我在mysql数据库中存储了8天的数据。我想每15分钟在jsp页面中检索这些数据。请给出一些提示来解决我的问题..
答案 0 :(得分:0)
在JavaScript中:
setInterval(function() {
// Do your XHR request here
console.log("I'm going to get me some data");
}, 900000);
jQuery的.get,.post或.ajax将使XHR请求变得容易。
答案 1 :(得分:-1)
最简单的方法是在JSP的头文件中创建元刷新。
<head>
<meta http-equiv="refresh" content="30">
</head>
http://www.w3schools.com/tags/att_meta_http_equiv.asp
用于获取数据:
<%@ page import="java.sql.*" %>
<% Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); %>
<HTML>
<HEAD>
<TITLE>Fetching Data From a Database</TITLE>
</HEAD>
<BODY>
<H1>Database Lookup</H1>
<FORM ACTION="self.jsp" METHOD="POST">
Please enter the ID of the publisher you want to find:
<BR>
<INPUT TYPE="TEXT" NAME="id">
<BR>
<INPUT TYPE="SUBMIT" value="Submit">
</FORM>
<H1>Fetching Data From a Database</H1>
<%
Connection connection = DriverManager.getConnection(
"jdbc:odbc:data", "userName", "password");
Statement statement = connection.createStatement();
String id = request.getParameter("id");
ResultSet resultset =
statement.executeQuery("select * from tableName where id = '" + id + "'") ;
if(!resultset.next()) {
out.println("Sorry, could not find that publisher. " +
"Please <A HREF='tryAgain.html'>try again</A>.");
} else {
%>
<TABLE BORDER="1">
<TR>
<TH>ID</TH>
<TH>Name</TH>
<TH>City</TH>
<TH>State</TH>
<TH>Country</TH>
</TR>
<TR>
<TD> <%= resultset.getString(1) %> </TD>
<TD> <%= resultset.getString(2) %> </TD>
<TD> <%= resultset.getString(3) %> </TD>
<TD> <%= resultset.getString(4) %> </TD>
<TD> <%= resultset.getString(5) %> </TD>
</TR>
</TABLE>
<BR>
<%
}
%>
</BODY>