项目总结25：海康威视SDK-Java二次开发-客流量分析

前言

本来一个很简单的SDK接口对接，折腾了好久；总结下原因有：

海康的SDK底层使用C++写的，我不熟悉C++；海康Java源码示例写的是一个Swing桌面应用，我需要的是嵌入到web项目；海康《设备网络SDK使用手册》中的示例是用C++写的；并且会出现使用手册和Java源码示例版本不匹配的情况（用手册版本高于Java源码示例版）

我的需求

统计一个出入口的实时进出客流量；即将摄像头产生的数据抓取出来保存到业务数据库SDK版本：6.0.2.35

准备工作

海康摄像头iDS-2CD681XYZUV-ABD/C；并已经现场安装成功；海康的SDK，下载地址(win64)：/cn/download_more_570.html；后面用到的全部文档和参考源码全部在SDK文档中

代码处理

将SDK开发包【库文件】里的HCNetSDK.dll、HCCore.dll、PlayCtrl.dll、SuperRender.dll、AudioRender.dll、HCNetSDKCom文件夹、ssleay32.dll、libeay32.dll文件均要加载到程序里面，【HCNetSDKCom文件夹】（包含里面的功能组件dll库文件）需要和HCNetSDK.dll、HCCore.dll一起加载，放在同一个目录下(我的事springboot项目，放在resources目录下)，且HCNetSDKCom文件夹名不能修改。将路径：Demo示例\4- Java 开发示例\2-报警布防监听\AlarmJavaDemo\src\alarmjavademo下的HCNetSDK类植入到项目中；修改HCNetSDK类中的HCNetSDK加载的路径，否则会报无法加载HCNetSDK.dll错误；

HCNetSDK INSTANCE = (HCNetSDK) Native.loadLibrary("HCNetSDK",HCNetSDK.class);改成String path=(HCNetSDK.class.getResource("/").getPath()).replaceAll("%20", " ").substring(1).replace("/", "\\")+"HCNetSDK.dll";HCNetSDK INSTANCE = (HCNetSDK) Native.loadLibrary(path,HCNetSDK.class);

写MemberFlowUploadService类，实现数据的抓取(见业务源码1);代码逻辑说明，可参考《设备网络SDK使用手册》-编程导引-客流量功模块的示例说明写MemberFlowUPloadCallBackImpl类，即回调函数(见业务源码2)；回调函数的实现，我参考书hideSDK中的Demo示例\4- Java 开发示例\2-报警布防监听\AlarmJavaDemo\src\alarmjavademo下的AlarmJavaDemoView类控制台结果输出

进入回调了sAlarmType---》lCommand=4355：客流量统计，进入人数：78，离开人数：83, byMode:0, dwRelativeTime:1298991096, dwAbsTime:1298991096进入回调了sAlarmType---》lCommand=4355：客流量统计，进入人数：0，离开人数：1, byMode:1, tmStart:0522163123,tmEnd :0522163200进入回调了sAlarmType---》lCommand=4355：客流量统计，进入人数：79，离开人数：83, byMode:0, dwRelativeTime:1298991115, dwAbsTime:1298991115

源码分析

源码1：MemberFlowUploadService类

package com.hs.api.service.haikang.meberflow;import org.springframework.stereotype.Service;import java.util.Timer;import java.util.TimerTask;@Servicepublic class MemberFlowUploadService{static HCNetSDK hCNetSDK = HCNetSDK.INSTANCE;static _DVR_USER_LOGIN_INFO m_strLoginInfo = new _DVR_USER_LOGIN_INFO();//设备登录信息static _DVR_DEVICEINFO_V40 m_strDeviceInfo = new _DVR_DEVICEINFO_V40();//设备信息static String m_sDeviceIP = "192.168.1.X";//已登录设备的IP地址static String m_sUsername = "XXX";//设备用户名static String m_sPassword = "XXXXXX";//设备密码static short m_sPort = 8000;//端口号public void initMemberFlowUpload(int remainMinuteTime){// 初始化 _DVR_Init();//设置连接时间与重连时间_DVR_SetConnectTime(2000, 1);_DVR_SetReconnect(10000, true);// 注册设备-登录参数，包括设备地址、登录用户、密码等m_strLoginInfo.sDeviceAddress = new byte[_DVR_DEV_ADDRESS_MAX_LEN];System.arraycopy(m_sDeviceIP.getBytes(), 0, m_strLoginInfo.sDeviceAddress, 0, m_sDeviceIP.length());m_strLoginInfo.sUserName = new byte[_DVR_LOGIN_USERNAME_MAX_LEN];System.arraycopy(m_sUsername.getBytes(), 0, m_strLoginInfo.sUserName, 0, m_sUsername.length());m_strLoginInfo.sPassword = new byte[_DVR_LOGIN_PASSWD_MAX_LEN];System.arraycopy(m_sPassword.getBytes(), 0, m_strLoginInfo.sPassword, 0, m_sPassword.length());m_strLoginInfo.wPort = m_sPort;m_strLoginInfo.bUseAsynLogin = false; //是否异步登录：0- 否，1- 是 m_strLoginInfo.write();//设备信息, 输出参数int lUserID = _DVR_Login_V40(m_strLoginInfo,m_strDeviceInfo);System.out.println("lUserID.size-->" + lUserID);if(lUserID< 0){System.out.println("_DVR_Login_V30()"+"\n" +_DVR_GetErrorMsg(null));_DVR_Cleanup();return;}//设置报警回调函数_DVR_SetDVRMessageCallBack_V31(new MemberFlowUPloadCallBackImpl(),null );//启用布防-其他报警布防参数不需要设置，不支持_DVR_SETUPALARM_PARAM lpSetupParam = new _DVR_SETUPALARM_PARAM();lpSetupParam.dwSize = 0;int lAlarmHandle = _DVR_SetupAlarmChan_V41(lUserID,lpSetupParam);if (lAlarmHandle< 0){System.out.println("NET_DVR_SetupAlarmChan_V41 error, %d\n"+_DVR_GetLastError());_DVR_Logout(lUserID);_DVR_Cleanup();return;}//等待过程中，如果设备上传报警信息，在报警回调函数里面接收和处理报警信息Timer timer = new Timer();// 实例化Timer类timer.schedule(new TimerTask() {public void run() {//撤销布防上传通道if (! _DVR_CloseAlarmChan_V30(lAlarmHandle)){System.out.println("! _DVR_CloseAlarmChan_V31(lAlarmHandle)\n"+ _DVR_GetLastError() +"\n" +_DVR_GetErrorMsg(null) );_DVR_Logout(lUserID);hCNetSDK. NET_DVR_Cleanup();return;}//注销用户_DVR_Logout(lUserID);//释放SDK资源_DVR_Cleanup();this.cancel();System.gc();//主动回收垃圾 }}, remainMinuteTime * 60 * 1000 );// 这里毫秒 }}

