jshort* test = env->GetShortArrayElements(shortData, NULL);
int size = (sizeof(test) / sizeof(*test)) - 1;
for (int i = 0; i < size; i++) {
    tempElem = (unsigned short)test[i]);
    printf("[%d] test %u  || size = %d\n", i, tempElem, size);
}