jsp+mysql文章内容分页展示
日期：2014-05-16 浏览次数：20373 次
jsp+mysql文章内容分页显示
表结构：
CREATE TABLE `article` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`content` text,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8
JSP页面：
<%@ page language="java" import="java.sql.*,java.io.*" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%
int size = 4096; //每一页显示的字符数
int currentPage = 0; //当前页，初始化为0
boolean hasNext = false; //是否有下一页
String p = request.getParameter("p");
if(p != null && !"".equals(p))
currentPage = Integer.parseInt(p);
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>Article Paging Demo</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">
</head>
<body>
<%
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/test","root","123456");
ps = conn.prepareStatement("select content from article where id=1");
rs = ps.executeQuery();
while(rs.next()) {
InputStreamReader isr = new InputStreamReader(rs.getBinaryStream("content"), "UTF-8");
BufferedReader br = new BufferedReader(isr);
//跳过size*currentPage个字符，从第(size*currentPage + 1)个字符开始读
br.skip(size * currentPage);
StringBuilder _str = new StringBuilder();
char[] buffer = new char[1024];
int count = 0;
while(br.read(buffer) != -1) {
if(count*1024 > 4096) {
hasNext = true; //如果br.read() != -1 则表明有下一页
break;
}
_str.append(buffer);
count ++;
}
out.println(_str);
}
rs.close();
ps.close();
conn.close();
%>
<br />
<div align="center">
<%
if((currentPage - 1) >= 0) {
out.println("<a href="/" mce_href="/""index.jsp?p=" + (currentPage - 1) + "/" >上一页</a> ");
} else {
out.println("<a >上一页</a> ");
}
if(hasNext) {
out.println("<a href="/" mce_href="/""index.jsp?p=" + (currentPage + 1) + "/" >下一页</a>");
} else {
out.println("<a >下一页</a>");
}
%>
</div>
</body>
</html>
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