MyBatisPlus（九）模糊查询

说明

模糊查询，对应SQL语句中的 like 语句，模糊匹配“要查询的内容”。

like

    /**
     * 查询用户列表， 查询条件：姓名包含 "J"
     */
    @Test
    void like() {
        String name = "J";
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.like(StringUtils.hasText(name), User::getName, name);
        List<User> users = mapper.selectList(wrapper);
        log.info(users.toString());
    }

notLike

    /**
     * 查询用户列表， 查询条件：姓名不包含 "J"
     */
    @Test
    void notLike() {
        String name = "J";
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.notLike(StringUtils.hasText(name), User::getName, name);
        List<User> users = mapper.selectList(wrapper);
        log.info(users.toString());
    }

likeLeft

    /**
     * 查询用户列表， 查询条件：左模糊查询，姓名以 "e" 结尾
     */
    @Test
    void likeLeft() {
        String name = "e";
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.likeLeft(StringUtils.hasText(name), User::getName, name);
        List<User> users = mapper.selectList(wrapper);
        log.info(users.toString());
    }

likeRight

    /**
     * 查询用户列表， 查询条件：右模糊查询，姓名以 "张" 开头
     */
    @Test
    void likeRight() {
        String name = "张";
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.likeRight(StringUtils.hasText(name), User::getName, name);
        List<User> users = mapper.selectList(wrapper);
        log.info(users.toString());
    }

notLikeLeft

    /**
     * 查询用户列表， 查询条件：左模糊查询，姓名不以 "e" 结尾
     */
    @Test
    void notLikeLeft() {
        String name = "e";
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.notLikeLeft(StringUtils.hasText(name), User::getName, name);
        List<User> users = mapper.selectList(wrapper);
        log.info(users.toString());
    }

notLikeRight

    /**
     * 查询用户列表， 查询条件：右模糊查询，姓名不以 "张" 开头
     */
    @Test
    void notLikeRight() {
        String name = "张";
        LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
        wrapper.notLikeRight(StringUtils.hasText(name), User::getName, name);
        List<User> users = mapper.selectList(wrapper);
        log.info(users.toString());
    }