cloner.java

来自「一个可以存储和打印成绩单的系统」· Java 代码 · 共 48 行

package org.minjey.cjsjk.util;

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

public class Cloner {
	public static Object clone(Object obj) {
		Object nobj = null;
		try {
			Reflector reflector = new Reflector();
			Class cla = obj.getClass();
			nobj = cla.getConstructor(null).newInstance(null);
			Field[] fields = cla.getDeclaredFields();
			String fname = null;
			for(Field field : fields) {
				fname = field.getName();
				Object value = reflector.getValue(obj, fname);
				if(value != null) {
					reflector.setValue(nobj, fname, new Object[]{value});
				}
			}
			cla = cla.getSuperclass();
			fields = cla.getDeclaredFields();
			for(Field field : fields) {
				fname = field.getName();
				Object value = reflector.getValue(obj, fname);
				if(value != null) {
					reflector.setValue(nobj, fname, new Object[]{value});
				}
			}
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		}
		return nobj;
	}
}