数据分页的相关操作

package www.csdn.net.news.util;

public class Pagination {

	// 分页的封装
	private int pageSize;
	private int countPage;
	private int nowPage;
	private int startIndex = 0;

	public Pagination(int countPage, int nowPage,int pageSize) {
		this.pageSize=pageSize;
		this.countPage = countPage;
		this.nowPage = nowPage;
		init();
	}

	private void init() {
		// 判断当前页是否合法
		if (nowPage <= 1) {
			this.nowPage = 1;
		} else if (nowPage >= countPage) {
			this.nowPage = countPage;
		} else {
			this.nowPage = nowPage;
		}
		this.startIndex = (this.nowPage - 1) * pageSize;
	}

	public int getNowPage() {
		return nowPage;
	}

	public void setNowPage(int nowPage) {
		this.nowPage = nowPage;
		init();
	}

	public int getPageSize() {
		return pageSize;
	}

	public int getCountPage() {
		return countPage;
	}

	public int getStartIndex() {
		return startIndex;
	}

	
}