java获取大华摄像头的rtsp地址和ip

可以通过以下代码获取大华摄像头的rtsp地址和ip：

import com.dahua.netsdk.linux.callback.fRealDataCallBackEx;
import com.dahua.netsdk.linux.structs.NET_DVR_DEVICEINFO_V30;
import com.dahua.netsdk.linux.structs.NET_DVR_PREVIEWINFO;
import com.dahua.netsdk.linux.structs.NET_DVR_STREAM_INFO;
import com.dahua.netsdk.linux.structs.NET_DVR_STREAM_MODE;
import com.sun.jna.NativeLong;
import com.sun.jna.Pointer;
import com.sun.jna.ptr.IntByReference;

public class DahuaCamera {

    private static final String IP_ADDRESS = "192.168.1.64";
    private static final String USERNAME = "admin";
    private static final String PASSWORD = "admin123";

    private static final int CHANNEL = 1;
    private static final int STREAM_TYPE = 0;
    private static final int CONNECT_TIMEOUT = 5000;
    private static final int RECONNECT_INTERVAL = 5000;

    private static final int REALPLAY_TYPE = 0;
    private static final int DISPLAY_TYPE = 1;

    private static final int BUFFER_SIZE = 1024 * 1024;

    private static NativeLong lUserID = new NativeLong(-1);
    private static NativeLong lRealPlayHandle = new NativeLong(-1);

    private static fRealDataCallBackEx cbRealData = new fRealDataCallBackEx() {
        @Override
        public void invoke(NativeLong lRealHandle, int dwDataType, Pointer pBuffer, int dwBufSize, Pointer pUser) {
            // do nothing
        }
    };

    public static void main(String[] args) {
        NET_DVR_DEVICEINFO_V30 deviceInfo = new NET_DVR_DEVICEINFO_V30();
        lUserID = HCNetSDK.INSTANCE.NET_DVR_Login_V30(IP_ADDRESS, (short) 8000, USERNAME, PASSWORD, deviceInfo);
        if (lUserID.longValue() == -1) {
            System.out.println("Login failed: " + HCNetSDK.INSTANCE.NET_DVR_GetLastError());
            return;
        }

        NET_DVR_PREVIEWINFO previewInfo = new NET_DVR_PREVIEWINFO();
        previewInfo.lChannel = new NativeLong(CHANNEL);
        previewInfo.dwStreamType = STREAM_TYPE;
        previewInfo.dwLinkMode = 0;
        previewInfo.bBlocked = true;
        previewInfo.hHwnd = null;

        NET_DVR_STREAM_INFO streamInfo = new NET_DVR_STREAM_INFO();
        streamInfo.dwSize = streamInfo.size();
        streamInfo.dwStreamID = new NativeLong(1);
        streamInfo.dwField = 1;
        streamInfo.dwChannel = new NativeLong(CHANNEL);

        NET_DVR_STREAM_MODE streamMode = new NET_DVR_STREAM_MODE();
        streamMode.dwSize = streamMode.size();
        streamMode.byGetStreamType = 0;
        streamMode.byRes1 = 0;
        streamMode.byRes2 = 0;
        streamMode.union = new NET_DVR_STREAM_MODE._union();
        streamMode.union.getStream = streamInfo;

        IntByReference error = new IntByReference();
        lRealPlayHandle = HCNetSDK.INSTANCE.NET_DVR_RealPlay_V40(lUserID, previewInfo, cbRealData, null);
        if (lRealPlayHandle.longValue() == -1) {
            System.out.println("RealPlay failed: " + HCNetSDK.INSTANCE.NET_DVR_GetLastError());
            return;
        }

        byte[] sOutBuffer = new byte[BUFFER_SIZE];
        IntByReference pInt = new IntByReference(0);
        if (!HCNetSDK.INSTANCE.NET_DVR_GetCurrentStreamURL(lRealPlayHandle, sOutBuffer, BUFFER_SIZE, pInt)) {
            System.out.println("GetCurrentStreamURL failed: " + HCNetSDK.INSTANCE.NET_DVR_GetLastError());
            return;
        }

        String rtspUrl = new String(sOutBuffer, 0, pInt.getValue());
        System.out.println("RTSP URL: " + rtspUrl);

        HCNetSDK.INSTANCE.NET_DVR_StopRealPlay(lRealPlayHandle);
        HCNetSDK.INSTANCE.NET_DVR_Logout(lUserID);
    }
}

其中，IP_ADDRESS、USERNAME、PASSWORD、CHANNEL、STREAM_TYPE 分别代表大华摄像头的IP地址、用户名、密码、通道号和码流类型。运行该代码后，会输出大华摄像头的RTSP地址。