package com.ruoyi.common.core.domain;
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import cn.hutool.core.util.ObjectUtil;
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import com.baomidou.mybatisplus.core.metadata.OrderItem;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.ruoyi.common.utils.StringUtils;
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import com.ruoyi.common.utils.sql.SqlUtil;
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import lombok.Data;
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import java.io.Serializable;
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/**
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* 分页查询实体类
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*
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* @author Lion Li
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*/
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@Data
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public class PageQuery implements Serializable {
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private static final long serialVersionUID = 1L;
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/**
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* 分页大小
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*/
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private Integer pageSize;
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/**
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* 当前页数
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*/
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private Integer pageNum;
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/**
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* 排序列
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*/
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private String orderByColumn;
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/**
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* 排序的方向desc或者asc
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*/
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private String isAsc;
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/**
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* 当前记录起始索引 默认值
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*/
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public static final int DEFAULT_PAGE_NUM = 1;
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/**
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* 每页显示记录数 默认值 默认查全部
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*/
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public static final int DEFAULT_PAGE_SIZE = Integer.MAX_VALUE;
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public <T> Page<T> build() {
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Integer pageNum = ObjectUtil.defaultIfNull(getPageNum(), DEFAULT_PAGE_NUM);
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Integer pageSize = ObjectUtil.defaultIfNull(getPageSize(), DEFAULT_PAGE_SIZE);
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if (pageNum <= 0) {
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pageNum = DEFAULT_PAGE_NUM;
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}
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Page<T> page = new Page<>(pageNum, pageSize);
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OrderItem orderItem = buildOrderItem();
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if (ObjectUtil.isNotNull(orderItem)) {
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page.addOrder(orderItem);
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}
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return page;
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}
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private OrderItem buildOrderItem() {
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// 兼容前端排序类型
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if ("ascending".equals(isAsc)) {
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isAsc = "asc";
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} else if ("descending".equals(isAsc)) {
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isAsc = "desc";
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}
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if (StringUtils.isNotBlank(orderByColumn)) {
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String orderBy = SqlUtil.escapeOrderBySql(orderByColumn);
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orderBy = StringUtils.toUnderScoreCase(orderBy);
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if ("asc".equals(isAsc)) {
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return OrderItem.asc(orderBy);
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} else if ("desc".equals(isAsc)) {
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return OrderItem.desc(orderBy);
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}
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}
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return null;
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}
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}
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