一、JAVA调用海康威视SDK实现摄像头预览

环境准备

1. 开发工具：eclipse
2. Jdk版本：jdk1.8
3. 开发语言：java，界面使用swing开发
4. 摄像头：
5. 海康威视SDK下载地址：下载地址
6. SDK版本：CH-HCNetSDKV6.0.2.35_build20190411_Win64

代码实现

使用海康威视SDK，生成监控摄像头预览功能。

1. 实现流程

SDK初始化->用户注册->获取通道号->开始播放->开启声音。

2. 项目结构

3. SDK目录

4. 实现代码

• 启动类

package com.kx.hcws;

import javax.swing.JFrame;
import javax.swing.JPopupMenu;

import com.kx.hcws.sdk.HCNetSDK;
import com.kx.hcws.sdk.HCNetSDKManger;
import com.kx.hcws.ui.Player;

public class PreView {
	// private static String ip;
	// private static String username;
	// private static String password;

	public static void main(String[] args) {
		// 确保一个漂亮的外观风格
		JFrame.setDefaultLookAndFeelDecorated(true);
		JPopupMenu.setDefaultLightWeightPopupEnabled(false);// 防止被播放窗口(AWT组件)覆盖

		// 显示应用 GUI
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			@Override
			public void run() {
				// 初始化海康播放器
				HCNetSDKManger.init();
				HCNetSDK.INSTANCE.NET_DVR_Init();
				HCNetSDK.INSTANCE.NET_DVR_SetConnectTime(5000, 5);
				HCNetSDK.INSTANCE.NET_DVR_SetReconnect(1000, true);

				/*
				 * IP地址：摄像头IP地址。 用户名：摄像头登录用户名。 密码：摄像头验证码。 摄像头编号：可以自定义。
				 */
				new Player("192.168.2.18", "admin", "密码", 8000, 1L);
			}
		});
	}
}

• 播放组件

package com.kx.hcws.ui;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;

import javax.swing.JOptionPane;
import javax.swing.JPanel;

import com.kx.hcws.sdk.HCNetSDK;
import com.kx.hcws.sdk.HCNetSDK.FExceptionCallBack;
import com.kx.hcws.sdk.HCNetSDKManger;
import com.kx.hcws.sdk.PlayCtrl;
import com.sun.jna.Native;
import com.sun.jna.NativeLong;
import com.sun.jna.Pointer;
import com.sun.jna.examples.win32.W32API.HWND;
import com.sun.jna.ptr.IntByReference;
import com.sun.jna.ptr.NativeLongByReference;

public class HcPlayerPanel extends JPanel {
	private static org.apache.log4j.Logger logger = org.apache.log4j.Logger.getLogger(HcPlayerPanel.class);

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	// 播放控制
	private static PlayCtrl playControl = PlayCtrl.INSTANCE;

	private String m_sDeviceIP;
	private String username;
	private String password;
	private int port;
	private Long deviceId = 1L;

	private long iChannelNum;

	// 用户参数
	private HCNetSDK.NET_DVR_CLIENTINFO m_strClientInfo;
	// 预览句柄
	private NativeLong lPreviewHandle = new NativeLong(-1);
	// 播放界面
	public java.awt.Panel panelRealplay = new java.awt.Panel();
	public javax.swing.JPanel jPanelRealplayArea = new javax.swing.JPanel();
	// 设备指针
	private NativeLongByReference devicePoint;
	// 播放端口
	private NativeLongByReference m_lPort = new NativeLongByReference(new NativeLong(-1));
	// 异常回调
	private FExceptionCallBack exceptionCallBack = new FExceptionCallBack() {
		@Override
		public void invoke(int dwType, NativeLong lUserID, NativeLong lHandle, Pointer pUser) {
			NativeLong deviceid = pUser.getNativeLong(0);

			System.out.println("预览异常：dwType=" + dwType + ",lUserID=" + lUserID + ",lHandle=" + lHandle + ",pUser="
					+ deviceid.intValue());

