mybatis中和MP中关于拿到插入新数据的id解决方案

1.MP中:一般调用了save方法后,对应的bean已经有了id值,只需要直接get就行

 

@PostMapping("/selectPage")
public Result selectPage(Integer page, Integer size) {
   /* redisTemplate.opsForValue().set("gag","hahah");
    String gag = redisTemplate.opsForValue().get("gag");
    System.out.println(gag);
    QueryWrapper wrapper = new QueryWrapper<>();
    wrapper.select("name");
    List list1 = dictService.list(wrapper);
    System.out.println(list1);
    PageInfo> list = dictService.selectPage(page, size);*/
    Dict dict = new Dict();
    dict.setName("9999");
    dict.setDate(new Date());
    boolean save = dictService.save(dict);

    Long id = dict.getId();
    System.out.println(id);


    return Result.ok(id);
}

2.mybaits中得借助标签进行赋值

    
        select last_insert_id()
    
    insert into t_checkGroup (code,name,helpCode,sex,remark,attention)
    values(#{code},#{name},#{helpCode},#{sex},#{remark},#{attention})

2.1:在业务层中直接调用就行

@Override
@Transactional
public void add(CheckGroup checkGroup, Integer[] checkitemIds) {
    // 添加检查组
    checkGroupDao.add(checkGroup);
    // 获取检查组 id
    Integer checkGroupId = checkGroup.getId();
    // 遍历选中的检查项id
    if(null != checkitemIds) {
        for (Integer checkitemId : checkitemIds) {
            // 添加检查组与检查项的关系
            checkGroupDao.addCheckGroupCheckItem(checkGroupId, checkitemId);
        }
    }
}