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package utils; import java.beans.PropertyDescriptor; import java.lang.reflect.Array; import java.lang.reflect.InvocationTargetException; import java.sql.Timestamp; import java.util.Collection; import java.util.Date; import java.util.Map; import java.util.Map.Entry; import org.apache.commons.beanutils.BeanUtilsBean; /** * bean屬性拷貝幫助類 * * @author zengjie * @version [版本號, 2012-11-26] * @see [相關(guān)類/方法] * @since [產(chǎn)品/模塊版本] */ public class BeanUtils { /** * 對一個(gè)bean進(jìn)行深度復(fù)制，所有的屬性節(jié)點(diǎn)全部會被復(fù)制 * * @param source * @return * @throws InstantiationException * @throws IllegalAccessException * @throws InvocationTargetException * @see [類、類#方法、類#成員] */ @SuppressWarnings({"unchecked", "rawtypes"}) public static <T> T deepCopyBean(T source) { if (source == null) { return null; } try { if (source instanceof Collection) { return (T)deepCopyCollection((Collection)source); } if (source.getClass().isArray()) { return (T)deepCopyArray(source); } if (source instanceof Map) { return (T)deepCopyMap((Map)source); } if (source instanceof Date) { return (T)new Date(((Date)source).getTime()); } if (source instanceof Timestamp) { return (T)new Timestamp(((Timestamp)source).getTime()); } // 基本類型直接返回原值 if (source.getClass().isPrimitive() || source instanceof String || source instanceof Boolean || Number.class.isAssignableFrom(source.getClass())) { return source; } if (source instanceof StringBuilder) { return (T)new StringBuilder(source.toString()); } if (source instanceof StringBuffer) { return (T)new StringBuffer(source.toString()); } Object dest = source.getClass().newInstance(); BeanUtilsBean bean = BeanUtilsBean.getInstance(); PropertyDescriptor[] origDescriptors = bean.getPropertyUtils().getPropertyDescriptors(source); for (int i = 0; i < origDescriptors.length; i++) { String name = origDescriptors[i].getName(); if ("class".equals(name)) { continue; } if (bean.getPropertyUtils().isReadable(source, name) && bean.getPropertyUtils().isWriteable(dest, name)) { try { Object value = deepCopyBean(bean.getPropertyUtils().getSimpleProperty(source, name)); bean.getPropertyUtils().setSimpleProperty(dest, name, value); } catch (NoSuchMethodException e) { } } } return (T)dest; } catch (Exception e) { throw new RuntimeException(e); } } @SuppressWarnings({"rawtypes", "unchecked"}) private static Collection deepCopyCollection(Collection source) throws InstantiationException, IllegalAccessException { Collection dest = source.getClass().newInstance(); for (Object o : source) { dest.add(deepCopyBean(o)); } return dest; } private static Object deepCopyArray(Object source) throws InstantiationException, IllegalAccessException, ArrayIndexOutOfBoundsException, IllegalArgumentException { int length = Array.getLength(source); Object dest = Array.newInstance(source.getClass().getComponentType(), length); if (length == 0) { return dest; } for (int i = 0; i < length; i++) { Array.set(dest, i, deepCopyBean(Array.get(source, i))); } return dest; } @SuppressWarnings({"unchecked", "rawtypes"}) private static Map deepCopyMap(Map source) throws InstantiationException, IllegalAccessException { Map dest = source.getClass().newInstance(); for (Object o : source.entrySet()) { Entry e = (Entry)o; dest.put(deepCopyBean(e.getKey()), deepCopyBean(e.getValue())); } return dest; } } |
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