pagination.java

动态网站管理发布系统

package com.ntsky.common;

import com.ntsky.persistence.*;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;

public class Pagination {

	private String strPage;

	private int curPages;

	private int m_rows;

	private int pages;

	public Pagination() {
		strPage = null;
	}

	public String strPage(HttpServletRequest request, String page) {
		try {
			strPage = request.getParameter(page);
		} catch (Exception e) {
			System.out.println("delcolumn" + e.getMessage());
		}
		return strPage;
	}

	public int curPages(String strPage) {
		try {
			if (strPage == null) {
				curPages = 1;
			} else {
				curPages = Integer.parseInt(strPage);
				if (curPages < 1)
					curPages = 1;
			}
		} catch (Exception e) {
			System.out.print("curPages");
		}
		return curPages;
	}

	public void setRows(int rows) {
		m_rows = rows;
	}

	public int getPages(int rowcounts) {
		int test = rowcounts % m_rows;
		if (test == 0)
			pages = rowcounts / m_rows;
		else
			pages = rowcounts / m_rows + 1;
		return pages;
	}

	public Iterator getPageSet(Iterator rs, int curPages) {
		int i;
		if (curPages == 1)
			return rs;
		i = 1;
		try {
			while (rs.hasNext()) {
				NEWSTable tableNews = (NEWSTable) rs.next();
				i++;
				if (i > (curPages - 1) * m_rows)break;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return rs;
	}

	public Iterator getPageSetNote(Iterator rs, int curPages) {
		int i = 1;
		if (curPages == 1)return rs;
		try {
			while (rs.hasNext()) {
				NOTEGuest tableNote = (NOTEGuest) rs.next();
				i++;
				if (i > (curPages - 1) * m_rows)break;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return rs;
	}
	public Iterator getPageSetClass(Iterator rs, int curPages) {
		int i = 1;
		if (curPages == 1)
			return rs;
		try {
			while (rs.hasNext()) {
				NEWSClass tableUsr = (NEWSClass) rs.next();
				i++;
				if (i > (curPages - 1) * m_rows)break;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return rs;
	}
	public Iterator getPageSetUsr(Iterator rs, int curPages) {
		int i = 1;
		if (curPages == 1)
			return rs;
		try {
			while (rs.hasNext()) {
				NEWSUsr tableUsr = (NEWSUsr) rs.next();
				i++;
				if (i > (curPages - 1) * m_rows)break;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return rs;
	}
}