PageBean分页组件

Page.java

  1 package org.guangsoft.bean;
  2 
  3 import java.util.List;
  4 
  5 public class Page
  6 {
  7     private int currentPageNum;
  8     private int pageItemsCount;
  9     private int totalItemsCount;
 10     
 11     private int pageItemsStart;
 12     private int pageItemsEnd;
 13     private int pageCount;
 14     private boolean hasPrePage;
 15     private boolean hasNextPage;
 16     private int prePageNum;
 17     private int nextPageNum;
 18     private int firstPageNum;
 19     private int lastPageNum;
 20     private List dataList;
 21     
 22     public Page()
 23     {
 24         super();
 25     }
 26     public Page(int currentPageNum, int pageItemsCount, int totalItemsCount)
 27     {
 28         super();
 29         this.currentPageNum = currentPageNum;
 30         this.pageItemsCount = pageItemsCount;
 31         this.totalItemsCount = totalItemsCount;
 32         
 33         pageItemsStart = (currentPageNum - 1) * pageItemsCount;
 34         pageItemsEnd = pageItemsStart + pageItemsCount - 1;
 35         pageCount = (int) Math.ceil(totalItemsCount * 1.0 / pageItemsCount);
 36         firstPageNum = totalItemsCount > 0 ? 1 : 0;
 37         lastPageNum = totalItemsCount > 0 ? pageCount : 0;
 38         hasPrePage = currentPageNum > 1 ? true : false;
 39         hasNextPage = currentPageNum < lastPageNum ? true : false;
 40         prePageNum = hasPrePage ? currentPageNum - 1 : 0;
 41         nextPageNum = hasNextPage ? currentPageNum + 1 : 0;
 42     }
 43     public int getCurrentPageNum()
 44     {
 45         return currentPageNum;
 46     }
 47     public void setCurrentPageNum(int currentPageNum)
 48     {
 49         this.currentPageNum = currentPageNum;
 50     }
 51     public int getPageItemsCount()
 52     {
 53         return pageItemsCount;
 54     }
 55     public void setPageItemsCount(int pageItemsCount)
 56     {
 57         this.pageItemsCount = pageItemsCount;
 58     }
 59     public int getTotalItemsCount()
 60     {
 61         return totalItemsCount;
 62     }
 63     public void setTotalItemsCount(int totalItemsCount)
 64     {
 65         this.totalItemsCount = totalItemsCount;
 66     }
 67     public int getPageItemsStart()
 68     {
 69         return pageItemsStart;
 70     }
 71     public void setPageItemsStart(int pageItemsStart)
 72     {
 73         this.pageItemsStart = pageItemsStart;
 74     }
 75     public int getPageItemsEnd()
 76     {
 77         return pageItemsEnd;
 78     }
 79     public void setPageItemsEnd(int pageItemsEnd)
 80     {
 81         this.pageItemsEnd = pageItemsEnd;
 82     }
 83     public int getpageCount()
 84     {
 85         return pageCount;
 86     }
 87     public void setpageCount(int pageCount)
 88     {
 89         this.pageCount = pageCount;
 90     }
 91     public boolean isHasPrePage()
 92     {
 93         return hasPrePage;
 94     }
 95     public void setHasPrePage(boolean hasPrePage)
 96     {
 97         this.hasPrePage = hasPrePage;
 98     }
 99     public boolean isHasNextPage()
100     {
101         return hasNextPage;
102     }
103     public void setHasNextPage(boolean hasNextPage)
104     {
105         this.hasNextPage = hasNextPage;
106     }
107     public int getPrePageNum()
108     {
109         return prePageNum;
110     }
111     public void setPrePageNum(int prePageNum)
112     {
113         this.prePageNum = prePageNum;
114     }
115     public int getNextPageNum()
116     {
117         return nextPageNum;
118     }
119     public void setNextPageNum(int nextPageNum)
120     {
121         this.nextPageNum = nextPageNum;
122     }
123     public int getFirstPageNum()
124     {
125         return firstPageNum;
126     }
127     public void setFirstPageNum(int firstPageNum)
128     {
129         this.firstPageNum = firstPageNum;
130     }
131     public int getLastPageNum()
132     {
133         return lastPageNum;
134     }
135     public void setLastPageNum(int lastPageNum)
136     {
137         this.lastPageNum = lastPageNum;
138     }
139     public List getDataList()
140     {
141         return dataList;
142     }
143     public void setDataList(List dataList)
144     {
145         this.dataList = dataList;
146     }
147 }

 