			// EXCEPTION_EXCHANGE = 0x8000;// 用户交互时异常
			// EXCEPTION_AUDIOEXCHANGE = 0x8001;//语音对讲异常
			// EXCEPTION_ALARM = 0x8002;// 报警异常
			// EXCEPTION_PREVIEW = 0x8003;// 网络预览异常
			// EXCEPTION_SERIAL = 0x8004;// 透明通道异常
			// EXCEPTION_RECONNECT = 0x8005; // 预览时重连
			// EXCEPTION_ALARMRECONNECT = 0x8006;//报警时重连
			// EXCEPTION_SERIALRECONNECT = 0x8007;//透明通道重连
			// EXCEPTION_PLAYBACK = 0x8010;// 回放异常
			// EXCEPTION_DISKFMT = 0x8011;// 硬盘格式化
			if (dwType == HCNetSDK.EXCEPTION_ALARM || dwType == HCNetSDK.EXCEPTION_RECONNECT
					|| dwType == HCNetSDK.EXCEPTION_ALARMRECONNECT || dwType == HCNetSDK.EXCEPTION_SERIALRECONNECT
					|| dwType == HCNetSDK.EXCEPTION_PLAYBACK || dwType == 32971 || dwType == 32776 || dwType == 32789
					|| dwType == 32790 || dwType == 32791 || dwType == 32776 || dwType == 32793 || dwType == 32800
					|| dwType == 32804 || dwType == 32805 || dwType == 32832 || dwType == 32833 || dwType == 32834) {
				return;
			}
		}
	};

	public HcPlayerPanel(String m_sDeviceIP, String username, String password, int port, Long deviceId) {
		this.m_sDeviceIP = m_sDeviceIP;
		this.username = username;
		this.password = password;
		this.port = port;
		this.deviceId = deviceId;

		init();
	}

	private void init() {
		panelRealplay.setBackground(Color.BLACK);
		jPanelRealplayArea.setBackground(Color.BLACK);
		javax.swing.GroupLayout panelRealplayLayout = new javax.swing.GroupLayout(panelRealplay);
		panelRealplay.setLayout(panelRealplayLayout);
		javax.swing.GroupLayout jPanelRealplayAreaLayout = new javax.swing.GroupLayout(jPanelRealplayArea);
		jPanelRealplayArea.setLayout(jPanelRealplayAreaLayout);
		jPanelRealplayAreaLayout.setHorizontalGroup(
				jPanelRealplayAreaLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(
						panelRealplay, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE,
						javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));
		jPanelRealplayAreaLayout.setVerticalGroup(jPanelRealplayAreaLayout
				.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(panelRealplay,
						javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE));
		devicePoint = new NativeLongByReference(new NativeLong(deviceId));// 设备编号
		// 注册异常信息
		HCNetSDKManger.hCNetSDK.NET_DVR_SetExceptionCallBack_V30(0, 0, exceptionCallBack, devicePoint.getPointer());
	}

	public void play() {
		NativeLong lUserID = new NativeLong(-1);// 用户句柄
		if (lUserID.longValue() > -1) {// 不注销
			// 先注销
			HCNetSDKManger.hCNetSDK.NET_DVR_Logout_V30(lUserID);
			lUserID = new NativeLong(-1);
		}
		// 注册
		HCNetSDK.NET_DVR_DEVICEINFO_V30 m_strDeviceInfo = new HCNetSDK.NET_DVR_DEVICEINFO_V30();
		lUserID = HCNetSDKManger.hCNetSDK.NET_DVR_Login_V30(m_sDeviceIP, (short) port, username, password,
				m_strDeviceInfo);
		long userID = lUserID.longValue();
		if (userID == -1) {
			System.out.println(HCNetSDKManger.hCNetSDK.NET_DVR_GetLastError());
			System.out.println("设备注册失败：" + m_sDeviceIP + "--" + username + "--" + password + "--" + port);
			JOptionPane.showMessageDialog(this, "注册失败");
			return;
		} else {
			// CreateDeviceTree();
		}

		if (lUserID == null || lUserID.intValue() == -1) {
			logger.info("注册失败");
			return;
		}

		panelRealplay.setPreferredSize(new Dimension(getWidth(), getHeight()));
		removeAll();

		add(jPanelRealplayArea, BorderLayout.CENTER);
		revalidate();

		// 获取窗口句柄
		HWND hwnd = new HWND(Native.getComponentPointer(panelRealplay));
		// 获取通道号

		IntByReference ibrBytesReturned = new IntByReference(0);// 获取IP接入配置参数
		boolean bRet = false;

		HCNetSDK.NET_DVR_IPPARACFG m_strIpparaCfg = new HCNetSDK.NET_DVR_IPPARACFG();
		m_strIpparaCfg.write();
		Pointer lpIpParaConfig = m_strIpparaCfg.getPointer();
		bRet = HCNetSDKManger.hCNetSDK.NET_DVR_GetDVRConfig(lUserID, HCNetSDK.NET_DVR_GET_IPPARACFG, new NativeLong(0),
				lpIpParaConfig, m_strIpparaCfg.size(), ibrBytesReturned);
		m_strIpparaCfg.read();

