in a text box and click on update button. once the button is click a function with parameter as the changed value. it is sent to a jsp file for updation.
when i try to run this code, it shows number format exception-input string undefined.
3  3819  Dormilich 8,658
Recognized Expert Moderator Expert
well, then you probably didn’t pass the value correctly somewhere.
but i could not find the error. been trying for long..
here s d code - <%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
-
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
-
<html>
-
<head>
-
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
-
<title>Untitled Document</title>
-
<%
-
// String id1=(String)session.getAttribute("user");
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// out.println("welcome "+id1+",ur shopping cart contains");
-
%>
-
-
<%!
-
String p,pn,c,q;
-
%>
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<SCRIPT language="javascript">
-
var xmlHttp,url;
-
-
-
-
function change1(p,val) //to check product availability and if available update the product table
-
{
-
// var d=window.document.getElementById("quantity");
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// var n=d.options[d.selectedIndex].value;
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xmlHttp=GetXmlHttpObject();
-
if (xmlHttp==null)
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{
-
alert ("Your browser does not support AJAX!");
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return;
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}
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url="https://localhost:8443/change.jsp";
-
-
// url=url+"?pwd="+n1+"&repwd="+n2;
-
-
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url=url+"?prod="+p+"&q="+val;
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xmlHttp.onreadystatechange=stateChanged;
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xmlHttp.open("GET",url,true);
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xmlHttp.send(null);
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}
-
-
-
function stateChanged()
-
{
-
-
if(xmlHttp.readyState==4)
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{
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document.getElementById("dataTable").innerHTML=xmlHttp.responseText;
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}
-
}
-
-
-
function GetXmlHttpObject()
-
{
-
if (window.XMLHttpRequest)
-
{
-
// code for IE7+, Firefox, Chrome, Opera, Safari
-
return new XMLHttpRequest();
-
}
-
if (window.ActiveXObject)
-
{
-
// code for IE6, IE5
-
return new ActiveXObject("Microsoft.XMLHTTP");
-
}
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return null;
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}
-
-
</SCRIPT>
-
</head>
-
<body>
-
-
<%
-
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
-
Connection con=DriverManager.getConnection("jdbc:odbc:ds");
-
-
Statement st = con.createStatement();
-
-
String q="SELECT * FROM \"ADMINISTRATOR\".USERID";
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ResultSet rs=st.executeQuery(q);
-
%>
-
-
<form name="formId" action="tot1.jsp" method="post">
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<table id="dataTable" border=2 bgcolor="#FFFFFF" cellpadding="5" cellspacing="2">
-
-
<tr>
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<TH>CHOOSE</TH>
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<th>PRODUCT ID</th>
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<th>PRODUCT NAME</th>
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<TH>COST</TH>
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<TH>QUANTITY</TH>
-
</tr>
-
<%
-
while(rs.next())
-
{
-
-
p=rs.getString("PID");
-
pn=rs.getString("PNAME");
-
c=rs.getString("COST");
-
-
%>
-
-
<tr>
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<td><input type="checkbox" name="uid" id="uid" value="<%= p%>" /></td>
-
<td ><%=p%> </td>
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<td ><%=pn%> </td>
-
<td ><%=c%> </td>
-
-
<td><input type="text" name="quantity" id="quantity" value="1" /></td>
-
-
</td>
-
</tr>
-
-
<%
-
}
-
%>
-
-
<tr>
-
<td><input type="button" name="update" value="Update cart" onClick="change1(document.formId.uid.value,document.formId.quantity.value)"
-
</td>
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<td><input type="button" name="add" value="Add more" onClick="window.location='http://localhost:8443/index2.jsp' " />
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</td>
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<td><input type="submit" name="submit" value="Checkout" />
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</td>
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</tr>
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</table>
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</form>
-
-
<%
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st.close();
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con.close();
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%>
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</body>
-
</html>
here s the jsp file to which the parameter is sent - <%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" errorPage="" %>
-
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
-
<%@ page import="java.io.*" %>
-
<%@ page import="java.lang.*" %>
-
-
<html xmlns="http://www.w3.org/1999/xhtml">
-
<head>
-
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
-
<title>Untitled Document</title>
-
</head>
-
<%!
-
String p,pn,c,sql,s1;
-
String update,update1;
-
int quantity;
-
%>
-
-
<body>
-
-
<%
-
String code=new String(request.getParameter("prod"));
-
String q=new String(request.getParameter("q"));
-
-
-
int ID=Integer.parseInt(code);
-
int qu=Integer.parseInt(q);
-
-
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
-
-
Connection con =DriverManager.getConnection("jdbc:odbc:ds");
-
Connection con1 =DriverManager.getConnection("jdbc:odbc:ds");
-
Connection con2 =DriverManager.getConnection("jdbc:odbc:ds");
-
Connection con3 =DriverManager.getConnection("jdbc:odbc:ds");
-
-
-
Statement stmt=con.createStatement();
-
Statement stmt1=con1.createStatement();
-
Statement stmt2=con2.createStatement();
-
Statement stmt3=con3.createStatement();
-
-
-
s1="SELECT * FROM ADMINISTRATOR.PRODUCT WHERE PID="+ID;
-
ResultSet rs=stmt1.executeQuery(s1);
-
-
while(rs.next())
-
{
-
p=rs.getString("quantity");
-
quantity=Integer.parseInt(p);
-
-
if(qu<quantity)
-
{
-
quantity=quantity-qu;
-
-
-
sql = "UPDATE ADMINISTRATOR.USERID SET QUANTITY="+qu+" WHERE PID= "+ID;
-
stmt.executeUpdate(sql);
-
-
update="UPDATE ADMINISTRATOR.PRODUCT SET QUANTITY="+quantity+" WHERE PID="+ID;
-
stmt1.executeUpdate(update);
-
-
update1="UPDATE ADMINISTRATOR.PROD SET QUANTITY="+quantity+" WHERE PID="+ID;
-
stmt2.executeUpdate(update1);
-
-
}
-
-
else if(qu>quantity)
-
{
-
// response.sendRedirect("https://localhost:8443/index1.jsp");
-
out.print(" REQUIRED QUANTITY NOT AVAILABLE");
-
}
-
}
-
stmt.close();
-
stmt1.close();
-
stmt2.close();
-
stmt3.close();
-
-
con.close();
-
con1.close();
-
con2.close();
-
con3.close();
-
-
%>
-
</body>
-
</html>
acoder 16,027
Recognized Expert Moderator MVP
When passing any URL parameters, encode them using encodeURIComponent().
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