pageHelper怎么分页

  <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.12</version>
        </dependency>

/**
     * 线下还款处理搜索分页列表(财务管理模块)
     */
    @Override
    public PageResult<RepayDto> queryOfflineRepay(String searchKey, Date repayTimeStart, Date repayTimeEnd, Integer pageNum, Integer pageSize) {
        PageHelper.startPage(pageNum, pageSize, true);
        List<RepayDto> repayDtoList = repayDao.queryOfflineRepay(searchKey, repayTimeStart, repayTimeEnd);
        //翻译逾期状态 和账单状态
        for (RepayDto repayDao : repayDtoList){
            if(repayDao.getOverdueStatus() != null){
                repayDao.setOverdueStatusName(RepayConstants.getDictName(repayDao.getOverdueStatus()));
            }
            if(repayDao.getRepayStatus() != null){
                repayDao.setRepayStatusName(RepayConstants.getDictName(repayDao.getRepayStatus()));
            }
        }
        Long total = ((Page) repayDtoList).getTotal();
        //添加其他两个字段
        Map<String, Object> otherMap = repayDao.queryOtherData(searchKey, repayTimeStart, repayTimeEnd);
        //封装最后结果返回
        PageResult<RepayDto> result = new PageResult<>(repayDtoList, total, pageNum, pageSize);
        result.setOtherDatas(otherMap);
        return result;
    }```

```java
package com.i78dk.saascommon.common.sys;

import lombok.Data;

import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**

  * description:   某些模块分页字段不一样，将用到的分页字段都放在这兼容
  */
@Data
public class PageResult<T> implements Serializable {

    /**
     * 数据
     */
    private List<T> dataList;

    /**
     * 当前页
     */
    private Integer pageNo;

    /**
     * 每页多少记录数
     */
    private Integer pageSize;

    /**
     * 总记录数
     */
    private Long totalCount;

    /**
     * 页码总数
     */
    private Integer totalPage;

    /**
     * 其它附加数据，有些功能需要在列表外添加一些附加数据，这样可以省去一些自定义对象
     */
    private Map<String, Object> otherDatas;

    /**
     * Description: 添加附加数据
     */
    public void setOtherData(String key, Object value) {
        if (otherDatas == null) {
            otherDatas = new HashMap<>();
        }
        otherDatas.put(key, value);
    }


    public PageResult(){

    }




    /**
     * 自定义分页使用
     * @param list list
     * @param count count
     * @param pageNo pageNo
     * @param pageSize pageSize
     */
    public PageResult(List<T> list, Long count, Integer pageNo, Integer pageSize){
        // 都是数据
        // 深拷贝，避免json的循环引用检测
        this.dataList = list;
        // 都是总记录数
        this.totalCount = count;
        // 都是当前页
        this.pageNo = pageNo;

        int totalPages = (int)(count / pageSize);
        totalPages = count % pageSize > 0 ? totalPages + 1 : totalPages;
        this.totalPage = totalPages;

        this.pageSize = pageSize;
    }
}

 <!-- 线下还款处理搜索分页列表(财务管理模块) -->
    <select id="queryOfflineRepay" resultType="com.i78dk.saasfinancecloud.inter.dto.RepayDto">
        SELECT
        u.user_name loanUserName,
        fbr.id id,
        fbr.bill_id billId,
        fbr.order_id orderId,
        m.merchant_name merchantName,
        cgb.`name` productCategoryName,
        o.audit_money loanAmount,
        fbb.bill_number billNumber,
        fbb.period billPeriod,
        fbb.principal principal,
        fbb.interest interest,
        fbb.add_amount addAmount,
        fbb.overdue_fee overdueFee,
        <!--总计应还=每期本金+每期利息+本期平台服务费+逾期手续费 -->
        CEIL(fbb.principal+fbb.interest+fbb.add_amount+fbb.overdue_fee) shouldPay,
        fbb.status_overdue overdueStatus,
        fbb.status_repay repayStatus,
        fbr.create_time createTime
        FROM fc_bm_repay fbr
        left  join `order` o on fbr.order_id = o.id
        left  join  order_extend oe on o.id = oe.order_id
        left  join  merchant m  on o.merchant_id = m.id
        left  join `user` u on o.user_id = u.id
        left  join  cp_goods_baseinfo  cgb on  oe.goods_id = cgb.id
        left  join  fc_bm_bill fbb on  o.id = fbb.order_id
        where fbr.repay_type = 'offline'
        <if test = "searchKey != null and searchKey != '' ">
            AND (o.order_no = #{searchKey} OR u.real_name = #{searchKey} OR u.mobile = #{searchKey})
        </if>
        <if test = "repayTimeStart != null">
            AND fbr.repay_time <![CDATA[ >= ]]> DATE_FORMAT(#{repayTimeStart},'%Y-%m-%d')
        </if>
        <if test = "repayTimeEnd != null">
            AND fbr.repay_time <![CDATA[ <= ]]> DATE_FORMAT(#{repayTimeEnd},'%Y-%m-%d')
        </if>
        ORDER BY fbr.repay_time DESC
    </select>

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