/**
* 拷贝属性到目标对象,如果为空不拷贝,目标对象属性有值,则不拷贝该属性
*
* @param source
* 待拷贝属性的对象
* @param target
* 目标对象
* @throws BeansException
*/
public static void copyPropertiesExclude(Object source, Object target) throws BeansException {
if (source == null || target == null) {
throw new RuntimeException("拷贝和被拷贝对象不能为空。");
}
Class<?> actualEditable = target.getClass();
PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);
for (PropertyDescriptor targetPd : targetPds) {
if (targetPd.getWriteMethod() != null) {
PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());
if (sourcePd != null && sourcePd.getReadMethod() != null) {
try {
Method readMethod = sourcePd.getReadMethod();
if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {
readMethod.setAccessible(true);
}
Object value = readMethod.invoke(source);
// 这里判断以下value是否为空 当然这里也能进行一些特殊要求的处理 例如绑定时格式转换等等
if (value != null) {
Method targetReadMethod = targetPd.getReadMethod();
if (!Modifier.isPublic(targetReadMethod.getDeclaringClass().getModifiers())) {
targetReadMethod.setAccessible(true);
}
Object targetValue = targetReadMethod.invoke(target);
Method writeMethod = targetPd.getWriteMethod();
if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {
writeMethod.setAccessible(true);
}
if(targetValue!=null && !StringUtils.isEmpty(targetValue.toString()) && !"[]".equals(targetValue.toString())){
continue;
}
writeMethod.invoke(target, value);
}
} catch (Throwable ex) {
throw new FatalBeanException("Could not copy properties from source to target", ex);
}
}
}
}
}本文出自 “BrightAries” 博客,谢绝转载!
原文:http://brightaries.blog.51cto.com/13167995/1982362