对象值的复制

 public static <T> T obj2Obj(Object origin, Class<T> clazz) {
        Gson gson = new Gson();
        if(origin == null) {
            return null;
        }
        return gson.fromJson(gson.toJson(origin), clazz);
    }
    
    //把一个list对象转成含有相同属性的另外一个list
    public static <C extends Collection<T>, T> C obj2List(Object origin, Class<T> type) {
        Gson gson = new Gson();

        if(origin == null) {
            return null;
        }
        
        Type[] argumentTypes = new Type[]{type};
        Type parameterizedType = ParameterizedTypeImpl.make(List.class, argumentTypes, null);
        return gson.fromJson(gson.toJson(origin), parameterizedType);
    }