对接海康摄像头出现 java.lang.Error: Structure.getFieldOrder()

对接海康摄像头，在打成jar运行时出现:

Exception in thread "threadPoolTaskExecutor-1" java.lang.Error: Structure.getFieldOrder() on class com.ruoyi.web.equipment.hk.HCNetSDK$NET_DVR_USER_LOGIN_INFO does not provide enough names [0] ([]) to match declared fields [15] ([bUseAsynLogin, byHttps, byLoginMode, byProxyType, byRes2, byUseTransport, byUseUTCTime, byVerifyMode, cbLoginResult, iProxyID, pUser, sDeviceAddress, sPassword, sUserName, wPort])

这个问题是因为海康jna.jar比较老,结构体定义没有getFiledOrder，可创建一个类继承 Structure

import com.sun.jna.Structure;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;

/**
 * @author: tw
 * @date: 2022/1/12 10:57
 */
public class HIKSDKStructure extends Structure {
    protected List getFieldOrder(){
        List fieldOrderList = new ArrayList();
        for (Class cls = getClass();
             !cls.equals(HIKSDKStructure.class);
             cls = cls.getSuperclass()) {
            Field[] fields = cls.getDeclaredFields();
            int modifiers;
            for (Field field : fields) {
                modifiers = field.getModifiers();
                if (Modifier.isStatic(modifiers) || !Modifier.isPublic(modifiers)) {
                    continue;
                }
                fieldOrderList.add(field.getName());
            }
        }
        return fieldOrderList;
    }
}

然后 HCNetSDK 类里所有继承 Structure 替换为 HIKSDKStructure 即可