Question

关于jna调用dll的问题

如果别人提供的函数如下：
接口功能 从内存中获取一个人员的注册信息
功能详细说明 从内存中读回一个人员的注册信息，在使用该接口函数前要先使用ReadAllUserID()函数从设备将人员的注册信息读至内部存储器。
函数声明 boolean GetAllUserID (
long dwMachineNumber,
long* dwEnrollNumber,
long* dwEMachineNumber,
long* dwBackupNumber,
long* dwMachinePrivilege,
long* dwEnable
);

long*是一个指针类型吗？long*说明是说这几个带long*的都是返回值。
那么函数是那样，long*哪里传值的时候怎么写，然后怎么取的返回值？
c/c++的long类型对应java也是long类型么？

Answer 1

public class test {
public static void main(String[] args) {
int dwMachineNumber;
IntByReference dwYear = new IntByReference();
IntByReference dwMonth = new IntByReference();
IntByReference dwDay = new IntByReference();
IntByReference dwHour = new IntByReference();
IntByReference dwMinute = new IntByReference();
IntByReference dwDayOfWeek = new IntByReference();

boolean result = dmapi.INSTANCE.GetAllUserID(dwMachineNumber,dwYear,dwMonth,dwDay,dwHour,dwMinute,dwDayOfWeek);
...
}
}
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Structure;

public interface dmapi extends Library {
dmapi INSTANCE = (dmapi)Native.loadLibrary("dmapi", dmapi.class);
public boolean GetAllUserID (
int dwMachineNumber,
IntByReference dwEnrollNumber,
IntByReference dwEMachineNumber,
IntByReference dwBackupNumber,
IntByReference dwMachinePrivilege,
IntByReference dwEnable
);
}
还有问题上QQ