1，Java深copy

 /**
 * 深copy一个list对象
 * @param list
 * @return
 */public static <T> List<T> deepCopy2(List<T> list, Class cc) throws Exception{

    List<T> copy = new LinkedList();
    if (list == null || list.size() < 0){
        return copy;
    }
    for(T source : list){
        T  target = (T)cc.newInstance();
        BeanUtils.copyProperties(source, target);
        copy.add(target);
    }
    return copy;
}  

2，通过反射属性深copy一个对象进入list

 /**
 * 通过反射属性给list新增对象
 * @param list
 * @param c
 * @param <T>
 * @throws Exception
 */private <T> void addByField(List<T> list, Class c) throws Exception{
    T t = (T)c.newInstance();
    Field field = c.getDeclaredField("index");
    field.setAccessible(true);
    field.set(t, 100);
    list.add(t);
}  

3，通过反射方法copy一个对象进入list

 /**
 * 通过反射方法给list新增对象
 * @param list
 * @param c
 * @param <T>
 * @throws Exception
 */private <T> void addByMothod(List<T> list, Class c) throws Exception{
    T t = (T)c.newInstance();
    Method setIndex = c.getDeclaredMethod("setIndex",  Integer .class);
    setIndex.invoke(t, 1);
    list.add(t);
}