emp_list.jsp调用split_page_plugin.jsp实现对数据库表的分页查询和模糊查询操作，但是最后出来的效果无法实现分页查询中的首页、上一页、下一页操作操作，相应按钮也不亮，如图，我用的是mysql数据库，请高手帮我调试一下，非常感谢，相应代码如下：
emp_list.jsp
<%@ page contentType="text/html" pageEncoding="GBK"%>
<%@ page import="java.sql.*" %>
<html>
<head><title>www.mldnjava.cn，MLDN高端Java培训</title>
<style type="text/css">
<!--
.STYLE6 {font-size: 12px}
.STYLE10 {font-size: 14px; font-weight: bold; }
-->
</style>
</head>
<script language="javascript">
function changeColor(obj,color){
obj.bgColor = color ;
}
</script>
<body>
<%!
public static final String URL = "emp_list.jsp" ;
%>
<%!
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
public static final String DBURL = "jdbc:mysql://localhost:3306/mldn";
public static final String DBUSER = "root";
public static final String DBPASSWORD = "toor";
%>
<%
Connection conn = null ;
PreparedStatement pstmt = null ;
ResultSet rs = null ;
%>
<%
int currentPage = 1 ; // 为当前所在的页，默认在第1页
int lineSize = 3 ; // 每次显示的记录数
int allRecorders = 0 ; // 表示全部的记录数
String keyWord = request.getParameter("kw"); //接收查询关键字
%>
<%
try{
currentPage = Integer.parseInt(request.getParameter("cp")) ;
} catch(Exception e) {}
try{
lineSize = Integer.parseInt(request.getParameter("ls")) ;
} catch(Exception e) {}
if(keyWord == null){
keyWord = "";
}
%>
<%
Class.forName(DBDRIVER) ;
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD) ;
String sql = "SELECT COUNT(empno) FROM emp " +
" WHERE empno LIKE ? OR ename LIKE ? OR job LIKE ? OR DATE_FORMAT(hiredate,'yyyy-mm-dd') LIKE ? " +
" OR sal LIKE ? OR comm LIKE ? " ;
pstmt = conn.prepareStatement(sql) ;
pstmt.setString(1,"%"+keyWord+"%") ;
pstmt.setString(2,"%"+keyWord+"%") ;
pstmt.setString(3,"%"+keyWord+"%") ;
pstmt.setString(4,"%"+keyWord+"%") ;
pstmt.setString(5,"%"+keyWord+"%") ;
pstmt.setString(6,"%"+keyWord+"%") ;
rs = pstmt.executeQuery() ;
if(rs.next()){ // 取得全部的记录数
allRecorders = rs.getInt(1) ;
}
%>
<center>
<h1>雇员列表</h1>
<jsp:include page="split_page_plugin.jsp">
<jsp:param name="allRecorders" value="<%=allRecorders%>"/>
<jsp:param name="url" value="<%=URL%>"/>
</jsp:include>
<TABLE BORDER="1" cellpadding="5" cellspacing="0" bgcolor="F2F2F2" width="100%">
<TR onMouseOver="changeColor(this,'white')" onMouseOut="changeColor(this,'F2F2F2')">
<td align="center" valign="middle"><span class="STYLE10">编号</span></td>
<td align="center" valign="middle"><span class="STYLE10">姓名</span></td>
<td align="center" valign="middle"><span class="STYLE10">职位</span></td>
<td align="center" valign="middle"><span class="STYLE10">雇佣日期</span></td>
<td align="center" valign="middle"><span class="STYLE10">工资</span></td>
<td align="center" valign="middle"><span class="STYLE10">奖金</span></td>
</TR>
<%
sql = " SELECT * FROM emp WHERE empno LIKE ? OR ename LIKE ? OR job LIKE ? OR DATE_FORMAT(hiredate,'yyyy-mm-dd') LIKE ? "+
"OR sal LIKE ? OR comm LIKE ? ORDER BY empno LIMIT ? , ? ";
pstmt = conn.prepareStatement(sql) ;
pstmt.setString(1,"%"+keyWord+"%");
pstmt.setString(2,"%"+keyWord+"%");
