mybatis generator 生成的example类的使用方法

    @RequestMapping("/test")
    public String execute() {
        /* 先创建一个example */ 
        GoodsExample goodsExample = new GoodsExample();
        /* 然后创建criteria对象 */
        GoodsExample.Criteria criteria = goodsExample.createCriteria();
        criteria.andCategoryIdIsNotNull();
        List<Goods> goodses = goodsMapper.selectByExample(goodsExample);
        System.out.println(goodses);
        return "dd";
    }

 select * from shop_user where id is not null;