日期:2014-05-16  浏览次数:20375 次

看看JSP中怎样实现分页(按关键字查询)显示(雇员管理)

前面的文章实现了分页显示,现在把分页显示的进行了整合,整合到了一个单独的页面中,加入了按关键字查询,具体实现如下:

用于实现分页和查询的页面文件:

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 = "" ;	// 如果模糊查询没有关键字,则表示查询全部
	}
%>
<%
	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>


emp_list_true.jsp进行数据库操作和显示的页面文件:

emp_list_true.jsp

<%@ page contentType="text/html" pageEncoding="GBK"%>
<%@ page import="java.sql.*" %>
<html>
<head><title>雇员列表显示</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_true.jsp" ;
%>
<%!
	public static final String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
	public static final String DBURL = "jdbc:oracle:thin:@localhost:1521:ORACLE" ;
	public static final String DBUSER = "scott" ;
	public static final String DBPASSWORD = "tiger" ;