pager-taglib 体验
可能是自已习惯了用自已的分页组件。一直不知道有这样一个现成的分页标签。直到那天，白衣跟我提起了一下，我Search了一下，发现了Pager-taglib这个东东。支持多种风格的分页显示。先简单介绍一下Pager-taglib。实际上，她是一个Jsp标签库，为在JSP上显示分页信息而设计的一套标签，通过这些标签的不同的组合，会形成多种不一样的分页页面，风格各异，她自带的DEMO就有七种左右的分页风格，包括Google的分页风格。而需要订制自已的风格的分页页面也非常简单。
接触的当天、匆匆看了下Demo和文档，发现这个很早（2002年最新版一直到现在）就已经有的东西，似 乎比较擅长显示端分页。如，把所有的数据传到页面，通过参数设定页面大小等，可能得到很完美的分页效果。
第二天回家，做了些小动作，把一个页码参数塞进URL里面，让程序在页面之下分了页再把结果传出来，简单地实现了服务器的分页的功能。
Pager-taglib的文档很详尽，我如果有说也只有翻译的份，要是真的翻译也就免了，文档还是挺容易看懂的。于是我开始作了另外一个小Demo，用了原先Demo里面的一个分页风格（Simple），稍作修改。希望能帮助自已理清脉络和对朋友们有用：P
一、模拟业务类：
<div style="border-right: #cccccc 1px solid; padding-right: 5px; border-top: #cccccc 1px solid; padding-left: 4px; font-size: 13px; padding-bottom: 4px; border-left: #cccccc 1px solid; width: 98%; padding-top: 4px; border-bottom: #cccccc 1px solid; background-color: #eeeeee;">http://www.agoit.com/Images/OutliningIndicators/None.gifpackage net.jf.ajax.business;
http://www.agoit.com/Images/OutliningIndicators/None.gif
http://www.agoit.com/Images/OutliningIndicators/None.gifimport java.util.ArrayList;
http://www.agoit.com/Images/OutliningIndicators/None.gifimport java.util.List;
http://www.agoit.com/Images/OutliningIndicators/None.gif
http://www.agoit.com/Images/OutliningIndicators/ExpandedBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedBlock.gifpublic class PageManager http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif private static List names;
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names = new ArrayList();
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("black");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("black");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("black");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("black");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("blue");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("blue");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("blue");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("blue");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("blue");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("red");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("yellow");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("blue");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("green");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("blue");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("black");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("green");
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif names.add("black");
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif /** *//**
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif * 查询函数
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif * @param pageNum 页码
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif * @param pageSize 页大小
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif * @param condition 查询条件
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif * */
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif public List query(int pageNum,int pageSize,String condition)http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif List tmpNames = getNames(condition);
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif List ret = new ArrayList();
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif int start = (pageNum - 1) * pageSize;
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif int end = start + pageSize - 1;
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif if(start >= tmpNames.size())
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif return ret;
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif for(int i = 0; i < tmpNames.size(); i ++)http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif if(i >= start && i <= end)
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif ret.add(tmpNames.get(i));
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif return ret;
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif /** *//**
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif * 按条件查询所有名字
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif * */
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif private List getNames(String condition) http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif if(null == condition) return names;
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif List ret = new ArrayList();
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif for(int i = 0; i < names.size(); i ++)http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif if(condition.equals(names.get(i)))
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif ret.add(names.get(i));
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif return ret;
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif /** *//**
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif * 获得条件指定的名字的数量
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif * */
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockStart.gifhttp://www.agoit.com/Images/OutliningIndicators/ContractedSubBlock.gif public int getSize(String condition)http://www.agoit.com/Images/dot.gif{
http://www.agoit.com/Images/OutliningIndicators/InBlock.gif return getNames(condition).size();
http://www.agoit.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://www.agoit.com/Images/OutliningIndicators/ExpandedBlockEnd.gif}
http://www.agoit.com/Images/OutliningIndicators/None.gif
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