springboot 集成pageHelper插件分页

<!--分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.0.0</version>
</dependency>

@Service
public class NewServiceImpl implements NewService{
@Autowired
private NewMapper newMapper;

@Override
public List<New> queryListByOption(Map<String, Object> map) {

int pageNum = 1;
int pageSize = 10;
if(!StringUtil.isEmpty(map.get("pageNum").toString()) && !StringUtil.isEmpty(map.get("pageSize").toString())){
pageNum = Integer.parseInt(map.get("pageNum").toString());
pageSize = Integer.parseInt(map.get("pageSize").toString());
}
PageHelper.startPage(pageNum, pageSize);
return newMapper.queryListByOption(map);
}

}