Question: Programming error

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Harshu
Programming error
2 Answer(s)      7 years ago
Posted in : JSP-Servlet
<%--<%@ page language="java" import="java.sql.*" %>
<%

Connection con=null;
ResultSet rs=null;
Statement stmt=null;

try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con=DriverManager.getConnection("jdbc:odbc:Advdsn");
stmt=con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet_CONCUR_READ_ONLY);
rs=s.executeQuery("select OrderNo from OrderTab");
while(rs.last())
{
int Ono=Integer.parseInt(rs.getInt(1));
int No=Ono+1;
}
}
catch(SQLException se)
{out.println("Database error="+se.getMessage());
}

catch(Exception e)
{out.println("Error="+e.getMessage());
}


%>--%>


<HTML>
<HEAD>
<TITLE> Place Order </TITLE>
<script type="text/javascript">
function Validate()
{
var valid=true;
if(document.forms.OrderNo.value=="")
{ alert("Please enter valid OrderNo");
valid=false;
}
if(document.forms.Name.value=="")
{ alert("Please enter valid Client's Name");
valid=false;
}
if(document.forms.Address.value=="")
{ alert("Please enter valid Client's Address");
valid=false;
}
if(document.forms.Email.value=="")
{ alert("Please enter valid Email ID");
valid=false;
}
if(document.forms.PhoneNo.value=="")
{ alert("Please enter valid PhoneNo");
valid=false;
}
return valid;
}
</script>
</HEAD>

<BODY BGCOLOR="lightblue">
<marquee behavior="alternate" scrollamount=5 scrolldelay=10>
<h1><font size=4 face="Stroustroup" color="#993355">Advertisement Management System</h1></font></marquee><br>

<hr color="green">
<form method="post" onsubmit="return Validate();" name="forms" action="http://localhost:8080/ProjectAd/Orders">
<p align=center><b>Order No:&nbsp;&nbsp;&nbsp;<input type=text name="OrderNo" size=25 value<%="No"%></b>
<p align=center><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Name:&nbsp;&nbsp;&nbsp;<input type=text name="Name" size=25 ></b>
<p align=center><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Address:&nbsp;&nbsp;<textarea name="Address" rows=5 cols=25 size=25></textarea></b>
<p align=center><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Email:&nbsp;&nbsp;<input type=text name="Email" size=25></b>
<p align=center><b>PhoneNo:&nbsp;&nbsp;<input type=text name="PhoneNo" size=25></b><br><br>
<p align=center><b><a href="http://localhost:8080/ProjectAd/Orders"><input type=submit name=submit value="Insert Order"></a></b>
<b><input type=reset name=reset value="Reset"></b>
<a href="http://localhost:8080/ProjectAd/Update.jsp"><b><h4 align=center>Update Orders</h4></b></a>
<a href="http://localhost:8080/ProjectAd/Delete.jsp"><b><h4 align=center>Delete Orders</h4></b></a>
<a href="http://localhost:8080/ProjectAd/View.jsp"><b><h4 align=center>View Orders</h4></b></a>
<a href="http://localhost:8080/ProjectAd/PlaceOrd.jsp"><b><h4 align=center>Back </h4></b></a></p>
<p align=center><a href="http://localhost:8080/ProjectAd/MainPage.html"><img src="images/home_ap.jpg" height=20 width=20>MainPage</a>
</form>
<hr color="green">
</BODY>
</HTML>

how to validate email field where if @ is not given or (dot). is not given etc then it should display error and in phone no field people can enter only 8 or 10 digits no and no alphabet and in orderno people should not enter alphabet and in other 2 field such as name and pwd where user should not enter number please reply me and i want that the afterLast order no should come from database directly and should get display in orderno field and the other details along with the order no should get displayed in database then how to do this. please reply me .
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View Answers

January 23, 2010 at 1:29 PM


Hi Friend,

Try the following code:

1)modify.jsp:

