display 分页

-> http://displaytag.sourceforge.net
分页流程描述：
  1.组合查询参数得取。
    比如时间范围，用户名模糊查询。。这些存入 session->data;name
  2.通过持久层得到 ‘数据总条数’‘当前展现页数据’；
  3.分页点击；根据session 组合参数，再次向数据库申请书及。

代码：

< jsp:root  version ="1.2"  xmlns:jsp ="http://java.sun.com/JSP/Page"
    xmlns:display ="urn:jsptld:http://displaytag.sf.net" >
     < jsp:directive .page import ="java.util.regex.Pattern"   />
     < jsp:directive .page import ="test.Bean"   />
     < jsp:directive .page import ="java.util.ArrayList"   />
     < jsp:directive .page import ="java.util.List"   />
     < jsp:directive .page contentType ="text/html; charset=UTF-8"   />
     < jsp:include  page ="inc/header.jsp"  flush ="true"   />

< jsp:scriptlet >   <! [CDATA[

    Pattern pattern  =  Pattern.compile( " d-[0-9]+-p " );
    String pageIndexName  =   null  ;
     for (Object otmp : request.getParameterMap().keySet() ){
         if ( pattern.matcher(otmp.toString()).find() ){
            pageIndexName  =  otmp.toString();
             break ;
        } 
    }
    
    
     int  pageSize  =   10 ;    // 每页显示的条数
     int  pageIndex  =   0  ;
     if (pageIndexName != null ){
        pageIndex  =  (request.getParameter(pageIndexName) == null ) ?
                 0 :(Integer.parseInt(request.getParameter(pageIndexName))  -   1 );   // 当前页数
    }
    
            
     List list  =   new  ArrayList();   
      for ( int  i = 0 ;i < pageSize;i ++ ){
         list.add(  new  Bean(pageIndex * 10 + i, " liu- " + pageIndex * 10 + i)  );
     }
    request.setAttribute( " data " ,list);
    session.setAttribute(  " resultSize " ,  100  );
    out.print( " ! " + pageIndexName);


    ]] ></ jsp:scriptlet >

     < h2 > 数据分页展现开始 </ h2 >
     < display:table  name ="data"  pagesize ="10"  partialList ="true"
        size ="sessionScope.resultSize" >
         < display:column  property ="id"  title ="ID" ></ display:column >
         < display:column  property ="name"  title ="名字" ></ display:column >
     </ display:table >
    
    
     < jsp:include  page ="inc/footer.jsp"  flush ="true"   />

</ jsp:root >