使用LambdaQueryWrapper ,若修改实体类字段名,IDE会提示重构所有引用 QueryWrapper 使用的字符串不会自动跟随类字段变更而更新 2 使用示例 QueryWrapper 用法: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ounter(lineounter(lineounter(lineounter(lineQueryWrapper
*/wrapper.eq("实体类::查询字段","条件值");//相当于where条件wrapper.between("实体类::查询字段","区间一","区间二");//相当于范围内使用的betweenwrapper.like("实体类::查询字段","模糊查询的字符");//模糊查询likewrapper.groupBy("实体类::查询字段");//相当于group by分组wrapper.in("实体类:...
@Test public void testQueryWrapper8() { LambdaQueryWrapper<User> wrapper = Wrappers.lambdaQuery(); wrapper.select(User::getId,User::getName); wrapper.like(User::getName,"悟").eq(User::getEmail,"aa@qq.com"); List<User> userList = userMapper.selectList(wrapper); userList.forEach(System...
QueryChainWrapper 是 MyBatis-Plus 提供的一个链式查询工具,可以简化复杂查询的编写。例如: QueryChainWrapper<User> wrapper = new QueryChainWrapper<>(userMapper); wrapper.select("id", "name", "age") .eq("gender", "male") .between("age", 20, 30) .inSql("city", "select city from city_...
利用mybatis 的 collection 标签,可以在每次查询文章主体同时通过 queryparaminstancelist 级联查询出关联表数据。 <resultMap id="BaseResultMap" type="com.unicom.portal.pcm.entity.ArticleEntity"> <id column="id" jdbcType="BIGINT" property="id"/> ...
*/wrapper.eq("实体类::查询字段","条件值");//相当于where条件wrapper.between("实体类::查询字段","区间一","区间二");//相当于范围内使用的betweenwrapper.like("实体类::查询字段","模糊查询的字符");//模糊查询likewrapper.groupBy("实体类::查询字段");//相当于group by分组wrapper.in("实体类:...
// 使用LambdaQueryChainWrapper进行连表查询List<User>userList=newLambdaQueryChainWrapper<>(userMapper).eq(User::getUsername,"admin").ge(User::getAge,18).orderByDesc(User::getCreateTime).list(); 1. 2. 3. 4. 5. 6. 在这个示例中,我们直接使用了LambdaQueryChainWrapper进行连表查询,省去了创建...
LambdaQueryWrapper<Xuqiu> xuqiuwrapper = Wrappers.<Xuqiu>lambdaQuery(); xuqiuwrapper.isNull(Xuqiu::getPaiqiyuefen); xuqiuwrapper.orderByDesc(Xuqiu::getYouxianji,Xuqiu::getZhongyaochengdu,Xuqiu::getGongzuoliang); List<Xuqiu> xuqius = xuqiuMapper.selectList(xuqiuwrapper);...
LambdaQueryWrapper<User> userWrapper = Wrappers.<User>lambdaQuery().ge(User::getAge, 30);LambdaQueryWrapper<Order> orderWrapper = Wrappers.<Order>lambdaQuery().inSql(Order::getUserId, "SELECT id FROM user", userWrapper);List<Order> orderList = orderDao.selectList(orderWrapper); ...
使用LambdaQueryChainWrapper链式条件构造器构造条件,然后传给getOne方法去查询 重现步骤(如果有就写完整) @test void testWrapper(){ LambdaQueryWrapper queryWrapper = new LambdaQueryWrapper<>(); queryWrapper.eq(User::getId, 1650769863515734018L); System.out.println(userManagerImpl.getOne(queryWrapper)); Lambda...