空值处理

xufenglei

2018-07-20 d8680e96da9c51f22fae430fc493f110cb374e5b

 src/main/java/com/moral/service/impl/AreaServiceImpl.java

@@ -3,9 +3,13 @@
import com.moral.entity.Area;
import com.moral.entity.City;
import com.moral.entity.Province;
import com.moral.entity.Town;
import com.moral.entity.Village;
import com.moral.mapper.AreaMapper;
import com.moral.mapper.CityMapper;
import com.moral.mapper.ProvinceMapper;
import com.moral.mapper.TownMapper;
import com.moral.mapper.VillageMapper;
import com.moral.service.AreaService;
import org.springframework.stereotype.Service;
import tk.mybatis.mapper.entity.Example;
@@ -22,6 +26,12 @@
    CityMapper cityMapper;
    @Resource
    AreaMapper areaMapper;

    @Resource
    private TownMapper townMapper;
    
    @Resource
    private VillageMapper villageMapper;

    @Override
    public List<Province> getProvinces() {
@@ -75,4 +85,18 @@
        }
        return fullName;
    }

   @Override
   public List<Town> getTowns(Integer areaCode) {
        Example example = new Example(Town.class);
        example.or().andEqualTo("areaCode",areaCode);
        return townMapper.selectByExample(example);
   }

   @Override
   public List<Village> getVillages(Long townCode) {
        Example example = new Example(Village.class);
        example.createCriteria().andEqualTo("townCode",townCode);
        return villageMapper.selectByExample(example);
   }
}