Efficient workflow for secondary development of Java Hikvision SDK

Efficient workflow for secondary development of Java Hikvision SDK

Introduction:
In the current intelligent society, monitoring systems play an increasingly important role Role. As a leading domestic surveillance equipment supplier, Hikvision’s SDK provides powerful functions and interfaces, which is very suitable for secondary development. This article will introduce the efficient workflow of Java Hikvision SDK, and show how to perform secondary development through code examples.

1. Preparation

1. Download and install Hikvision SDK: Download and install the SDK from the Hikvision official website.
2. Import SDK into the project: Add the jar package of Hikvision SDK to the dependencies of the Java project.

2. Initialize the SDK environment
Before developing any functions, we need to initialize the SDK environment. The sample code is as follows:

import com.sun.jna.NativeLong;
import com.hikvision.netsdk.*;

public class SDKInit {

    public static void main(String[] args) {
        // 初始化SDK
        boolean initSuc = HCNetSDK.INSTANCE.NET_DVR_Init();
        if (initSuc){
            System.out.println("SDK初始化成功");
        } else {
            System.out.println("SDK初始化失败");
        }
        
        // 设置报警回调函数
        HCNetSDK.FMSGCallBack fMsgCallBack = (lCommand, pAlarmer, pAlarmInfo, dwBufLen, pUser) -> {
            // 处理报警信息
        };
        NativeLong lUser = new NativeLong(1);
        HCNetSDK.INSTANCE.NET_DVR_SetDVRMessageCallBack_V31(fMsgCallBack, lUser);
        
        // 设置异常回调函数
        HCNetSDK.FExceptionCallBack fExceptionCallBack = (dwType, lUserID, lHandle, pUser) -> {
            // 处理异常信息
        };
        HCNetSDK.INSTANCE.NET_DVR_SetExceptionCallBack_V30(0, lUser, fExceptionCallBack, null);
        
        // 其他初始化设置...
    }
}

3. Connect the device and log in
Before performing device-related operations, we need to connect the device and log in first. The sample code is as follows:

public class DeviceConnection {

    public static HCNetSDK.NET_DVR_DEVICEINFO_V30 login(String ip, int port, String username, String password) {
        // 设备初始化
        HCNetSDK.NET_DVR_Init();

        // 登录设备
        HCNetSDK.NET_DVR_DEVICEINFO_V30 deviceInfo = new HCNetSDK.NET_DVR_DEVICEINFO_V30();
        NativeLong lUserID = HCNetSDK.INSTANCE.NET_DVR_Login_V30(ip, port, username, password, deviceInfo);

        if (lUserID.longValue() == -1) {
            System.out.println("登录设备失败：" + HCNetSDK.INSTANCE.NET_DVR_GetLastError());
        } else {
            System.out.println("登录设备成功");
        }

        return deviceInfo;
    }
}

4. Perform device operations
Through Hikvision SDK, we can perform a variety of device operations, such as obtaining basic information of the device, real-time preview, screenshots, etc. The sample code is as follows:

public class DeviceOperation {

    public static void getDeviceInfo(HCNetSDK.NET_DVR_DEVICEINFO_V30 deviceInfo) {
        System.out.println("设备名称：" + new String(deviceInfo.sDVRName));
        System.out.println("设备编号：" + deviceInfo.getStruDeviceV30().byDeviceSerialNumber.seriaNumber);
        // 其他设备信息...
    }

    public static void livePreview(NativeLong lUserID) {
        HCNetSDK.NET_DVR_PREVIEWINFO previewInfo = new HCNetSDK.NET_DVR_PREVIEWINFO();
        previewInfo.lChannel = new NativeLong(1); // 预览通道号
        previewInfo.dwStreamType = 0; // 码流类型，0-主码流，1-子码流
        previewInfo.dwLinkMode = 0x0000; // 是否录像，0x0000-不录像，0x0001-录像
        previewInfo.hPlayWnd = null; // 预览窗口

        NativeLong lPlayHandle = HCNetSDK.INSTANCE.NET_DVR_RealPlay_V40(lUserID, previewInfo, null, null);
        if (lPlayHandle.longValue() == -1) {
            System.out.println("预览失败：" + HCNetSDK.INSTANCE.NET_DVR_GetLastError());
        } else {
            System.out.println("预览成功");
        }
    }

    public static void capturePicture(NativeLong lUserID, String savePath) {
        HCNetSDK.NET_DVR_JPEGPARA jpegPara = new HCNetSDK.NET_DVR_JPEGPARA();
        jpegPara.wPicQuality = 2; // 图片质量，2-高质量，1-中等质量，0-低质量
        jpegPara.wPicSize = 0; // 图片分辨率，0-最高分辨率

        if (HCNetSDK.INSTANCE.NET_DVR_CaptureJPEGPicture(lUserID, 1, jpegPara, savePath)) {
            System.out.println("抓图成功");
        } else {
            System.out.println("抓图失败：" + HCNetSDK.INSTANCE.NET_DVR_GetLastError());
        }
    }

    // 其他设备操作...
}

5. Release resources and log out
After using Hikvision SDK, you need to release resources and log out of the device in time. The sample code is as follows:

public class SDKRelease {

    public static void main(String[] args) {
        // 登出设备
        NativeLong lUserID = new NativeLong(1);
        if (HCNetSDK.INSTANCE.NET_DVR_Logout_V30(lUserID)) {
            System.out.println("登出设备成功");
        } else {
            System.out.println("登出设备失败：" + HCNetSDK.INSTANCE.NET_DVR_GetLastError());
        }

        // 释放SDK资源
        HCNetSDK.INSTANCE.NET_DVR_Cleanup();
        System.out.println("释放SDK资源");
    }
}

Conclusion:
Through the above introduction and sample code, we understand the efficient workflow of secondary development of Java Hikvision SDK. As long as you develop according to the above steps, you can easily use the functions and interfaces provided by Hikvision monitoring equipment to realize your own application needs. I hope this article will be helpful to your secondary development work!

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