src/com/xx/supermarket/pagehelper/Page.java

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package com.xx.supermarket.pagehelper;

import org.apache.ibatis.session.RowBounds;

import java.util.ArrayList;
import java.util.List;

/**
 * Mybatis - 分页对象
 *
 * @author liuzh/abel533/isea533
 * @version 3.3.0
 *          项目地址 : http://git.oschina.net/free/Mybatis_PageHelper
 */
public class Page<E> extends ArrayList<E> {
    private static final long serialVersionUID = 1L;

    /**不进行count查询*/
    private static final int NO_SQL_COUNT = -1;
    /**进行count查询*/
    private static final int SQL_COUNT = 0;
    /**页码，从1开始*/
    private int pageNum;
    /**页面大小*/
    private int pageSize;
    /**起始行*/
    private int startRow;
    /**末行*/
    private int endRow;
    /**总数*/
    private long total;
    /**总页数*/
    private int pages;
    /**分页合理化*/
    private boolean reasonable;

    public Page(){
    	super();
    }

    public Page(int pageNum, int pageSize) {
        this(pageNum, pageSize, SQL_COUNT);
    }

    public Page(int pageNum, int pageSize, boolean count) {
        this(pageNum, pageSize, count ? Page.SQL_COUNT : Page.NO_SQL_COUNT);
    }

    public Page(int pageNum, int pageSize, int total) {
        super(pageSize > -1 ? pageSize : 0);
        this.pageNum = pageNum;
        this.pageSize = pageSize;
        this.total = total;
        calculateStartAndEndRow();
    }

    public Page(RowBounds rowBounds, boolean count) {
        this(rowBounds, count ? Page.SQL_COUNT : Page.NO_SQL_COUNT);
    }