import java.beans.PropertyDescriptor; import java.io.Serializable; import java.lang.reflect.Field; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; import java.util.TreeMap; import org.apache.commons.beanutils.PropertyUtils; import org.apache.commons.lang3.reflect.FieldUtils; public class MapUtils { /** * 将Map数据填充到指定Bean对象中 * * @param bean * @param map */ public static void applyToObject(Object bean, Map<String, Serializable> map) { try { for (Entry<String, ?> entry : map.entrySet()) { PropertyUtils.setProperty(bean, entry.getKey(), entry.getValue()); } } catch (Throwable t) { throw new IllegalArgumentException(t); } } /** * map中的数据更新到指定对象同名属性中 * * @param target * @param map */ @SuppressWarnings({"rawtypes", "unchecked"}) public static void updateFromMap(Object target, Map<String, ?> map) { for (Entry<String, ?> entry : map.entrySet()) { try { Object value = entry.getValue(); String fieldName = entry.getKey(); Field field = FieldUtils.getField(target.getClass(), fieldName); if (value != null && field != null) { // 处理枚举 Class fieldClass = field.getType(); if (fieldClass.isEnum()) value = Enum.valueOf(fieldClass, value.toString()); field.set(target, value); } } catch (IllegalAccessException e) { throw new IllegalArgumentException(e); } } } /** * 指定对象转换为Map<String,Object>; * * @param target * @return */ public static Map<String, Object> convertToMap(Object target) { try { Map<String, Object> map = new HashMap<String, Object>(); PropertyDescriptor pds[] = PropertyUtils.getPropertyDescriptors(target); for (PropertyDescriptor pd : pds) { if (pd.getName().equals("class")) continue; map.put(pd.getName(), pd.getReadMethod().invoke(target)); } return map; } catch (Exception e) { throw new IllegalArgumentException(e); } } /** * 指定对象转换为Map<String,Serializable>; * * @param bean * @return */ public static Map<String, Serializable> convertToMapWithSerializable(Object bean) { try { Map<String, Serializable> result = new TreeMap<String, Serializable>(); for (PropertyDescriptor pd : PropertyUtils.getPropertyDescriptors(bean.getClass())) { if (pd.getName().equals("class")) continue; Object value = PropertyUtils.getProperty(bean, pd.getName()); if (value instanceof Serializable) result.put(pd.getName(), (Serializable) value); } return result; } catch (Throwable t) { throw new IllegalArgumentException(t); } } }
简单的mapUtils,
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转载自www.cnblogs.com/yanglw/p/11750812.html
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