Java调用海康威视接口并抓取Jpeg图片到内存_海康工业相机 java 存图

        因为工作需要，需要调用海康威视摄像头接口抓取Jpeg图片并保存到内存中，查找相关资料并整合，加上自己对官方提供的SDK文档，相关调用代码如下：

public class TestHikvision {
 
    public static void main(String[] args) throws IOException {
        TestHikvision app = new TestHikvision();
        
        MonitorCameraInfo cameraInfo = new MonitorCameraInfo();//需要新建MonitorCameraInfo类
        cameraInfo.setCameraIp("****");
        cameraInfo.setCameraPort(8000);
        cameraInfo.setUserName("admin");
        cameraInfo.setUserPwd("****");
        
        app.getDVRConfig(cameraInfo);
        app.getDVRPic(cameraInfo);
        //app.Test_CaptureJpegPicture_new(cameraInfo);
    }
 
    public void getDVRConfig(MonitorCameraInfo cameraInfo) {
        HCNetSDK sdk = HCNetSDK.INSTANCE;
        //判断摄像头是否开启
        if (!sdk.NET_DVR_Init()) {
            System.out.println("SDK初始化失败");
            return;
        }
        //设置连接时间与重连
        //sdk.NET_DVR_SetConnectTime(2000, 1);  
        //sdk.NET_DVR_SetReconnect(10000, true);
 
        NET_DVR_DEVICEINFO_V30 devinfo = new NET_DVR_DEVICEINFO_V30();// 设备信息
        
        //System.out.println("设备信息："+devinfo);
        
        //登录信息
        NativeLong id = sdk.NET_DVR_Login_V30(cameraInfo.getCameraIp(), (short) cameraInfo.getCameraPort(),
                cameraInfo.getUserName(), cameraInfo.getUserPwd(), devinfo);
 
        cameraInfo.setUserId(id);// 返回一个用户编号，同时将设备信息写入devinfo
        //输出int数据
        //S