求解决，jsp连接数据库报错

HTTP Status 500 - An exception occurred processing JSP page /index.jsp at line 63

type Exception report

message An exception occurred processing JSP page /index.jsp at line 63

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 /index.jsp at line 63

60:          String password = "sa";  
61:          String url="jdbc:sqlserver://localhost:1433;DatabaseName="+dateBaseName;
62:         
63:          Connection conn=DriverManager.getConnection(url,username,password);   
64:         
65:          System.out.println("鏁版嵁搴撹繛鎺�锛�);  
66:     


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:567)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:454)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

javax.servlet.ServletException: java.sql.SQLException: No suitable driver found for jdbc:sqlserver://localhost:1433;DatabaseName=School
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:908)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:837)
    org.apache.jsp.index_jsp._jspService(index_jsp.java:176)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:431)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

[ 本帖最后由 yh612510 于 2015-5-7 14:02 编辑 ]