源码2：MemberFlowUPloadCallBackImpl类

package com.hs.api.service.haikang.meberflow;import com.hs.dao.entity.saichang.statistics.StatisticsMemberInOut;import com.hs.dao.service.impl.saichang.statistics.StatisticsMemberInOutService;import com.sun.jna.Pointer;import org.springframework.beans.factory.annotation.Autowired;import java.sql.Timestamp;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Date;import java.util.logging.Level;import java.util.logging.Logger;public class MemberFlowUPloadCallBackImpl implements HCNetSDK.FMSGCallBack_V31 {@Autowiredprivate StatisticsMemberInOutService statisticsMemberInOutService;@Overridepublic boolean invoke(int lCommand, _DVR_ALARMER pAlarmer, Pointer pAlarmInfo, int dwBufLen, Pointer pUser) {System.out.println("进入回调了");try {String sAlarmType = new String();//报警时间Date today = new Date();DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");String[] sIP = new String[2];sAlarmType = new String("lCommand=") + lCommand;//lCommand是传的报警类型_DVR_PDC_ALRAM_INFO strPDCResult = new _DVR_PDC_ALRAM_INFO();strPDCResult.write();Pointer pPDCInfo = strPDCResult.getPointer();pPDCInfo.write(0, pAlarmInfo.getByteArray(0, strPDCResult.size()), 0, strPDCResult.size());strPDCResult.read();if (strPDCResult.byMode == 0) {strPDCResult.uStatModeParam.setType(_DVR_STATFRAME.class);sAlarmType = sAlarmType + "：客流量统计，进入人数：" + strPDCResult.dwEnterNum + "，离开人数：" + strPDCResult.dwLeaveNum +", byMode:" + strPDCResult.byMode + ", dwRelativeTime:" + strPDCResult.uStatModeParam.struStatFrame.dwRelativeTime +", dwAbsTime:" + strPDCResult.uStatModeParam.struStatFrame.dwAbsTime;}if (strPDCResult.byMode == 1) {strPDCResult.uStatModeParam.setType(_DVR_STATTIME.class);//在这里实现数据的保存等业务逻辑，下面注释的代码是SDK提供的参考示例/*String strtmStart = "" + String.format("%04d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwYear) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwMonth) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwDay) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwHour) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwMinute) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmStart.dwSecond);String strtmEnd = "" + String.format("%04d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwYear) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwMonth) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwDay) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwHour) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwMinute) +String.format("%02d", strPDCResult.uStatModeParam.struStatTime.tmEnd.dwSecond);sAlarmType = sAlarmType + "：客流量统计，进入人数：" + strPDCResult.dwEnterNum + "，离开人数：" + strPDCResult.dwLeaveNum +", byMode:" + strPDCResult.byMode + ", tmStart:" + strtmStart + ",tmEnd :" + strtmEnd;*/}System.out.println("sAlarmType---》" +sAlarmType);//报警类型//报警设备IP地址sIP = new String(strPDCResult.struDevInfo.struDevIP.sIpV4).split("\0", 2);return true;} catch (Exception ex) {Logger.getLogger(MemberFlowUPloadCallBackImpl.class.getName()).log(Level.SEVERE, null, ex);return false;}}}

其他问题解决

项目开发没有问题，最后用maven打包项目时，HCNetSDK的加载出了问题，分析错误日志，发现是因为maven打包时进行了test，无法找到HCNetSDK，只要打包时不test就可以了；windos server 在jdk1.8.0_131下可以加载到HCNetSDK.dll(这里JDK默认在C:\Program Files ); 在更新的JDK版本中就不行(这里JDK默认在C:\Program Files (x86))