/**
* 从一个对象提取另一个类型的值, 如: 从TransportOrderQe中提取父类TransportOrder, 以便送到服务器进行hibernate的持久化.
*
* @param fromObj
* @param toClass
* @return
*/
public static Object extractObject(Object fromObj, Class toClass)
throws InstantiationException, IllegalAccessException {
if (fromObj == null || toClass == null) {
return null;
}
Collection getters = ObjectUtil.getGetters(toClass);
Object toObj = toClass.newInstance();
for (Iterator iterator = getters.iterator(); iterator.hasNext(); ) {
Method getter = (Method) iterator.next();
String propertyName = ObjectUtil.getPropertyName(getter.getName());
getter = getGetter(fromObj.getClass(), propertyName);
try {
// System.out.println(">>>prop name: " + propertyName + ", getter: " + getter);
Method setter =
toClass.getMethod(
ObjectUtil.getSetterMethodName(propertyName), new Class[] {getter.getReturnType()});
Object getterResult = getter.invoke(fromObj, new Object[0]);
setter.invoke(toObj, new Object[] {getterResult});
} catch (NoSuchMethodException ex) {
continue;
} catch (IllegalAccessException ex) {
continue;
} catch (InvocationTargetException ex) {
continue;
}
}
return toObj;
}
public static void copyFields(Object from, Object to) {
Collection getters = ObjectUtil.getGetters(from.getClass());
for (Iterator iterator = getters.iterator(); iterator.hasNext(); ) {
Method getter = (Method) iterator.next();
String propertyName = ObjectUtil.getPropertyName(getter.getName());
try {
Method setter =
to.getClass()
.getMethod(
ObjectUtil.getSetterMethodName(propertyName),
new Class[] {getter.getReturnType()});
Object getterResult = getter.invoke(from, new Object[0]);
setter.invoke(to, new Object[] {getterResult});
} catch (NoSuchMethodException ex) {
continue;
} catch (IllegalAccessException ex) {
continue;
} catch (InvocationTargetException ex) {
continue;
}
}
}
/** --------- 将所有的字段设为null ------------ */
public static void emptyFields(Object obj) {
Collection setters = ObjectUtil.getSetters(obj.getClass());
for (Iterator iterator = setters.iterator(); iterator.hasNext(); ) {
Method setter = (Method) iterator.next();
try {
Class[] paramCls = setter.getParameterTypes();
if (paramCls[0] == boolean.class) {
//
setter.invoke(obj, new Object[] {Boolean.FALSE});
} else {
setter.invoke(obj, new Object[] {null});
}
} catch (IllegalAccessException ex) {
continue;
} catch (InvocationTargetException ex) {
continue;
}
}
}