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JSTL实现分页
添加时间:2013-7-7 点击量:JSTL(JSP Standard Tag Library ,JSP标准标签库)是一个络续完美的开放源代码的JSP标签库,是由apache的jakarta小组来保护的。JSTL只能运行在支撑JSP1.2和Servlet2.3规范的容器上,如tomcat 4.x。在JSP 2.0中也是作为标准支撑的。
下面介绍应用jstl实现的简单分页。引入的conn.jsp文件是应用jstl连接数据库文件,按照MVC的思惟,JSP作为View层,只是用来负责显示操纵,所以在大型项目开辟中一般不推荐应用JSTL的数据库标签。开辟景象:Myeclipse10、sqlservler2005、tomcat7.0.40
<%@ page language=java import=java.util. pageEncoding=UTF-8%>
<%@ taglib prefix=c uri=http://java.sun.com/jsp/jstl/core %>
<%@ taglib prefix=sql uri=http://java.sun.com/jsp/jstl/sql %>
<%@ taglib prefix=fmt uri=http://java.sun.com/jsp/jstl/fmt %>
<%@ taglib prefix=fn uri=http://java.sun.com/jsp/jstl/functions %>
<%@include file=conn.jsp %>
<!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN>
<html>
<head>
<base href=<%=basePath%>>
<title>My JSP fenye.jsp starting page</title>
<meta http-equiv=pragma content=no-cache>
<meta http-equiv=cache-control content=no-cache>
<meta http-equiv=expires content=0>
<meta http-equiv=keywords content=keyword1,keyword2,keyword3>
<meta http-equiv=description content=This is my page>
<!--
<link rel=stylesheet type=text/css href=styles.css>
-->
</head>
<body>
<div align=center>
<c:set var=pagesize value=4 scope=page />
<sql:query var=result1 maxRows=6 startRow=0> Table_1</sql:query>
<!--记录数 --> <c:set var=number value=¥{result1.rowCount} scope=page />
<!-- 策画分页数 --> <c:set var=pagenumber value=¥{(number+pagesize-1)/pagesize} />
<font color=blue><c:out value=¥{number} /></font>
<table border=1 align=center>
<tr>
<td>书名</td>
<td>作者</td>
<td>价格</td>
<th>操纵</th>
</tr>
<!--断定是否有信息 -->
<!-- 若是类别为空 otherwise -->
<c:choose>
<c:when test=¥{empty result1.rows}>
<tr>
<td colspan=4 align=center>临时没有图书!</td>
</tr>
</c:when>
<c:otherwise>
<c:forEach items=¥{result1.rowsByIndex} var=row1 begin=¥{param.start} end=¥{param.start+pagesize-1} >
<tr>
<td>¥{row1[0]}</td>
<td>¥{row1[1]}</td>
<td>¥{row1[2]}</td>
<td><a href=.jsp?name=¥{row1[0]}>删除</a></td>
</tr>
</c:forEach>
</c:otherwise>
</c:choose>
</table>
<!--分页 -->
<c:choose>
<c:when test=¥{param.start>0} >
<a href=fenye.jsp?start=¥{param.start-pagesize}>上一页</a>
</c:when>
<c:otherwise>
上一页
</c:otherwise>
</c:choose>
<c:choose>
<c:when test=¥{param.start+pagesize<number} >
<a href=fenye.jsp?start=¥{param.start+pagesize}>下一页</a>
</c:when>
<c:otherwise>
下一页
</c:otherwise>
</c:choose>
<!-- 显示记录数 -->
共<font color=red>¥{number}</font>笔记录
<!-- 显示分页数 -->
共<fmt:parseNumber type=number value=¥{pagenumber} integerOnly=true />页
</div>
</body>
</html>JSTL标签连接数据库conn.jsp文件:
<%@ page language=java import=java.util. pageEncoding=UTF-8%>
<%@ taglib prefix=sql uri=http://java.sun.com/jsp/jstl/sql %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+://+request.getServerName()+:+request.getServerPort()+path+/;
%>
<!DOCTYPE HTML PUBLIC -//W3C//DTD HTML 4.01 Transitional//EN>
<html>
<head>
<base href=<%=basePath%>>
<title>My JSP conn.jsp starting page</title>
<meta http-equiv=pragma content=no-cache>
<meta http-equiv=cache-control content=no-cache>
<meta http-equiv=expires content=0>
<meta http-equiv=keywords content=keyword1,keyword2,keyword3>
<meta http-equiv=description content=This is my page>
<!--
<link rel=stylesheet type=text/css href=styles.css>
-->
</head>
<body>
<sql:setDataSource
url=jdbc:sqlserver://localhost:1433;databaseName=library
driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
user=sa
password=123
/>
</body>
</html>导出的数据库脚本:
USE [library]
GO
/ 对象: Table [dbo].[Table_1] 脚本日期: 07/04/2013 14:32:03 /
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Table_1](
[name] [nchar](10) NOT NULL,
[author] [char](10) NULL,
[price] [int] NOT NULL,
CTRAINT [PK_Table_1] PRIMARY KEY CLUSTERED
(
[name] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
SET ANSI_PADDING OFF分页实现成果如下:
原来,再大的房子,再大的床,没有相爱的人陪伴,都只是冰冷的物质。而如果身边有爱人陪伴,即使房子小,床小,也觉得无关紧要,因为这些物质上面有了爱的温度,成了家的元素。—— 何珞《婚房》#书摘#