分页显示记录

分页显示记录

 

分页显示记录

<% @ page contentType = " text/html;charset=GB2312 "   %>
<% @ page import = " java.sql.* "   %>
<%
int  dipage = 1 ; // 当前页码数默认为1
String  pages = request.getParameter( " dipage " );
if (pages == null )
{
  pages = " 1 " ;
}
try
{
  dipage = Integer .parseInt(pages);
}
catch(Exception e)
{
  dipage = 1 ; 
}
%>
< HTML >
< title > 用户数据 </ title >
< BODY >
  <%  Connection con;
    Statement sql; 
    ResultSet rs;
    try
    {
      Class.forName( " com.microsoft.jdbc.sqlserver.SQLServerDriver " );
    }
    catch(ClassNotFoundException e)
    {
      out.print( " 类找不到！ " );
    }
    try 
    {  
         con = DriverManager.getConnection( " jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=testDatabse " , " sa " , "" );
         sql = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
         rs = sql.executeQuery( " SELECT * FROM userTable " );
          int  countRecord = 0 ; // 记录条数
          int  countPageRecord = 0 ; // 每页记录条数
          int  countPage = 0 ; // 总页数
         countPageRecord = 5 ; // 每页5条记录，要设置每页记录条数就更改这个变量的值
          // 得到记录的条数
         rs.last();
         countRecord = rs.getRow();
          // 得到总页数
          if (countRecord / countPageRecord == 0 )
            countPage = countRecord / countPageRecord;
          else
            countPage = countRecord / countPageRecord + 1 ;
          // 把记录指针移至当前页第一条记录之前
          if ((dipage - 1 ) * countPageRecord == 0 )
            rs.beforeFirst();
          else
            rs.absolute((dipage - 1 ) * countPageRecord);
         out.print( " <Table Border style='font-size: 10pt'> " );
         out.print( " <TR><td colspan=8 align=center>用户数据</td></tr> " );   
         out.print( " <TR> " );
            out.print( " <Td width=60 > " + " 用户ID号 " );
            out.print( " <Td width=50 > " + " 用户名 " );
            out.print( " <Td width=100> " + " 用户真实姓名 " );
            out.print( " <Td width=40> " + " 年龄 " );
            out.print( " <Td width=40> " + " 性别 " );
            out.print( " <Td width=100> " + " 联系地址 " );
            out.print( " <Td width=100> " + " 联系电话 " );
            out.print( " <Td width=100> " + " 添加时间 " );
         out.print( " </TR> " );
        int  i = 0 ;
        while (rs.next())
       { out.print( " <TR> " );
             out.print( " <TD > " + rs.getLong( 1 ) + " </TD> " );
             out.print( " <TD > " + rs.getString( 2 ) + " </TD> " ); 
             out.print( " <TD > " + rs.getString( 4 ) + " </TD> " );
             out.print( " <TD > " + rs.getInt( " user_age " ) + " </TD> " ); 
             out.print( " <TD > " + rs.getString( " user_sex " ) + " </TD> " );
             out.print( " <TD > " + rs.getString( " user_address " ) + " </TD> " );
             out.print( " <TD > " + rs.getString( " user_telephone " ) + " </TD> " );
             out.print( " <TD > " + rs.getString( " add_time " ) + " </TD> " );
        out.print( " </TR> " ) ;
        i ++ ;
         if (i >= countPageRecord) break;  // 当前页显示完，则退出循环
        }
        out.print( " <TR><td colspan=8 align=center> " );
           out.print( " 共 " + countRecord + " 条记录,共 " + countPage + " 页，当前第 " + dipage + " 页，每页 " + countPageRecord + " 条记录， " );
            if (dipage == 1 ) // 当前是首页
              ;
            else // 当前不是首页
           {
              out.print( " <a href=userPage1.jsp?dipage=1>首页</a>， " );
              out.print( " <a href=userPage1.jsp?dipage= " + (dipage - 1 ) + " >上一页</a>, " );
           }
            if (dipage == countPage) // 当前是末页
              ;
            else // 当前不是末页
           {
              out.print( " <a href=userPage1.jsp?dipage= " + (dipage + 1 ) + " >下一页</a>, " );
              out.print( " <a href=userPage1.jsp?dipage= " + countPage + " >末页</a> " );
           }          
           
           out.print( " </td></tr> " ); 
        out.print( " </Table> " );
        con.close();
     }
   catch(SQLException e1) 
   {
      out.print( " SQL异常！ " );
   }
  %>
</ BODY >
</ HTML >