java实体对象与Map转换

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;

public class MapUtil {
	/**
     * 实体对象转成Map
     * @param obj 实体对象
     * @return
     */
    public static <T,V> Map<T, V> object2Map(Object obj) {
        Map<T, V> map = new HashMap<>();
        if (obj == null) {
            return map;
        }
        Class clazz = obj.getClass();
        Field[] fields = clazz.getDeclaredFields();
        try {
            for (Field field : fields) {
                field.setAccessible(true);
                map.put((T)field.getName(), (V)field.get(obj));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return map;
    }
    /**
     * Map转成实体对象
     * @param map map实体对象包含属性
     * @param clazz 实体对象类型
     * @return
     */
    public static <T,K,V> T map2Object(Map<K, V> map, Class<T> clazz) {
        if (map == null) {
            return null;
        }
        T obj = null;
        try {
            obj = clazz.newInstance();

            Field[] fields = obj.getClass().getDeclaredFields();
            for (Field field : fields) {
                int mod = field.getModifiers();
                if (Modifier.isStatic(mod) || Modifier.isFinal(mod)) {
                    continue;
                }
                field.setAccessible(true);
                field.set(obj, map.get(field.getName()));
            }
        } catch (Exception e) {
            e.printStackTrace();
        } 
        return obj;
    }
    
}

使用场景

//实时表数据更新
			MonitorDeviceTemp selectByPrimaryKey = mapper.selectByPrimaryKey(monitorDeviceTemp.getTempId());
			Map<Object, Object> objectObjectMap = MapUtil.object2Map(selectByPrimaryKey);
			MonitorDevice monitorDevice = MapUtil.map2Object(objectObjectMap, MonitorDevice.class);