分页辅助类

最新推荐文章于 2024-04-26 11:26:20 发布

转载最新推荐文章于 2024-04-26 11:26:20 发布 · 129 阅读

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原文链接：https://my.oschina.net/chendongj/blog/838381

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#python

本文介绍了一个实用的Java分页工具类实现方法，通过该工具类可以方便地创建分页信息对象，包括每页显示的记录数、总记录数、总页数等关键属性，并提供了获取当前页、起始位置及是否存在上下页等功能。

2019独角兽企业重金招聘Python工程师标准>>>

package com.sanqing.util;
/*
 * 分页信息辅助类
 */
public class PageUtil {
	public static Page createPage(int everyPage,int totalCount,int currentPage) {//创建分页信息对象
		everyPage = getEveryPage(everyPage);
		currentPage = getCurrentPage(currentPage);
		int totalPage = getTotalPage(everyPage, totalCount);
		int beginIndex = getBeginIndex(everyPage, currentPage);
		boolean hasPrePage = getHasPrePage(currentPage);
		boolean hasNextPage = getHasNextPage(totalPage, currentPage);
		return new Page(everyPage, totalCount, totalPage, currentPage,
				beginIndex, hasPrePage,  hasNextPage);
	}
	public static int getEveryPage(int everyPage) {		//获得每页显示记录数
		return everyPage == 0 ? 10 : everyPage;
	}
	public static int getCurrentPage(int currentPage) {	//获得当前页
		return currentPage == 0 ? 1 : currentPage;
	}
	public static int getTotalPage(int everyPage,int totalCount) {//获得总页数
		int totalPage = 0;
		if(totalCount != 0 &&totalCount % everyPage == 0) {
			totalPage = totalCount / everyPage;
		} else {
			totalPage = totalCount / everyPage + 1;
		}
		return totalPage;
	}
	public static int getBeginIndex(int everyPage,int currentPage) {//获得起始位置
		return (currentPage - 1) * everyPage;
	}
	public static boolean getHasPrePage(int currentPage) {//获得是否有上一页
		return currentPage == 1 ? false : true;
	}
	public static boolean getHasNextPage(int totalPage, int currentPage) {	//获得是否有上一页
		return currentPage == totalPage || totalPage == 0 ? false : true;
	}
}

package com.sanqing.util;
public class Page {
	private int everyPage;			//每页显示记录数
	private int totalCount;			//总记录数
	private int totalPage;			//总页数
	private int currentPage;		//当前页
	private int beginIndex;			//查询起始点
	private boolean hasPrePage;		//是否有上一页
	private boolean hasNextPage;	//是否有下一页
	public Page(int everyPage, int totalCount, int totalPage, 
			int currentPage,int beginIndex, boolean hasPrePage,
			boolean hasNextPage) {	//自定义构造方法
		this.everyPage = everyPage;
		this.totalCount = totalCount;
		this.totalPage = totalPage;
		this.currentPage = currentPage;
		this.beginIndex = beginIndex;
		this.hasPrePage = hasPrePage;
		this.hasNextPage = hasNextPage;
	}
	public Page(){}					//默认构造函数
	public int getEveryPage() {		//获得每页显示记录数
		return everyPage;
	}
	public void setEveryPage(int everyPage) {//设置每页显示记录数
		this.everyPage = everyPage;
	}
	public int getTotalCount() {//获得总记录数
		return totalCount;
	}
	public void setTotalCount(int totalCount) {//设置总记录数
		this.totalCount = totalCount;
	}
	public int getTotalPage() {//获得总页数
		return totalPage;
	}
	public void setTotalPage(int totalPage) {//设置总页数
		this.totalPage = totalPage;
	}
	public int getCurrentPage() {//获得当前页
		return currentPage;
	}
	public void setCurrentPage(int currentPage) {//设置当前页
		this.currentPage = currentPage;
	}
	public int getBeginIndex() {//获得查询起始点
		return beginIndex;
	}
	public void setBeginIndex(int beginIndex) {//设置查询起始点
		this.beginIndex = beginIndex;
	}
	public boolean isHasPrePage() {//获得是否有上一页
		return hasPrePage;
	}
	public void setHasPrePage(boolean hasPrePage) {//设置是否有上一页
		this.hasPrePage = hasPrePage;
	}
	public boolean isHasNextPage() {//获得是否有下一页
		return hasNextPage;
	}
	public void setHasNextPage(boolean hasNextPage) {//设置是否有下一页
		this.hasNextPage = hasNextPage;
	}
}

转载于:https://my.oschina.net/chendongj/blog/838381