Example之selectOneByExample方法和selectByExample的使用

selectOneByExample示例如下：

Example userExample = new Example(User.class);
userExample.createCriteria().andEqualTo("userName",traceabilitySlice.getCreateBy()).andEqualTo("delFlag",0);
User sendUser = userMapper.selectOneByExample(userExample);

selectByExample使用示例如下：

Example example = new Example(User.class);
example.createCriteria().andEqualTo("userName", user.getUserName());
List<User> list = userMapper.selectByExample(example);

Example添加查询条件时，除了使用andEqualTo外，还可设置字段降序和日期范围查询：

Example example = new Example(OfficialAccout.class);
//设置排序，STAT_DATE字段为降序
example.setOrderByClause("STAT_DATE ASC");
example.createCriteria().andBetween("statDate", last, now);
List<OfficialAccout> list = officialAccoutMapper.selectByExample(example);

设置字段升序或降序的另一种方法：

Example example = new Example(IntelDrugStore.class);
example.orderBy("createTime").desc().orderBy("updateTime").desc();

andBetween的使用

Example example = new Example(PlantGrowIrrigation.class);
Example.Criteria criteria = example.createCriteria();
criteria.andEqualTo("plantGrowId", plantGrowId).andBetween("irrigationDate", DateUtil.parse(startDate), DateUtil.parse(endDate));
List<PlantGrowIrrigation> list = plantGrowIrrigationMapper.selectByExample(example);