import java.beans.PropertyDescriptor;import java.lang.reflect.InvocationTargetException;import java.util.Map;import org.apache.commons.beanutils.BeanUtils;import org.apache.commons.beanutils.PropertyUtils;public class CopyBean { /**      * 比较一个对象，如是这个对象的某一个属性不为空，把他copy到另一个有这个属性的bean中      *       * @param result 要copy到的bean      * @param orig 原来BEAN      * @throws InvocationTargetException      * @throws IllegalAccessException      */      public static void copyOrigNotNullPropertyToDestBean(Object result, Object orig) throws IllegalAccessException,              InvocationTargetException {          // Validate existence of the specified beans          if (result == null) {              throw new IllegalArgumentException("No destination bean specified");          }          if (orig == null) {              throw new IllegalArgumentException("No origin bean specified");          }                    if (orig instanceof Map) {              throw new IllegalArgumentException("No support map");          }            /* if (orig is a standard JavaBean) */          PropertyDescriptor origDescriptors[] = PropertyUtils.getPropertyDescriptors(orig);          for (int i = 0; i < origDescriptors.length; i++) {              String name = origDescriptors[i].getName();              if ("class".equals(name)) {                  continue; // No point in trying to set an object's class              }              if (PropertyUtils.isReadable(orig, name) && PropertyUtils.isWriteable(result, name)) {                  try {                      Object value1 = PropertyUtils.getSimpleProperty(orig, name);                      if (value1 != null) {                           if (PropertyUtils.isReadable(result, name) && PropertyUtils.isWriteable(result, name)) {                               BeanUtils.copyProperty(result, name, value1);                           }                      }                  } catch (NoSuchMethodException e) {                  }              }          }        } }