Object轉換Map工具類
阿新 • • 發佈:2022-05-28
import com.google.common.collect.Lists; import com.google.common.collect.Maps; import org.springframework.cglib.beans.BeanMap; import java.util.List; import java.util.Map; /** * description: ObjToMapUtils * date: 2022/5/9 16:42:19 * * @author: zzx */ public class ObjToMapUtils { /** * 將物件裝換為map * * @param bean * @return */ public static <T> Map<String, Object> beanToMap(T bean) { Map<String, Object> map = Maps.newHashMap(); if (bean != null) { BeanMap beanMap = BeanMap.create(bean); for (Object key : beanMap.keySet()) { map.put(key + "", beanMap.get(key)); } } return map; } /** * 將map裝換為javabean物件 * * @param map * @param bean * @return */ public static <T> T mapToBean(Map<String, Object> map, T bean) { BeanMap beanMap = BeanMap.create(bean); beanMap.putAll(map); return bean; } /** * 將List<T>轉換為List<Map<String, Object>> * * @param objList * @return */ public static <T> List<Map<String, Object>> objectsToMaps(List<T> objList) { List<Map<String, Object>> list = Lists.newArrayList(); if (objList != null && objList.size() > 0) { Map<String, Object> map = null; T bean = null; for (int i = 0, size = objList.size(); i < size; i++) { bean = objList.get(i); map = beanToMap(bean); list.add(map); } } return list; } /** * 將List<Map<String,Object>>轉換為List<T> * * @param maps * @param clazz * @return * @throws InstantiationException * @throws IllegalAccessException */ public static <T> List<T> mapsToObjects(List<Map<String, Object>> maps, Class<T> clazz) throws InstantiationException, IllegalAccessException { List<T> list = Lists.newArrayList(); if (maps != null && maps.size() > 0) { Map<String, Object> map = null; T bean = null; for (int i = 0, size = maps.size(); i < size; i++) { map = maps.get(i); bean = clazz.newInstance(); mapToBean(map, bean); list.add(bean); } } return list; } }