jsp链接mysql数据库，报错：java.sql.SQLException: No suitable driver found for jdbc

我这个项目运行很久了，今天突然报错说找不到驱动
而且错误都是出现在JSP页面上，我同一个项目下的java程序链接数据库都没问题，请问这是什么原因？我试过重新下载一个驱动，还是同样结果，java程序运行没问题，JSP就报错
以下是JSP页面代码，求助求助！<%@ page language="java"%>
<%@ page import="java.sql.*"%> 
<%@page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<HTML>
<HEAD>
<TITLE>FusionCharts Free - Database And Connection Class Example</TITLE>
<SCRIPT LANGUAGE="Javascript" SRC="FusionCharts/FusionCharts.js"></SCRIPT>
<style type="text/css">
<!--
body {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
}
.text{
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
}
-->
</style>
</HEAD>
<BODY>
<CENTER>
<h2><a href="http://www.fusioncharts.com" target="_blank">FusionCharts Free</a> Database and Connection Class Example</h2>
<%
    Connection con = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/rv_mining","root","123123");
Statement st1=null,st2=null;
ResultSet rs1=null,rs2=null;
//strXML will be used to store the entire XML document generated
String strXML="";

//Generate the chart element
strXML = "<graph caption='Factory Output report' subCaption='By Quantity' decimalPrecision='0' showNames='1'  numberSuffix=' Units'  pieSliceDepth='30' formatNumberScale='0'>";

try {
st1=con.createStatement();
rs1=st1.executeQuery("select phone_id from rvm_phoneinfo");

int pid = 0;
//Iterate through each factory
while(rs1.next()) {
pid=rs1.getInt("phone_id");
//Now create second recordset to get details for this factory
//Construct the query to retrieve data
int P = 0;
//int N = 0;
String tid = null;
st2=con.createStatement();
rs2 = st2.executeQuery("select * from rvm_chart where phone_id="+pid+"");
while(rs2.next()){
tid=rs2.getString("para_id");
P = rs2.getInt("P_value");
//N = rs2.getInt("N_value");
strXML += "<set name='" + tid + "' value=" +P+ "/>";
}
rs2.close();
st2.close();
} //end of while
rs1.close();
st1.close();
con.close();
}catch(SQLException e) {
    e.printStackTrace();
}
//Finally, close <graph> element
strXML += "</graph>";
//close the resulset,statement,connection
//Create the chart - Pie 3D Chart with data from strXML
%> 
<jsp:include page="includes/FusionChartsRenderer.jsp" flush="true"> 
<jsp:param name="chartSWF" value="FusionCharts/FCF_Pie3D.swf" /> 
<jsp:param name="strURL" value="" /> 
<jsp:param name="strXML" value="<%=strXML %>" /> 
<jsp:param name="chartId" value="FactorySum" /> 
<jsp:param name="chartWidth" value="650" /> 
<jsp:param name="chartHeight" value="450" /> 
<jsp:param name="debugMode" value="false" /> 
<jsp:param name="registerWithJS" value="false" /> 
</jsp:include>
<BR>
<BR>
<a href='../NoChart.html' target="_blank">Unable to see the chart above?</a><BR><H5 ><a href='../default.htm'>&laquo; Back to list of examples</a></h5>
</CENTER>
</BODY>
</HTML>