GraduationDesign/errand/springboot/src/main/java/com/example/service/OrdersService.java

package com.example.service;

import cn.hutool.core.date.DateUnit;
import cn.hutool.core.date.DateUtil;
import com.example.entity.Orders;
import com.example.mapper.OrdersMapper;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.util.Date;
import java.util.List;

/**
 * 订单信息业务处理
 **/
@Service
public class OrdersService {

    @Resource
    private OrdersMapper ordersMapper;


    /**
     * 新增
     */
    public void add(Orders orders) {
        ordersMapper.insert(orders);
    }

    /**
     * 删除
     */
    public void deleteById(Integer id) {
        ordersMapper.deleteById(id);
    }

    /**
     * 批量删除
     */
    public void deleteBatch(List<Integer> ids) {
        for (Integer id : ids) {
            ordersMapper.deleteById(id);
        }
    }

    /**
     * 修改
     */
    public void updateById(Orders orders) {
        ordersMapper.updateById(orders);
    }

    /**
     * 根据ID查询
     */
    public Orders selectById(Integer id) {
        return ordersMapper.selectById(id);
    }

    /**
     * 查询所有
     */
    public List<Orders> selectAll(Orders orders) {
        List<Orders> ordersList = ordersMapper.selectAll(orders);
        for (Orders o : ordersList) {
            String time = o.getTime();
            Date date = new Date();
            int range = (int) DateUtil.between(DateUtil.parseDateTime(time), date, DateUnit.MINUTE);
            o.setRange(range);
        }
        return ordersList;
    }

    /**
     * 分页查询
     */
    public PageInfo<Orders> selectPage(Orders orders, Integer pageNum, Integer pageSize) {
        PageHelper.startPage(pageNum, pageSize);
        List<Orders> list = ordersMapper.selectAll(orders);
        return PageInfo.of(list);
    }

}