Servlet Assignment Problem

Greenhorn

Posts: 21

posted 18 years ago

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I'm new to Servlets and I am having a little trouble with an assignment. The assignment was to create an html form where the person enters First Name, Last Name, Address, Phone Number Fax Number, and email address, and a servlet that processes the information. The servlet should also check to see that all of the values are entered and display the information they entered. If any values are missing, it sends a page back to the user telling them to enter the information, with an "*" next to the fields that are missing.
I am having a problem with the logic getting the form to submit again, and filling in the fields in the form that were already entered. Thanks in advance for your help

Code for Servlet -

{public void doPost(HttpServletRequest req, HttpServletResponse resp)
{
String firstName;
String lastName;
String address;
String phoneNumber;
String faxNumber;
String emailAddress;
boolean incomplete=false;
StringBuffer sBuff = new StringBuffer("");

//
// was form submitted
//
firstName=req.getParameter("first name");
if (firstName == null) {return;}

//
//check if form was not completed properly
//
if (firstName.equals("")) incomplete=true;

lastName=req.getParameter("last name");
if (lastName.equals("")) incomplete=true;

address=req.getParameter("address");
if (address.equals("")) incomplete=true;

phoneNumber= req.getParameter("phone number");
if (phoneNumber.equals("")) incomplete=true;

faxNumber=req.getParameter("fax number");
if (faxNumber.equals("")) incomplete=true;

emailAddress=req.getParameter("email address");
if (emailAddress.equals("")) incomplete=true;

try{
PrintWriter pw=resp.getWriter();
pw.println("<HTML>");
pw.println("<HEAD><TITLE>Info.html</TITLE></HEAD>");
pw.println("<BODY>");
pw.println("<FORM ACTION=\"ProcessInfo\" Method=\"Post\">");

if(incomplete) 
pw.println("<h3>Please Enter All Information<br></h4>");

sBuff.replace(0, sBuff.length(), "First Name: <Input Type=\"Text\" Name=first name\"Value=\""+firstName+"\"><br>");
if ( firstName.equals("") ) sBuff.insert(0, "*");
pw.println(sBuff.toString());

sBuff.replace(0, sBuff.length(), "Last Name: <Input Type=\"Text\" Name=last name\"Value=\""+lastName+"\"><br>");
if ( lastName.equals("") ) sBuff.insert(0, "*");
pw.println(sBuff.toString());

sBuff.replace(0, sBuff.length(), "Address: <Input Type=\"Text\" Name=address\"Value=\""+address+"\"><br>");
if ( address.equals("") ) sBuff.insert(0, "*");
pw.println(sBuff.toString());

sBuff.replace(0, sBuff.length(), "Phone Number: <Input Type=\"Text\" Name=phone number\"Value=\""+phoneNumber+"\"><br>");
if ( phoneNumber.equals("") ) sBuff.insert(0, "*");
pw.println(sBuff.toString());

sBuff.replace(0, sBuff.length(), "Fax Number: <Input Type=\"Text\" Name=fax number\"Value=\""+faxNumber+"\"><br>");
if ( faxNumber.equals("") ) sBuff.insert(0, "*");
pw.println(sBuff.toString());

sBuff.replace(0, sBuff.length(), "Email Address: <Input Type=\"Text\" Name=email address\"Value=\""+emailAddress+"\"><br>");
if ( emailAddress.equals("") ) sBuff.insert(0, "*");
pw.println(sBuff.toString());

if(incomplete) 
pw.println("<input Type=\"Submit\" Value=\"Submit\"><br><br>");

else
pw.println("<br><br><hr>");

pw.println("For First Name you entered:" + firstName + "<BR>");
pw.println("For Last Name you entered:" + lastName + "<BR>");
pw.println("For Address you entered:" + address + "<BR>");
pw.println("For Pnone Number you entered:" + phoneNumber + "<BR>");
pw.println("For Fax Number you entered:" + faxNumber + "<BR>");
pw.println("For Email Address you entered:" + emailAddress + "<BR>");
pw.println("</FORM>");
pw.println("</BODYy>");
pw.println("</HTML>");
pw.close();

}catch(java.io.IOException eio) {}
}
public String getServletInfo() {return "ProcessInfo Servlet";
}
}
Code for html -
<HTML>
<HEAD><TITLE>Info.html
</TITLE></HEAD>
<BODY>
<BASEFONT SIZE=2 COLOR=BLACK FACE="Times New Roman">
<FORM Action="ProcessInfo" method="post">
<table border=0>
<tr><td align=right>First Name:</td>
<td align=left><INPUT TYPE ="TEXT" name="first name" size="20" </td></tr>
<tr><td align=right>Last Name: </td>
<td align=left><INPUT TYPE ="TEXT" name="last name" size="30"> </td></tr>
<tr><td align=right>Address:  </td>
<td align=left><INPUT TYPE ="TEXT" name="address" size="50"></td></tr>
<tr><td align=right>Phone Number: </td>
<td align=left><INPUT TYPE ="TEXT" name="phone number" size="12"></td></tr>
<tr><td align=right>Fax Number:  </td>
<td align=left><INPUT TYPE ="TEXT" name="fax number" size="12"></td></tr>
<tr><td align=right>Email Address:  </td>
<td align=left><INPUT TYPE ="TEXT" name="email address" size="30"></td></tr>
<tr><td><INPUT TYPE="SUBMIT"  VALUE="Submit"></td></tr>
<BR>
</table>
</FORM>
</BODY>
</HTML>

Randy Helene

Greenhorn

Posts: 21

posted 18 years ago

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Never mind. I found my problems and got it working. Thanks anyway.
Randy

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