velocity中简单的分页显示

后台返回的参数是当前页，总数量，list数据，搜索的字符串。

#set($page_size = 10)//一页大小
#set($page2 = $total/10)
#set($page1 = $total/10+1)
#if($total/10 ==0)//设置总页数
#if($total<10)
#set($page_count = $page2+1)
#else
#set($page_count = $page2)
#end
#else
#set($page_count = $page1)  
#end
#set($p_page = $index)//当前页
#set($pre1_page = $p_page - 1)
#set($pre2_page = $p_page - 2)
#set($next1_page = $p_page + 1)
#set($next2_page = $p_page + 2)

    <form action="/index/searchGift.htm" method="post">    
             搜索条件:<input type="text" name="str" value="$str" >  
             <input type="submit" value="搜索">
    </form>  
    
    #foreach($info in $list)
       giftName:[$info.giftName]   giftPrice:[$info.giftPrice]   oneType:[$info.oneType]  twoType:[$info.twoType] <br>
    #end
    <h2>#if($page_count > 1)
             #if($p_page>1)
              <a href="/index/searchGift.htm?pageindex=1&str=$str" >首页</a>
                 <a href="/index/searchGift.htm?pageindex=$pre1_page&str=$str">上页</a>
             #end
             #if($pre2_page >=1)
             <a href="/index/searchGift.htm?pageindex=$pre2_page&str=$str">$pre2_page</a>
             #end
             #if($pre1_page >=1)
             <a href="/index/searchGift.htm?pageindex=$pre1_page&str=$str">$pre1_page</a>
             #end
             <a href="/index/searchGift.htm?pageindex=$p_page&str=$str">$p_page</a>
             #if($next1_page <=$page_count)
             <a href="/index/searchGift.htm?pageindex=$next1_page&str=$str">$next1_page</a>
             #end
             #if($next2_page <=$page_count)
             <a href="/index/searchGift.htm?pageindex=$next2_page&str=$str">$next2_page</a>
             #end
             #if($p_page < $page_count)
              <a href="/index/searchGift.htm?pageindex=$next1_page&str=$str">下页</a>
              <a href="/index/searchGift.htm?pageindex=$page_count&str=$str">尾页</a>
             #end
        #end
             #if($page_count>0)
                 当前第$p_page页,共$page_count页 <input type="text" id= "index" style="width:30px"><a href="#" onClick="jump()">跳转</a>
             #else
                 没有找到东西
             #end
        </h2>
        
<script>
    function jump(){
      var page = document.getElementById("index").value;
      if(page&&page>0&&page<=$page_count){//有输入值，并且输入值在1到总页数之间才跳转。
          window.location.href="/index/searchGift.htm?pageindex="+page+"&str=$str";
      }
   }
</script>

效果为：

首页  上页 1 2 3 4 5 下页 尾页 当前第3页，共42页      跳转