java中对list分页并显示数据到页面实例代码

有时候需要根据条件查询得出的数据较多，需要分页显示到页面上。这时点击下一页就不方便每次带查询条件在数据库中分页。可以在list中进行分页。

page的model类：

public class page { 
  private integer currentpage;//当前页 
  private int pagesize;//每页显示记录条数 
  private int totalpage;//总页数 
  private list<?> datalist;//每页显示的数据 
  private int star;//开始数据 
 
  public integer getcurrentpage() { 
    return currentpage; 
  } 
  public void setcurrentpage(integer currentpage) { 
    this.currentpage = currentpage; 
  } 
  public int getpagesize() { 
    return pagesize; 
  } 
  public void setpagesize(int pagesize) { 
    this.pagesize = pagesize; 
  } 
  public int gettotalpage() { 
    return totalpage; 
  } 
  public void settotalpage(int totalpage) { 
    this.totalpage = totalpage; 
  } 
  public list<?> getdatalist() { 
    return datalist; 
  } 
  public void setdatalist(list<?> datalist) { 
    this.datalist = datalist; 
  } 
  public int getstar() { 
    return star; 
  } 
  public void setstar(int star) { 
    this.star = star; 
  } 
} 

控制层：

@requestmapping("fenye.do") 
  public string fen(page page,httpservletrequest request){ 
 
    try { 
      //查询出的list数据 
      list<data> showdata=loginservice.selectyichall(); 
      //刚开始的页面为第一页 
      if (page.getcurrentpage() == null){ 
        page.setcurrentpage(1); 
      } else { 
        page.setcurrentpage(page.getcurrentpage()); 
      } 
      //设置每页数据为十条 
      page.setpagesize(10); 
      //每页的开始数 
      page.setstar((page.getcurrentpage() - 1) * page.getpagesize()); 
      //list的大小 
      int count = showdata.size(); 
      //设置总页数 
      page.settotalpage(count % 10 == 0 ? count / 10 : count / 10 + 1); 
      //对list进行截取 
      page.setdatalist(showdata.sublist(page.getstar(),count-page.getstar()>page.getpagesize()?page.getstar()+page.getpagesize():count)); 
      //设置作用域 
      request.setattribute("paging", page);         
      return "add/show.jsp"; 
 
    } catch (exception e) { 
      // todo auto-generated catch block    
      e.printstacktrace(); 
      return "mistake.jsp"; 
    } 
  } 

jsp页面：

<script type="text/javascript" language="javascript"> 
 function gopage(page){ 
 location.href="fenye.do?currentpage=" rel="external nofollow" +page; 
 } 
</script> 
 
 
<div> 
 <table width="100%" border="0" align="center" cellspacing="1" > 
 <c:foreach items="${paging.datalist }" var="upl">    
   <tr> 
    <td align="center">${upl.name1 }</td> 
    <td align="center">${upl.name2 }</td> 
    <td align="center">${upl.name3 }</td>    
   </tr> 
   </c:foreach>   
 </table> 
</div> 
<div style="text-align:center; margin-top:10px;color: white;" id="venderfen"> 
 <c:if test="${paging.totalpage > 0}"> 
  当前第 ${paging.currentpage } 页/共  ${paging.totalpage} 页 
 </c:if> 
 <c:if test="${paging.totalpage > 1}"> 
   <c:choose> 
     <c:when test="${paging.currentpage==2 && paging.totalpage==2}"> 
      <a onclick="gopage(1)">首页</a> 
      <a onclick="gopage(${paging.currentpage-1})">上一页</a> 
     </c:when> 
     <c:when test="${paging.currentpage==1}"> 
      <a onclick="gopage(${paging.currentpage+1})">下一页</a> 
      <a onclick="gopage(${paging.totalpage})">末页</a> 
     </c:when> 
     <c:when test="${paging.currentpage==paging.totalpage}"> 
      <a onclick="gopage(1)">首页</a> 
      <a onclick="gopage(${paging.currentpage-1})">上一页</a> 
     </c:when> 
     <c:otherwise> 
      <a onclick="gopage(1)">首页</a> 
      <a onclick="gopage(${paging.currentpage-1})">上一页</a> 
      <a onclick="gopage(${paging.currentpage+1})">下一页</a> 
      <a onclick="gopage(${paging.totalpage})">末页</a> 
     </c:otherwise> 
  </c:choose> 
  </c:if> 
 共 ${paging.total} 条 
</div>  

stringbuilder sb = new stringbuilder(); 
sb.append("select distinct(m.time) "); 
sb.append(" from tbl_monitor m left join tbl_variable v on m.variable = v.id "); 
sb.append(" left join tbl_variable_group g on v.variable_group = g.id "); 
       
sb.append(" where v.active = true and g.active=true "); 
//sb.append(" and m.variable in " + variableids); 
sb.append(" and exists ( select vtemp.id from tbl_variable vtemp where vtemp.selected=true and vtemp.id=m.variable)"); 
sb.append(" and m.time between " + begintime + " and " + endtime ); 
sb.append(" order by m.time asc"); 
query query = em.createnativequery(sb.tostring()); 
//满足搜索条件的所有的时间的条数 
int total = query.getresultlist().size(); 
tableview.settotal(total); 
tableview.settotalpage(total % page.getpagesize() == 0 ? total / page.getpagesize() : (total / page.getpagesize()) + 1); 
query.setfirstresult(from); 
query.setmaxresults(offset); 
timelist = query.getresultlist(); 

总结

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