/* * @(#)PageControl.java 1.00 2004-9-22 * * Copyright 2004 2004 . All rights reserved. * PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */ package com.hexiang.utils; /** * PageControl, 分页控制, 可以判断总页数是否有上下页. * * 2008-07-22 加入输出上下分页HTML代码功能 * * @author HX * @version 1.1 2008-9-22 */ public class PageBean { /** 每页显示记录数 */ private int pageCount; /** 是否有上一页 */ private boolean hasPrevPage; /** 记录总数 */ private int recordCount; /** 是否有下一页 */ private boolean hasNextPage; /**总页面数 */ private int totalPage; /** 当前页码数 */ private int currentPage; /** * 分页前的页面地址 */ private String pageUrl; /** * 输出分页 HTML 页面跳转代码, 分链接静态文字两种. * 2008-07-22 * @return HTML 代码 */ public String getPageJumpLinkHtml() { if(StringUtil.isEmpty(pageUrl)) { return ""; } // 检查是否有参数符号, 没有就加上一个? if(pageUrl.indexOf('?') == -1) { pageUrl = pageUrl + '?'; } StringBuffer buff = new StringBuffer("<span id='pageText'>"); // 上一页翻页标记 if(currentPage > 1) { buff.append("[ <a href='" + pageUrl + "&page=" + (currentPage - 1) + "' title='转到第 " + (currentPage - 1) + " 页'>上一页</a> ] "); } else { buff.append("[ 上一页 ] "); } // 下一页翻页标记 if(currentPage < getTotalPage()) { buff.append("[ <a href='" + pageUrl + "&page=" + (currentPage + 1)+ "' title='转到第 " + (currentPage + 1) + " 页'>下一页</a> ] "); } else { buff.append("[ 下一页 ] "); } buff.append("</span>"); return buff.toString(); } /** * 输出页码信息: 第${currentPage}页/共${totalPage}页 * @return */ public String getPageCountHtml() { return "第" + currentPage + "页/共" + getTotalPage() + "页"; } /** * 输出 JavaScript 跳转函数代码 * @return */ public String getJavaScriptJumpCode() { if(StringUtil.isEmpty(pageUrl)) { return ""; } // 检查是否有参数符号, 没有就加上一个? if(pageUrl.indexOf("?") == -1) { pageUrl = pageUrl + '?'; } return "<script>" + "// 页面跳转函数\n" + "// 参数: 包含页码的表单元素,例如输入框,下拉框等\n" + "function jumpPage(input) {\n" + " // 页码相同就不做跳转\n" + " if(input.value == " + currentPage + ") {" + " return;\n" + " }" + " var newUrl = '" + pageUrl + "&page=' + input.value;\n" + " document.location = newUrl;\n" + " }\n" + " </script>"; } /** * 输出页面跳转的选择框输入框. 示例输出: * <pre> 转到 <!-- 输出 HTML SELECT 元素, 并选中当前页面编码 --> <select onchange='jumpPage(this);'> <c:forEach var="i" begin="1" end="${totalPage}"> <option value="${i}" <c:if test="${currentPage == i}"> selected </c:if> >第${i}页</option> </c:forEach> </select> 输入页码:<input type="text" value="${currentPage}" id="jumpPageBox" size="3"> <input type="button" value="跳转" onclick="jumpPage(document.getElementById('jumpPageBox'))"> </pre> * @return */ public String getPageFormJumpHtml() { String s = "转到\n" + "\t <!-- 输出 HTML SELECT 元素, 并选中当前页面编码 -->\n" + " <select onchange='jumpPage(this);'>\n" + " \n"; for(int i = 1; i <= getTotalPage(); i++ ) { s += "<option value=" + i + "\n"; if(currentPage == i) { s+= " selected "; } s += "\t>第" + i + "页</option>\n"; } s+= " </select>\n" + " 输入页码:<input type=\"text\" value=\"" + currentPage + "\" id=\"jumpPageBox\" size=\"3\"> \n" + " <input type=\"button\" value=\"跳转\" onclick=\"jumpPage(document.getElementById('jumpPageBox'))\"> "; return s; } /** * 进行分页计算. */ private void calculate() { if (getPageCount() == 0) { setPageCount(1); } totalPage = (int) Math.ceil(1.0 * getRecordCount() / getPageCount()); // 总页面数 if (totalPage == 0) totalPage = 1; // Check current page range, 2006-08-03 if(currentPage > totalPage) { currentPage = totalPage; } // System.out.println("currentPage=" + currentPage); // System.out.println("maxPage=" + maxPage); // // Fixed logic error at 2004-09-25 hasNextPage = currentPage < totalPage; hasPrevPage = currentPage > 1; return; } /** * @return Returns the 最大页面数. */ public int getTotalPage() { calculate(); return totalPage; } /** * @param currentPage * The 最大页面数 to set. */ @SuppressWarnings("unused") private void setTotalPage(int maxPage) { this.totalPage = maxPage; } /** * 是否有上一页数据 */ public boolean hasPrevPage() { calculate(); return hasPrevPage; } /** * 是否有下一页数据 */ public boolean hasNextPage() { calculate(); return hasNextPage; } // Test public static void main(String[] args) { PageBean pc = new PageBean(); pc.setCurrentPage(2); pc.setPageCount(4); pc.setRecordCount(5); pc.setPageUrl("product/list.do"); System.out.println("当前页 " + pc.getCurrentPage()); System.out.println("有上一页 " + pc.hasPrevPage()); System.out.println("有下一页 " + pc.hasNextPage()); System.out.println("总页面数 " + pc.getTotalPage()); System.out.println("分页 HTML 代码 " + pc.getPageJumpLinkHtml()); } /** * @return Returns the 当前页码数. */ public int getCurrentPage() { return currentPage; } /** * 设置当前页码, 从 1 开始. * @param currentPage * The 当前页码数 to set. */ public void setCurrentPage(int currentPage) { if (currentPage <= 0) { currentPage = 1; } this.currentPage = currentPage; } /** * @return Returns the recordCount. */ public int getRecordCount() { return recordCount; } /** * @param recordCount * The recordCount to set. */ public void setRecordCount(int property1) { this.recordCount = property1; } /** * @return Returns the 每页显示记录数. */ public int getPageCount() { return pageCount; } /** * @param pageCount * The 每页显示记录数 to set. */ public void setPageCount(int pageCount) { this.pageCount = pageCount; } public String getPageUrl() { return pageUrl; } public void setPageUrl(String value) { pageUrl = value; } }
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