pstmt.setString(3,"%"+keyWord+"%");
pstmt.setString(4,"%"+keyWord+"%");
pstmt.setString(5,"%"+keyWord+"%");
pstmt.setString(6,"%"+keyWord+"%");
pstmt.setInt(7,(currentPage -1)* lineSize) ;
pstmt.setInt(8,lineSize) ;
rs = pstmt.executeQuery() ;
%>
<%
while(rs.next()){
int empno = rs.getInt(1) ;
String ename = rs.getString(2) ;
String job = rs.getString(3) ;
Date hiredate = rs.getDate(4) ;
double sal = rs.getDouble(5) ;
double comm = rs.getDouble(6) ;
%>
<TR onMouseOver="changeColor(this,'white')" onMouseOut="changeColor(this,'F2F2F2')">
<td align="center" valign="middle"><span class="STYLE6"><%=empno%></span></td>
<td align="center" valign="middle"><span class="STYLE6"><%=ename%></span></td>
<td align="center" valign="middle"><span class="STYLE6"><%=job%></span></td>
<td align="center" valign="middle"><span class="STYLE6"><%=hiredate%></span></td>
<td align="center" valign="middle"><span class="STYLE6"><%=sal%></span></td>
<td align="center" valign="middle"><span class="STYLE6"><%=comm%></span></td>
</TR>
<%
}
%>
</table>
<%
conn.close() ;
%>
</center>
</body>
</html>
split_page_plugin.jsp
<%@ page contentType="text/html" pageEncoding="GBK"%>
<%
int currentPage = 1 ; // 为当前所在的页，默认在第1页
int lineSize = 3 ; // 每次显示的记录数
long allRecorders = 0 ; // 表示全部的记录数
long pageSize = 1 ; // 表示全部的页数（尾页）
int lsData[] = {1,3,5,7,9,10,15,20,25,30,50,100} ;
String keyWord = request.getParameter("kw"); //接收查询关键字
String url = request.getParameter("url");
%>
<%
try{
currentPage = Integer.parseInt(request.getParameter("cp")) ;
} catch(Exception e) {}
try{
lineSize = Integer.parseInt(request.getParameter("ls")) ;
} catch(Exception e) {}
try{
allRecorders = Long.parseLong(request.getParameter("allRecorders")) ;
} catch(Exception e) {}
if(keyWord == null){
keyWord = "";
}
%>
<%
pageSize = (allRecorders + lineSize -1) / lineSize ;
if(pageSize == 0){
pageSize = 1;
}
%>
<script language="javascript">
function go(num){
document.getElementById("cp").value = num ;
document.spform.submit() ; // 表单提交
}
</script>
<form name="spform" action="<%=url%>" method="post">
输入查询关键字：<input type="text" name="kw" value="<%=keyWord%>"><input type="submit" value="查询"><br>
<input type="button" value="首页" onclick="go(1)" <%=currentPage==1?"DISABLED":""%>>
<input type="button" value="上一页" onclick="go(<%=currentPage-1%>)" <%=currentPage==1?"DISABLED":""%>>
<input type="button" value="下一页" onclick="go(<%=currentPage+1%>)" <%=currentPage==pageSize?"DISABLED":""%>>
<input type="button" value="尾页" onclick="go(<%=pageSize%>)" <%=currentPage==pageSize?"DISABLED":""%>>
跳转到第<select name="selcp" onchange="go(this.value)">
<%
for(int x=1;x<=pageSize;x++){
%>
<option value="<%=x%>" <%=x==currentPage?"SELECTED":""%>><%=x%></option>
<%
}
%>
</select>页
每页显示
<select name="ls" onchange="go(1)">
<%
for(int x=0;x<lsData.length;x++){
%>
<option value="<%=lsData[x]%>" <%=lsData[x]==lineSize?"SELECTED":""%>><%=lsData[x]%></option>
<%
}
%>
</select>
条
<input type="hidden" name="cp" value="1">
</form>
