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我想从jsp页面上的mysql数据库检索数据,当页面加载时,它加载最新数据(这是我想要的),但是当我点击在刷新按钮上,我使用旧数据刷新表格,然后该按钮不起作用(不刷新表格)。在jsp中用按钮刷新mysql表
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="java.sql.*, javax.sql.*, java.io.*, javax.naming.*"%>
<!DOCTYPE html>
<html>
<head>
<title>Main Page</title>
<h1>
<strong>test page</strong>
</h1>
<hr />
<canvas id="mycanvas" width="400" height="186"></canvas>
<script src="JavaScript/smoothie.js"></script>
<script src="JavaScript/chart.js"></script>
<script src="JavaScript/basic.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#refresh").click(function(){
$("#heart_rate").load("basic2.jsp")
});
});
</script>
</head>
<body>
<br>
<br>
<button id="refresh">Refresh table</button>
<br>
<br>
<form method="post" name="form">
<table id="heart_rate" border="1">
<tr>
<th>Sensor id</th>
<th>Time stamp</th>
<th>Heart rate</th>
<th>Event time</th>
</tr>
<%
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "Avantidrome";
String driver = "com.mysql.jdbc.Driver";
String un ="root";
String pw="root";
Statement st;
try{
Class.forName(driver).newInstance();
con = DriverManager.getConnection(url + db, un, pw);
String sql = "select * from avantidrome.heartratedata order by timestamp DESC limit 10";
st = con.createStatement();
ResultSet rs = st.executeQuery(sql);
%>
<%
while(rs.next())
{
%>
<tr>
<td><%=rs.getString(1)%></td>
<td><%=rs.getString(2)%></td>
<td><%=rs.getString(4)%></td>
<td><%=rs.getString(5)%></td>
</tr>
<%
}
%>
<%
} catch(Exception e){
e.printStackTrace();
}
%>
</table>
</form>
</body>
</html>
一旦按钮被点击它调用basic.jsp这仅仅是:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="java.sql.*, javax.sql.*, java.io.*, javax.naming.*"%>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<br>
<br>
<form method="post" name="form">
<table id="heart_rate" border="1">
<tr>
<th>Sensor id</th>
<th>Time stamp</th>
<th>Heart rate</th>
<th>Event time</th>
</tr>
<%
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "Avantidrome";
String driver = "com.mysql.jdbc.Driver";
String un ="root";
String pw="root";
Statement st;
try{
Class.forName(driver).newInstance();
con = DriverManager.getConnection(url + db, un, pw);
String sql = "select * from avantidrome.heartratedata order by timestamp DESC limit 10";
st = con.createStatement();
ResultSet rs = st.executeQuery(sql);
%>
<%
while(rs.next())
{
%>
<tr>
<td><%=rs.getString(1)%></td>
<td><%=rs.getString(2)%></td>
<td><%=rs.getString(4)%></td>
<td><%=rs.getString(5)%></td>
</tr>
<%
}
%>
<%
} catch(Exception e){
e.printStackTrace();
}
%>
</table>
</form>
</body>
</html>
所有它需要做的是按钮,从数据库中选择最新的数据并返回到表被点击时。
快问,你为什么不使用servlet? – 2015-02-08 23:19:24