JAVA分页总结

JAVA分页总结

环境：数据库用的是MYSQL

 

不走1：前端页面增长“上一页，下一页”……

 

<ahref="?startindex=&lt;%=preindex%>&amp;pagesize=10"&gt;上一页</a>

 

<ahref="?startindex=&lt;%=nextindex%>&amp;pagesize=10"&gt;下一页</a>

 

 

不走2：JSP页面增长代码

recordop c=   new recordop();

c.request=request;

ResultSet rs=c.list("uname");     //取得查询纪录

Stringpreindex=c.getpreindex();

String nextindex=c.getnextindex();

 

 

 

不走3：后端JAVA增长如下3个方法用来计算上一页及下一页索引

 

publicintpagesize=12;

    public String getpreindex()

    {

       int curindex=0;

       if(request.getParameter("startindex")==null)

           return"0";

       else

       {

           curindex=Integer.valueOf(request.getParameter("startindex"));

           int pre=curindex-pagesize;

           if(pre&lt;0)

              return"0";

           else

              return String.valueOf(pre);

          

       }

      

      

    }

    public String getCurIndex()

    {

       int curindex=0;

       if(request.getParameter("startindex")==null)

           return"0";

       else

       {

           return (request.getParameter("startindex"));

            

          

       }

      

      

    }

   

    public Stringgetnextindex()

    {

       int curindex=0;

       if(request.getParameter("startindex")==null)

       {

           int next=curindex&#43;pagesize;

           return String.valueOf(next);

       }

            

       else

       {

           curindex=Integer.valueOf(request.getParameter("startindex"));

           int next=curindex&#43;pagesize;        

           return String.valueOf(next);

          

       }

    }

 

 

不走4：增长LIST方法，查询纪录：主要语句为

 

 

    String sql = "select *from vinrecord order by id desc limit "&#43;getCurIndex()&#43;","&#43;String.valueOf(pagesize);