		// 设备支持IP通道
		String sChannelName = "";
		if (!bRet) {
			// 设备不支持,则表示没有IP通道
			for (int iChannum = 0; iChannum < m_strDeviceInfo.byChanNum; iChannum++) {
				sChannelName = "Camera" + (iChannum + m_strDeviceInfo.byStartChan);
			}
		} else {
			// 设备支持IP通道
			for (int iChannum = 0; iChannum < m_strDeviceInfo.byChanNum; iChannum++) {
				if (m_strIpparaCfg.byAnalogChanEnable[iChannum] == 1) {
					sChannelName = "Camera" + (iChannum + m_strDeviceInfo.byStartChan);
				}
			}
			for (int iChannum = 0; iChannum < HCNetSDK.MAX_IP_CHANNEL; iChannum++)
				if (m_strIpparaCfg.struIPChanInfo[iChannum].byEnable == 1) {
					sChannelName = "IPCamera" + (iChannum + m_strDeviceInfo.byStartChan);
				}
		}
		iChannelNum = -1;
		if (sChannelName.charAt(0) == 'C') {// Camara开头表示模拟通道
			// 子字符串中获取通道号
			iChannelNum = Integer.parseInt(sChannelName.substring(6));
		} else {
			if (sChannelName.charAt(0) == 'I') {// IPCamara开头表示IP通道,子字符创中获取通道号,IP通道号要加32
				iChannelNum = Integer.parseInt(sChannelName.substring(8)) + 32;
			} else {
				logger.info("通道号获取失败");
				return;
			}
		}
		if (iChannelNum == -1) {
			logger.info("请选择要预览的通道");
			return;
		}

		m_strClientInfo = new HCNetSDK.NET_DVR_CLIENTINFO();
		m_strClientInfo.lChannel = new NativeLong(iChannelNum);
		m_strClientInfo.hPlayWnd = hwnd;
		lPreviewHandle = HCNetSDKManger.hCNetSDK.NET_DVR_RealPlay_V30(lUserID, m_strClientInfo, null, null, true);
		long previewSucValue = lPreviewHandle.longValue();
		// 预览失败时:
		if (previewSucValue == -1) {
			System.out.println("预览失败:" + HCNetSDKManger.hCNetSDK.NET_DVR_GetLastError());
			return;
		}
		System.out.println("预览成功！");
		validate();
	}

	public void stop() {
		logger.info("设备" + deviceId + "停止播放===================");
		if (lPreviewHandle != null && lPreviewHandle.longValue() != -1) {
			if (!HCNetSDKManger.hCNetSDK.NET_DVR_StopRealPlay(lPreviewHandle)) {
				logger.info("设备" + deviceId + "停止播放失败");
			}
			if (m_lPort.getValue().intValue() != -1) {
				if (!playControl.PlayM4_Stop(m_lPort.getValue())) {
					logger.info("设备" + deviceId + "停止播放失败");
				}
				m_lPort.setValue(new NativeLong(-1));
			}
		}
		panelRealplay.repaint();
	}
}

• 播放窗体

package com.kx.hcws;

import javax.swing.JFrame;
import javax.swing.JPopupMenu;

import com.kx.hcws.sdk.HCNetSDK;
import com.kx.hcws.sdk.HCNetSDKManger;
import com.kx.hcws.ui.Player;

public class PreView {
	// private static String ip;
	// private static String username;
	// private static String password;

	public static void main(String[] args) {
		// 确保一个漂亮的外观风格
		JFrame.setDefaultLookAndFeelDecorated(true);
		JPopupMenu.setDefaultLightWeightPopupEnabled(false);// 防止被播放窗口(AWT组件)覆盖

		// 显示应用 GUI
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			@Override
			public void run() {
				// 初始化海康播放器
				HCNetSDKManger.init();
				HCNetSDK.INSTANCE.NET_DVR_Init();
				HCNetSDK.INSTANCE.NET_DVR_SetConnectTime(5000, 5);
				HCNetSDK.INSTANCE.NET_DVR_SetReconnect(1000, true);

				/*
				 * IP地址：摄像头IP地址。
				 * 用户名：摄像头登录用户名。
				 * 密码：摄像头验证码。
				 * 摄像头编号：可以自定义。
				 */
				new Player("192.168.2.1", "admin", "123456", 544, 1L);
			}
		});
	}
}

5. 总结
1.海康威视DDL文件按照说明必须全部拷贝到对应文件夹。
2.java.lang.UnsatisfiedLinkError: Unable to load library ‘HCNetSDK’: ÕҲ»µ½ָ¶¨问题
处理办法：SDK文件路径不正确， 需要放在项目根目录下，路径改为全路径或者使用代码组装完整路径。

效果预览

项目源码

源码