lambdaquerywrapper修改语法
时间: 2023-09-20 15:10:28 浏览: 61
LambdaQueryWrapper的修改语法可以通过以下几种方式实现:
1. 可以使用QueryWrapper的lambda()方法来创建LambdaQueryWrapper对象,然后进行链式查询。例如:LambdaQueryWrapper<BannerItem> wrapper = new QueryWrapper<BannerItem>().lambda(); wrapper.eq(BannerItem::getBannerId, id); List<BannerItem> bannerItems = bannerItemMapper.selectList(wrapper);
2. 可以直接使用LambdaQueryWrapper的构造器来创建LambdaQueryWrapper对象,然后进行链式查询。例如:LambdaQueryWrapper<BannerItem> wrapper = new LambdaQueryWrapper<>(); wrapper.eq(BannerItem::getBannerId, id); List<BannerItem> bannerItems = bannerItemMapper.selectList(wrapper);
3. 还可以在QueryWrapper对象上使用lambda()方法,然后通过lambda()方法返回的LambdaQueryWrapper对象进行查询操作。例如:QueryWrapper<BannerItem> wrapper = new QueryWrapper<>(); wrapper.lambda().eq(BannerItem::getBannerId, id); List<BannerItem> bannerItems = bannerItemMapper.selectList(wrapper); <span class="em">1</span><span class="em">2</span><span class="em">3</span>
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