更新非空字段工具

public <T> void update(T src,T dest){
    Field[] srcFields = src.getClass().getDeclaredFields();
    for(int i = 0 ; i< srcFields.length ; i++){
       srcFields[i].setAccessible(true);
        try {
            Object value = srcFields[i].get(src);
            if(null!=value){
                srcFields[i].set(dest,value);
            }
            srcFields[i].setAccessible(false);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}