Java海康SDK二次开发中遇到的常见挑战及解决方案

import java.io.IOException;
import java.util.Map;

public class SDKSetup {
    public static void main(String[] args) {
        String sdkPath = "path/to/sdk"; // 替换为SDK的实际路径
        
        try {
            String os = System.getProperty("os.name").toLowerCase();
            ProcessBuilder builder;
            
            if (os.contains("win")) {
                builder = new ProcessBuilder("cmd.exe", "/c", "setx HK_SDK_PATH "" + sdkPath + "" /M");
            } else {
                builder = new ProcessBuilder("bash", "-c", "export HK_SDK_PATH="" + sdkPath + """);
            }
            
            Map<String, String> env = builder.environment();
            builder.redirectErrorStream(true);
            
            Process process = builder.start();
            int exitCode = process.waitFor();
            
            if (exitCode == 0) {
                System.out.println("SDK环境变量配置成功！");
            } else {
                System.out.println("SDK环境变量配置失败！");
            }
            
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }
    }
}

import com.sun.jna.NativeLong;
import com.sun.jna.Pointer;

public class DeviceConnection {
    public static void main(String[] args) {
        HCNetSDK hCNetSDK = HCNetSDK.INSTANCE;
        
        // 初始化SDK
        hCNetSDK.NET_DVR_Init();
        
        // 登录设备
        NativeLong lUserID = new NativeLong(-1);
        HCNetSDK.NET_DVR_DEVICEINFO_V30 deviceInfo = new HCNetSDK.NET_DVR_DEVICEINFO_V30();
        lUserID = hCNetSDK.NET_DVR_Login_V30("192.168.1.100", (short) 8000, "admin", "password", deviceInfo);
        
        if (lUserID.intValue() == -1) {
            System.out.println("登录设备失败！");
            return;
        }
        
        // 获取设备状态
        HCNetSDK.NET_DVR_WORKSTATE_V30 deviceState = new HCNetSDK.NET_DVR_WORKSTATE_V30();
        boolean success = hCNetSDK.NET_DVR_GetDVRWorkState_V30(lUserID, deviceState);
        
        if (!success) {
            System.out.println("获取设备状态失败！");
        } else {
            System.out.println("设备状态：" + deviceState.dwDeviceStatic);
        }
        
        // 开始预览
        HCNetSDK.NET_DVR_PREVIEWINFO previewInfo = new HCNetSDK.NET_DVR_PREVIEWINFO();
        previewInfo.hPlayWnd = new NativeLong(0); // 可替换为实际的播放器窗口句柄
        previewInfo.lChannel = new NativeLong(1); // 可替换为实际需要预览的通道号
        previewInfo.dwStreamType = 0; // 实时预览主码流
        previewInfo.dwLinkMode = 0; // TCP方式预览
        
        NativeLong lPreviewHandle = hCNetSDK.NET_DVR_RealPlay_V40(lUserID, previewInfo, null);
        
        if (lPreviewHandle.intValue() == -1) {
            System.out.println("预览失败！");
        } else {
            System.out.println("开始预览...");
        }
        
        // 停止预览
        hCNetSDK.NET_DVR_StopRealPlay(lPreviewHandle);
        
        // 注销设备
        hCNetSDK.NET_DVR_Logout(lUserID);
        
        // 释放SDK资源
        hCNetSDK.NET_DVR_Cleanup();
    }
}