problem with connecting jsp page with mysql

I have written this code in Jsp file .

<% 
Connection con=null;
Statement st=null;
PreparedStatement ps;

String nm=request.getParameter("tnm");
String loc=request.getParameter("tlc");

  try
 {
    Class.forName("com.mysql.jdbc.Driver");
	con=DriverManager.getConnection("jdbc:mysql://localhost:3306/rahul","root","root");
	 st=con.createStatement();
	 try
	 {
		ps=con.prepareStatement("insert into dept(deptname,location) values(?,?)");
	
			ps.setString(1,nm);
			ps.setString(2,loc);
		
			ps.executeUpdate();
			out.println("Value inserted ");
	 }
	 catch(SQLException e)
	 {
	 	out.println("sql is not executed");
	 }
	}
	catch(Exception ex)
	{
	out.println(ex.toString());
	
	}

 %>

i have made proper connection with mysql-bin jar file.
one day before 1 prg of dbase was running but today
But its giving this error

java.sql.SQLException: Communication link failure: java.io.IOException, underlying cause: Unexpected end of input stream ** BEGIN NESTED EXCEPTION ** java.io.IOException MESSAGE: Unexpected end of input stream STACKTRACE: java.io.IOException: Unexpected end of input stream at com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:1096) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:626) at com.mysql.jdbc.Connection.createNewIO(Connection.java:1562) at com.mysql.jdbc.Connection.(Connection.java:491) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at org.apache.jsp.insert_jsp._jspService(insert_jsp.java:63) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265) at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685) at java.lang.Thread.run(Unknown Source) ** END NESTED EXCEPTION **

If there is any problem with setting of Webapps folder.
plz help me any body.