我刚开始学JSP，从别人那里弄来个源程序，服务器用的是tomcat6.16，数据库用的是mysql5.0，开始不知道怎样连接，后来从网上查了些资料，用JDBC5.08连接，但是弄了几天就是打不开，浏览器上显示如下，麻烦高手指点一下
HTTP Status 500 -

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type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: An exception occurred processing JSP page /corrision/conn/conn.jsp at line 14

11: String dbUrl="jdbc:mysql://localhost:3306/OA?useUnicode=true&characterEncoding=GBK";
12: String dbUser="root";
13: String dbPwd="123456";
14: con=java.sql.DriverManager.getConnection(dbUrl,dbUser,dbPwd);
15: stmt=con.createStatement();
16: %>


Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


root cause

javax.servlet.ServletException: com.mysql. Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **