below is my jsp code from html it is taking any csv ox xls file ,if in that xls file float having string ,then it must throw number format exception,but it is showing null pointer exception
CODE
<%@ page contentType="text/html;charset=windows-1252"%>
<%@ page import ="java.sql.*" %>
<%@ page import ="java.io.*" %>
<%@ page import ="java.net.*" %>
<%@ page import ="java.util.*" %>
<%@page pageEncoding="UTF-8"%>
<%@ page import ="javax.naming.InitialContext" %>
<%@ page import ="java.sql.PreparedStatement.*" %>
<%@ page import ="java.lang.*" %>
<html>
<head><head>
<body>
<form name="upload" method="get">
<%
try {
String up2=request.getParameter("up1");
String InputFileName =up2;
File file1= new File(InputFileName);
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String s19 = "Driver={Microsoft Excel Driver (*.xls)};DBQ=" + file1+ ";READONLY=false;";
Connection conn = DriverManager.getConnection("jdbc:odbc:" + s19, "", "");
System.out.println("Connection made successfully to the excel sheet");
DatabaseMetaData databasemetadata = conn.getMetaData();
Statement statement1 = conn.createStatement();
ResultSet resultset2 = databasemetadata.getTables(null, null, null, null);
Vector vector = new Vector();
for(; resultset2.next(); vector.add(resultset2.getString(3)));
resultset2.close();
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery( "Select * from ["+vector.get(0)+"]" );
while (rs.next()) {
try {
String SYMBOL=rs.getString(1);
float OPEN=Float.parseFloat(rs.getString(2));
float HIGH=Float.parseFloat(rs.getString(3));
float LOW=Float.parseFloat(rs.getString(4));
float CLOSE=Float.parseFloat(rs.getString(5));
float LAST=Float.parseFloat(rs.getString(6));
float PREVCLOSE=Float.parseFloat(rs.getString(7));
float TOTTRDQTY=Float.parseFloat(rs.getString(8));
float TOTTRDVAL=Float.parseFloat(rs.getString(9));
String TIMESTAMP=rs.getDate(10).toString();
if(OPEN==0.0 || HIGH==0.0 || LOW==0.0 || CLOSE==0.0|| LAST==0.0 ||PREVCLOSE==0.0||TOTTRDQTY==0.0||TOTTRDVAL==0.0 ){
throw new Exception("it should not be equal to 0");
}
boolean flag=false;
try{
Class.forName("com.ashna.jturbo.driver.Driver");
Connection con;
con=DriverManager.getConnection("jdbc:JTurbo://10.1.33.20:1433/ganesh","estar","eagle");
Statement st1=con.createStatement();
ResultSet result=st1.executeQuery("SELECT TSYMBOL,TOPENS,THIGH,TLOWS,TCLOSES,TLASTS,TPREVCLOSE,TTOTTRDQTY,TTOTTRDVAL,TTIME
STAMP FROM NSE2");
if(result.next())
{
do {
String SYMBOL1=result.getString("TSYMBOL");
float OPENS1=result.getFloat("TOPENS");
float HIGH1=result.getFloat("THIGH");
float LOWS1=result.getFloat("TLOWS");
float CLOSES1=result.getFloat("TCLOSES");
float LASTS1=result.getFloat("TLASTS");
float PREVCLOSE1=result.getFloat("TPREVCLOSE");
float TOTTRDQTY1=result.getFloat("TTOTTRDQTY");
float TOTTRDVAL1=result.getFloat("TTOTTRDVAL");
String TIMESTAMP1=result.getDate("TTIMESTAMP").toString();
//out.write("get" + SYMBOL1);
if (SYMBOL1.equals(SYMBOL) && TIMESTAMP1.equals(TIMESTAMP))
{
flag=true;
break;
}
}while(result.next());
}
if(flag==true)
{
st1.executeUpdate("UPDATE NSE2 SET TOPENS="+OPEN+",THIGH="+HIGH+",TLOWS="+LOW+",TCLOSES="+CLOSE+",TLASTS="+LAST+",TPREVCLOSE="+PREVCLOSE+",TTOTTRDQTY="+TOTTRDQTY+",TTOTTRDVAL="+TOTTRDVAL+" WHERE TSYMBOL='"+SYMBOL+"' AND TTIMESTAMP='"+TIMESTAMP+"' ");
}
else {
st1.executeUpdate("INSERT INTO NSE2 VALUES('"+SYMBOL+"',"+OPEN+", "+HIGH+","+LOW+", "+CLOSE+","+LAST+","+PREVCLOSE+","+TOTTRDQTY+","+TOTTRDVAL+",'"+TIMESTAMP+"')");
}
}
catch(SQLException e)
{
out.write(e.getMessage());
}
}
catch(Exception e2){
out.write("Error"+e2);
out.write(" \n");
}
}
rs.close();
st.close();
conn.close();
%>
<center> <h3> data is inserted </h3> </center>
<%
}
catch(Exception e){
out.write(e.getMessage());
%>
<center><h3>DATA is not INSERTED</h3></center>
<% }
%>
</form>
</body>
</html>
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