Connection refused: connect请高手帮忙看一下，愁死了，这是怎么回事

HTTP Status 500 - --------------------------------------------------------------------------------type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: javax.servlet.ServletException: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.ConnectException
MESSAGE: Connection refused: connectSTACKTRACE:java.net.ConnectException: Connection refused: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:256)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:271)
at com.mysql.jdbc.Connection.createNewIO(Connection.java:2771)
at com.mysql.jdbc.Connection.<init>(Connection.java:1555)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at org.apache.jsp.corrision.index_jsp._jspService(index_jsp.java:82)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:856)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)
at java.lang.Thread.run(Unknown Source)
** END NESTED EXCEPTION **请高手帮忙看一下，愁死了，这是怎么回事，我都弄了一个多星期了，我的服务器是tomcat,我的数据库是mysql，我的源程序是jsp的，刚开始学jsp，请高手指点

解决方案 »

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<%@ page contentType="text/html;charset=GBK" %>
<%@ include file="conn/config.jsp"%>
<%@ include file="conn/conn.jsp"%>
<%rs=stmt.executeQuery("select * from member where systemop=1 and flag=1");
if(rs.next()){
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE><%=systemname%></TITLE>
<BASE onmouseover="window.status='<%=systemname%>';return true">
<link REL = "Shortcut Icon" href="images/cpt.ico">
<META http-equiv=Content-Type content="text/html; charset=GBK"><LINK
href="images/font.css" type=text/css rel=stylesheet>
<META content="MSHTML 6.00.2800.1479" name=GENERATOR>
<STYLE type=text/css>.login {
BORDER-RIGHT: #d1d1d1 1px solid; BORDER-TOP: #d1d1d1 1px solid; FONT-SIZE: 12px; BORDER-LEFT: #d1d1d1 1px solid; BORDER-BOTTOM: #d1d1d1 1px solid; FONT-FAMILY: "宋体"
}
.font {
FONT-SIZE: 12px; FONT-FAMILY: "宋体"; TEXT-DECORATION: none
}.form {
BORDER-RIGHT: #999999 1px solid; BORDER-TOP: #999999 1px solid; FONT-SIZE: 12px; BORDER-LEFT: #999999 1px solid; BORDER-BOTTOM: #999999 1px solid; FONT-FAMILY: "宋体"
}
</STYLE>
</HEAD>
<BODY leftMargin=0 background=images/back.gif topMargin=0 marginwidth="0"
marginheight="0">
<TABLE height="100%" cellSpacing=1 width="100%" border=0>
  <TBODY>
  <TR>
    <TD>
      <TABLE class=login height=389 cellSpacing=10 cellPadding=0 width="70%"
      align=center bgColor=#f3f3f3 border=0>
        <TBODY>
        <TR>
          <TD class=login bgColor=#ffffff height=369>
            <form name="form1" method="post"  action="Check.jsp">
            <TABLE cellSpacing=0 cellPadding=0 width=574 align=center
              border=0><TBODY>
              <TR>
                <TD width=27><IMG height=300 src="images/login_main_02.jpg"
                  width=162></TD>
                <TD vAlign=top width=547>
                  <TABLE cellSpacing=0 cellPadding=0 width=412 border=0>
                    <TBODY>
                    <TR>
                      <TD><IMG height=116 src="images/login_main_03.gif"
                        width=412></TD></TR>
                    <TR>
                      <TD background=images/login_main_05.gif height=65>
                        <TABLE cellSpacing=0 cellPadding=0 width=350
                        align=center border=0>
                          <TBODY>
                          <TR>
                            <TD class=font width=69>
                              <DIV align=right>用户名：</DIV></TD>
                            <TD width=106><INPUT class=form tabIndex=1
                              maxLength=20 size=15 name=username id=username></TD>
                            <TD width=175 rowSpan=2> <INPUT tabIndex=3
                              type=image height=47 width=125
                              src="images/login_main_09.gif" border=0
                              name=image></TD></TR>
                          <TR>
                            <TD class=font>
                              <DIV align=right>密　码：</DIV></TD>
                            <TD><INPUT class=form tabIndex=2 type=password
                              maxLength=20 size=15
                        name=password id=password></TD></TR></TBODY></TABLE></TD></TR>
                    <TR>
                      <TD><map name="FPMap0">
                        <area href="findpass.jsp" shape="rect" coords="65, 9, 150, 29">
                        <area href="reg.jsp" shape="rect" coords="237, 7, 334, 30"></map><IMG height=119 src="images/login_main_04.gif"
                        width=412 useMap=#FPMap0 border=0></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></FORM><%}else{
response.sendRedirect("install.jsp");
}%>
</bODY></HTML>
这是我的index.jsp的代码
connect refused what's wrong ,who can help me??