<%@ page language="java" import="java.sql.*" %>
<%
Connection con=null;
ResultSet rs=null;
Statement stmt=null;
int No=0;
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con=DriverManager.getConnection("jdbc:odbc:access");
stmt=con.createStatement();
rs=stmt.executeQuery("select TOP 1 OrderNo from OrderTab ORDER BY OrderNo DESC");
while(rs.next())
{
int Ono=rs.getInt(1);
No=Ono+1;
}
}
catch(SQLException se)
{out.println("Database error="+se.getMessage());
}

catch(Exception e)
{out.println("Error="+e.getMessage());
}

%>

<HTML>
<HEAD>
<TITLE> Place Order </TITLE>
<script type="text/javascript">
function checkName(text) {
if(isNaN(text)){ return 1;}
else{alert("Invalid Name! The only charachters accepted are A - Z and a - z");return 0;}
}
function checkPhoneNumber(num) {
if(isNaN(num)){alert("Invalid Phone Number! The only characters permitted are 0 to 9"); return 0;}
else{return 1;}
}

function Validate()
{
var name=document.form.Name;
var phone=document.form.PhoneNo;
var email=document.form.Email;
if(document.form.OrderNo.value=="")
{ alert("Please enter valid OrderNo");
return false;
}
if(name.value=="")
{ alert("Please enter valid Client's Name");
return false;

}
if (checkName(name.value)==false){
name.value="";
name.focus();
return false;
}
if(document.form.Address.value=="")
{ alert("Please enter valid Client's Address");
return false;
}
if(email.value=="")
{ alert("Please enter valid Email Id");
return false;
}
apos=email.value.indexOf("@")
dotpos=email.value.lastIndexOf(".")
if (apos<1 || dotpos-apos<2)
{
alert("Invalid Email Id")
email.value=="";
email.focus();
return false;
}

if(phone.value=="")
{ alert("Please enter valid PhoneNo");
return false;
}
if (checkPhoneNumber(phone.value)==false){
phone.value="";
phone.focus();
return false;
}
return true;
}
</script>
</HEAD>

<BODY BGCOLOR="lightblue">
<marquee behavior="alternate" scrollamount=5 scrolldelay=10>
<h1><font size=4 face="Stroustroup" color="#993355">Advertisement Management System</h1></font></marquee><br>

<hr color="green">


January 23, 2010 at 1:30 PM


continue...

<form name="form" method="post" action="insert.jsp" onsubmit="return Validate();">
<center>
<table>
<tr><td>Order No:</td><td><input type="text" name="OrderNo" size=25 value="<%=No%>"></td></tr>
<tr><td>Name:</td><td><input type=text name="Name" size=25 ></td></tr>
<tr><td>Address:</td><td><textarea name="Address" rows=5 cols=25 size=25></textarea></td></tr>
<tr><td>Email:</td><td><input type=text name="Email" size=25></td></tr>
<tr><td>PhoneNo:</td><td><input type=text name="PhoneNo" size=25></td></tr>
<tr><td><input type=submit name=submit value="InsertOrder"></td><td><input type=reset name=reset value="Reset"></td></tr>
</table>
<a href="http://localhost:8080/ProjectAd/Update.jsp"><b><h4 align=center>Update Orders</h4></b></a>
<a href="http://localhost:8080/ProjectAd/Delete.jsp"><b><h4 align=center>Delete Orders</h4></b></a>
<a href="http://localhost:8080/ProjectAd/View.jsp"><b><h4 align=center>View Orders</h4></b></a>
<a href="http://localhost:8080/ProjectAd/PlaceOrd.jsp"><b><h4 align=center>Back </h4></b></a></p>
<p align=center><a href="http://localhost:8080/ProjectAd/MainPage.html"><img src="images/home_ap.jpg" height=20 width=20>MainPage</a>
</center>
</form>
<hr color="green">
</BODY>
</HTML>

2)insert.jsp:
<%@ page language="java" import="java.sql.*" %>
<%
try{
String no=request.getParameter("OrderNo");
String name=request.getParameter("Name");
String add=request.getParameter("Address");
String email=request.getParameter("Email");
String pno=request.getParameter("PhoneNo");

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:access");
Statement stmt=con.createStatement();
int i=stmt.executeUpdate("insert into OrderTab values('"+no+"','"+name+"','"+add+"','"+email+"','"+pno+"')");
out.println("Data is inserted successfully.");
}
catch(Exception e){}
%>

Thanks

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