java分页显示类下载

package page.bean; import java.util.*; /** * <p>Title: PageResultSet</p> * <p>Description:分页类 </p> * <p>Copyright: Copyright (c) 2004</p> * <p>Company:youngor-studio(http://www.54youngor.com) </p> * @author:伍维波 * @version 1.0 */ public class PageResultSet { /** * 分页数据 */ private Collection data = null; /** * 当前页 */ private int curPage; /** * 每页显示的记录数 */ private int pageSize; /** * 记录行数 */ private int rowsCount; /** * 页数 */ private int pageCount; public PageResultSet(Collection data) { this.data = data; this.curPage = 1; this.pageSize = 10; this.rowsCount = data.size(); this.pageCount = (int) Math.ceil((double) rowsCount / pageSize); } public PageResultSet(Collection data, int curPage) { this.data = data; this.curPage = curPage; this.pageSize = 10; this.rowsCount = data.size(); this.pageCount = (int) Math.ceil((double) rowsCount / pageSize); } public PageResultSet(Collection data, int curPage, int pageSize) { this.data = data; this.curPage = curPage; this.pageSize = pageSize; this.rowsCount = data.size(); this.pageCount = (int) Math.ceil((double) rowsCount / pageSize); } /** * getCurPage:返回当前的页数 * * @return int */ public int getCurPage() { return curPage; } /** * getPageSize：返回分页大小 * * @return int */ public int getPageSize() { return pageSize; } /** * getRowsCount：返回总记录行数 * * @return int */ public int getRowsCount() { return rowsCount; } /** * getPageCount：返回总页数 * * @return int */ public int getPageCount() { return pageCount; } /** * 第一页 * * @return int */ public int first() { return 1; } /** * 最后一页 * * @return int */ public int last() { return pageCount; } /** * 上一页 * * @return int */ public int previous() { return (curPage - 1 < 1) ? 1 : curPage - 1; } /** * 下一页 * * @return int */ public int next() { return (curPage + 1 > pageCount) ? pageCount : curPage + 1; } /** * 第一页 * * @return boolean */ public boolean isFirst() { return (curPage == 1) ? true : false; } /** * 最后一页 * * @return boolean */ public boolean isLast() { return (curPage == pageCount) ? true : false; } /** * 获取当前页数据 * * @return Collection */ public Collection getData() { Collection curData = null; if (data != null) { int start = (curPage - 1) * pageSize; int end = 0; if (start + pageSize > rowsCount) end = rowsCount; else end = start + pageSize; ArrayList arrayCurData = new ArrayList(); ArrayList arrayData = null; Vector vectorCurData = new Vector(); Vector vectorData = null; boolean isArray = true; if (data instanceof ArrayList) { arrayData = (ArrayList) data; isArray = true; } else if (data instanceof Vector) { vectorData = (Vector) data; isArray = false; } for (int i = start; i < end; i++) { if (isArray) { arrayCurData.add(arrayData.get(i)); } else { vectorData.add(vectorData.elementAt(i)); } } if (isArray) { curData = (Collection) arrayCurData; } else { curData = (Collection) vectorCurData; } } return curData; } /** * 获取工具条 * * @return String */ public String getToolBar(String fileName) { String temp = ""; if (fileName.indexOf("?") == -1) { temp = "?"; } else { temp = "&"; } String str = "<html:form method='post' name='frmPage' action='" + fileName + "'>"; str += "<p align='center'>"; if (isFirst()) str += "首页 上一页&nbsp;"; else { str += "<a href='" + fileName + temp + "cur_page=1'>首页</a>&nbsp;"; str += "<a href='" + fileName + temp + "cur_page=" + (curPage - 1) + "'>上一页</a>&nbsp;"; } if (isLast()) str += "下一页 尾页&nbsp;"; else { str += "<a href='" + fileName + temp + "cur_page=" + (curPage + 1) + "'>下一页</a>&nbsp;"; str += "<a href='" + fileName + temp + "cur_page=" + pageCount + "'>尾页</a>&nbsp;"; } str += "&nbsp;共<b>" + rowsCount + "</b>条记录&nbsp;"; str += "&nbsp;转到<html:select name='page' onChange=\"location='" + fileName + temp + "cur_page='+this.options[this.selectedIndex].value\">"; for (int i = 1; i <= pageCount; i++) { if (i == curPage) str += "<html:option value='" + i + "' selected>第" + i + "页</html:option>"; else str += "<html:option value='" + i + "'>第" + i + "页</html:option>"; } str += "</html:select></p></html:form>"; return str; } }