java 通用分页组件 实例 源码

//PageResultSet.java package com.ipi.lncmcc.util; import java.util.*; 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) { System.out.println("------------------z"); this.data = data; this.curPage = 1; this.pageSize = 10; this.rowsCount = data.size(); this.pageCount = (int) Math.ceil((double) rowsCount / pageSize); System.out.println("------------------z"+data); } 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; } /** * 第一页 * @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="<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<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+="<option value='"+i+"' selected>第"+i+"页</option>"; else str+="<option value='"+i+"'>第"+i+"页</option>"; } str+="</select></p></form>"; return str; } }