日期:2014-05-16 浏览次数:20402 次
功能:把数据库中的某张表在jsp页面中进行分页显示。
代码:?????
<%@ page language="java" contentType="text/html; charset=gbk" pageEncoding="gbk"%> <%@ page import="java.sql.*" %> <% request.setCharacterEncoding("gbk"); String strPageNo=request.getParameter("pageNo"); int pageNo; if(strPageNo==null||strPageNo.equals("")) { pageNo=1; }else{ try{ pageNo=Integer.parseInt(strPageNo.trim()); } catch(NumberFormatException e) { pageNo=1; } if(pageNo<=0) { pageNo=1; } } int pageSize=3; Class.forName("com.mysql.jdbc.Driver"); String url="jdbc:mysql://localhost:3306/bbs?user=root&password=12345678"; Connection conn=DriverManager.getConnection(url); Statement stmt=conn.createStatement(); String sql="select count(*) from article where pid=0"; ResultSet rs=stmt.executeQuery(sql); rs.next(); int totalnumber=rs.getInt(1);//总页数 stmt.close(); rs.close(); int totalpages=totalnumber%pageSize==0?totalnumber/pageSize:totalnumber/pageSize+1;//需要多少页进行显示 if(pageNo>totalpages)pageNo=totalpages;//如果当前页码大于总页数,那么将页码置为最大页数 int startpos=(pageNo-1)*pageSize;//当前页的第一条记录在数据库中的位置 Statement stmtsearch=conn.createStatement(); String sqlsearch="select * from article where pid=0 limit "+startpos+","+totalpages; ResultSet rssearch=stmtsearch.executeQuery(sqlsearch); %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gbk"> <title>Insert title here</title> </head> <body> <center> <a href="post.jsp">发表帖子</a> <table border="1" width="80%"> <% while(rssearch.next()){ %> <tr> <td> <a href="showfurther.jsp?id=<%=rssearch.getInt("id")%>"><%=rssearch.getString("title")%></a> </td> </tr> <% } %> </table> <a href="showflat.jsp?pageNo=1">首页</a> <a href="showflat.jsp?pageNo=<%=pageNo-1%>">上一页</a> <a href="showflat.jsp?pageNo=<%=pageNo+1%>">下一页</a> <a href="showflat.jsp?pageNo=<%=totalpages%>">最后一页</a> <form action="showflat.jsp" name="form1"> <select name="pageNo" onchange="document.form1.submit()"> <% for(int i=1;i<=totalpages;i++){ %> <option value=<%=i%> <%=(pageNo==i)?"selected":""%>>第<%=i %>页 </option> <% } %> </select> </form> <form action="showflat.jsp" name=form2> <input type="text" name="pageNo" value=<%=pageNo%>> <input type="submit" value="go"> </form> </center> <% rssearch.close(); stmtsearch.close(); conn.close(); %> </body> </html>
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