java对接海康门禁代码

对接海康门禁需要使用海康门禁SDK，以下是Java调用海康门禁SDK实现对门禁的开门操作的示例代码：

import com.sun.jna.Native;
import com.sun.jna.Pointer;
import com.sun.jna.ptr.ByteByReference;
import com.sun.jna.ptr.IntByReference;

public class HikvisionDoorController {

    public interface HikvisionLibrary extends com.sun.jna.Library {
        HikvisionLibrary INSTANCE = (HikvisionLibrary) Native.loadLibrary("CHCNetSDK", HikvisionLibrary.class);

        int NET_DVR_Init();

        int NET_DVR_Login_V40();

        int NET_DVR_Logout_V30();

        int NET_DVR_ControlGateway_V50();
    }

    public static void main(String[] args) {

        // 初始化SDK
        HikvisionLibrary.INSTANCE.NET_DVR_Init();

        // 登录门禁
        IntByReference lUserID = new IntByReference();
        HikvisionLibrary.NET_DVR_DEVICEINFO_V40 struDeviceInfo = new HikvisionLibrary.NET_DVR_DEVICEINFO_V40();
        lUserID.setValue(HikvisionLibrary.INSTANCE.NET_DVR_Login_V40("192.168.1.64", (short) 8000, "admin", "password", struDeviceInfo));

        // 开门
        HikvisionLibrary.NET_DVR_GATEWAY_CONTROL_CFG struControlCfg = new HikvisionLibrary.NET_DVR_GATEWAY_CONTROL_CFG();
        struControlCfg.dwSize = struControlCfg.size();
        struControlCfg.byControlType = 0x02; // 开门
        struControlCfg.byOpenDoorMode = 0x00; // 常开模式
        struControlCfg.byLockType = 0x00; // 无锁
        struControlCfg.byDoorTerminalMode = 0x00; // 门禁终端模式
        struControlCfg.byRes = new byte[31]; // 保留字段
        Pointer lpInBuffer = struControlCfg.getPointer();
        byte[] byOutBuffer = new byte[1024];
        IntByReference lpBytesReturned = new IntByReference();
        lpBytesReturned.setValue(0);
        ByteByReference lpStatus = new ByteByReference();
        lpStatus.setValue((byte) 0);
        boolean result = HikvisionLibrary.INSTANCE.NET_DVR_ControlGateway_V50(lUserID.getValue(), 0, lpInBuffer, struControlCfg.size(), byOutBuffer, 1024, lpBytesReturned, lpStatus, null);
        if (!result) {
            System.out.println("开门失败");
        }

        // 注销登录
        HikvisionLibrary.INSTANCE.NET_DVR_Logout_V30(lUserID.getValue());
    }
}

需要注意的是，代码中的IP地址、端口、用户名、密码等信息需要替换为实际的门禁设备信息。同时，需要将海康门禁SDK的库文件 CHCNetSDK.dll 放置在Java工程的运行路径下。