接上一章：一、JAVA调用海康威视SDK实现摄像头预览

1. 添加摄像头信息输入框
2. 添加视频控制按钮
3. 添加截图功能

代码：

• PreView.java

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。
                 * 
                 * "192.168.2.18", "admin", "axjy123456", 8000, 1L
                 */
                new Player();
            }
        });
    }
}

• HcPlayerPanel.java

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;

    private boolean isplay = false;

    // 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() {
        init();
    }

    /**
     * 开始，传入对应参数
     * 
     * @param m_sDeviceIP
     * @param username
     * @param password
     * @param port
     * @param deviceId
     */
    public void start(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;
    }

    /**
     * 初始化组件
     */
    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

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

        // 注册异常信息
        HCNetSDKManger.hCNetSDK.NET_DVR_SetExceptionCallBack_V30(0, 0, exceptionCallBack, devicePoint.getPointer());
    }

    /**
     * 开始播放
     */
    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();
        isplay = true;
    }

    /**
     * 停止播放
     */
    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();
        isplay = false;
    }

    public boolean isIsplay() {
        return isplay;
    }

    /**
     * 实现截图
     */
    public void snapshot(String filepath) {
        if (!HCNetSDKManger.hCNetSDK.NET_DVR_CapturePicture(lPreviewHandle, filepath)) {
            JOptionPane.showMessageDialog(this, "设备截屏失败:" + HCNetSDKManger.hCNetSDK.NET_DVR_GetLastError());
            System.out.println("设备截屏失败:" + HCNetSDKManger.hCNetSDK.NET_DVR_GetLastError());
        }else{
            JOptionPane.showMessageDialog(this, "截图成功！");
        }
    }
}

• Player.java

package com.kx.hcws.ui;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.util.Date;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Player extends JFrame implements WindowListener {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    private HcPlayerPanel playerPanel;

    private JTextField ipField;
    private JTextField usernameField;
    private JPasswordField pwdField;

    public Player() {
        setSize(1200, 600);
        setResizable(true);
        setTitle("设备预览");
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 关闭窗口时关闭系统

        getContentPane().setLayout(new BorderLayout());

        playerPanel = new HcPlayerPanel();
        playerPanel.setBackground(Color.BLACK);
        playerPanel.setPreferredSize(new Dimension(1000, 600));

        getContentPane().add(playerPanel, BorderLayout.CENTER);

        initCtrlPanel();

        setVisible(true);
    }

    private void initCtrlPanel() {
        JPanel content = new JPanel();
        content.setLayout(new FlowLayout());

        {// IP
            JLabel jLabel = new JLabel("IP：");
            jLabel.setPreferredSize(new Dimension(60, 30));
            jLabel.setHorizontalTextPosition(JLabel.CENTER);
            jLabel.setVerticalAlignment(JLabel.CENTER);
            content.add(jLabel);

            ipField = new JTextField();
            ipField.setPreferredSize(new Dimension(130, 30));
            content.add(ipField);
        }

        {// 用户名
            JLabel jLabel = new JLabel("用户名：");
            jLabel.setPreferredSize(new Dimension(60, 30));
            jLabel.setHorizontalTextPosition(JLabel.CENTER);
            jLabel.setVerticalAlignment(JLabel.CENTER);
            content.add(jLabel);

            usernameField = new JTextField("admin");
            usernameField.setPreferredSize(new Dimension(130, 30));
            content.add(usernameField);
        }

        {// 密码
            JLabel jLabel = new JLabel("密码：");
            jLabel.setPreferredSize(new Dimension(60, 30));
            jLabel.setHorizontalTextPosition(JLabel.CENTER);
            jLabel.setVerticalAlignment(JLabel.CENTER);
            content.add(jLabel);

            pwdField = new JPasswordField("");
            pwdField.setPreferredSize(new Dimension(130, 30));
            content.add(pwdField);
        }

        {// 按钮
            JButton playBtn = new JButton("播放");
            playBtn.setPreferredSize(new Dimension(150, 30));
            playBtn.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    String m_sDeviceIP = ipField.getText();
                    if (m_sDeviceIP == null || "".equals(m_sDeviceIP)) {
                        JOptionPane.showMessageDialog(Player.this, "IP不能为空");
                        return;
                    }

                    String username = usernameField.getText();
                    if (username == null || "".equals(username)) {
                        JOptionPane.showMessageDialog(Player.this, "用户名不能为空");
                        return;
                    }

                    String password = pwdField.getText();
                    if (password == null || "".equals(password)) {
                        JOptionPane.showMessageDialog(Player.this, "密码不能为空");
                        return;
                    }

                    if (playerPanel.isIsplay()) {// 先停止
                        playerPanel.stop();
                    }
                    playerPanel.start(m_sDeviceIP, username, password, 8000, 1L);

                    new Thread(new Runnable() {
                        @Override
                        public void run() {
                            playerPanel.play();
                        }
                    }).start();
                }
            });
            content.add(playBtn);

            JButton imgBtn = new JButton("截图");
            imgBtn.setPreferredSize(new Dimension(150, 30));
            imgBtn.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    if (!playerPanel.isIsplay()) {// 先停止
                        JOptionPane.showMessageDialog(Player.this, "请先预览！");
                        return;
                    }
                    JFileChooser filechooser = new JFileChooser();// 创建文件选择器
                    filechooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
                    int returnVal = filechooser.showOpenDialog(Player.this);
                    if (returnVal == JFileChooser.APPROVE_OPTION) {
                        String file = filechooser.getSelectedFile().getAbsolutePath() + "\\" + new Date().getTime()
                                + ".jpg";
                        playerPanel.snapshot(file);
                    }
                }
            });
            content.add(imgBtn);
        }

        content.setPreferredSize(new Dimension(200, 600));

        getContentPane().add(content, BorderLayout.WEST);
    }

    @Override
    public void windowActivated(WindowEvent e) {

    }

    @Override
    public void windowClosed(WindowEvent e) {
    }

    @Override
    public void windowClosing(WindowEvent e) {
        playerPanel.stop();
    }

    @Override
    public void windowDeactivated(WindowEvent e) {

    }

    @Override
    public void windowDeiconified(WindowEvent e) {

    }

    @Override
    public void windowIconified(WindowEvent e) {

    }

    @Override
    public void windowOpened(WindowEvent e) {

    }
}

预览：

20210702213201779.png

20210702213227612.png

20210702213253109.png

20210702213308914.png

源码：源码下载