src/com/sanqing/util/PageUtil.java

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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;
	}
}