public UserInfo findUserInfoByIdAndName(int age, String name) throws Exception { if (StringUtils.isBlank(name)) { throw new Exception("名称不能为空"); } if (age < 0 || age > 120) { throw new Exception("年龄超出范围"); } UserInfoExample example = new UserInfoExample(); UserInfoExample.Criteria criteria = example.createCriteria(); criteria.andNameEqualTo(name); criteria.andAgeBetween(age - 10, age + 10); List<UserInfo> list = userInfoMapper.selectByExample(example); if (list == null || list.size() == 0) { throw new Exception("未找到符合条件的用户"); } return list.get(0); }优化代码

以下是对业务层代码的优化：

@Service
public class DeviceService {

    @Autowired
    private UserInfoMapper userInfoMapper;

    public UserInfo findUserInfoByIdAndName(int age, String name) throws Exception {
        if (StringUtils.isBlank(name)) {
            throw new IllegalArgumentException("名称不能为空");
        }
        if (age < 0 || age > 120) {
            throw new IllegalArgumentException("年龄超出范围");
        }
        UserInfoExample example = new UserInfoExample();
        UserInfoExample.Criteria criteria = example.createCriteria();
        criteria.andNameEqualTo(name);
        criteria.andAgeBetween(age - 10, age + 10);
        List<UserInfo> list = userInfoMapper.selectByExample(example);
        if (CollectionUtils.isEmpty(list)) {
            throw new NotFoundException("未找到符合条件的用户");
        }
        return list.get(0);
    }
}

这里使用了IllegalArgumentException和NotFoundException来替代Exception，使得代码更加规范。同时使用了CollectionUtils.isEmpty方法来判断list是否为空，代码更加简洁。