Hello everyone,
Got a school project here.
I need to explain the code I use in general, thats the moral of this school project.
I thought to keep it simple(It actually doesn't matter if I wrote the code myself or that I got it from somewhere, as long as I can explain it.)so I thought to create a simple register form, send the data to the db and then being able to login.
I'm working with NetBeans, but somehow it gives me some errors.
Here's the code:
register.html
Netbeans gives me an error/warning at line 7 "<th bgcolor="#CCCCFF" colspan=2>"
Saying:"Unexpected tag <TH> found, expecting one of <TFOOT>, <CAPTION>, <TBODY>, <THEAD>, <COL>, <COLGROUP>"
If I run the file it works fine though.
<html>
<head><title>Register form</title></head>
<body>
<form action="/examples/jsp/forms/process.jsp" method=post>
<center>
<table cellpadding=4 cellspacing=2 border=0>
<th bgcolor="#CCCCFF" colspan=2>
<font size=5>USER REGISTRATION</font>
<br>
<font size=1><sup>*</sup> Required Fields</font>
</th>
<tr bgcolor="#c8d8f8">
<td valign=top>
<b>First Name<sup>*</sup></b>
<br>
<input type="text" name="firstName" value="" size=15 maxlength=20></td>
<td valign=top>
<b>Last Name<sup>*</sup></b>
<br>
<input type="text" name="lastName" value="" size=15 maxlength=20></td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top>
<b>E-Mail<sup>*</sup></b>
<br>
<input type="text" name="email" value="" size=25 maxlength=125>
<br></td>
<td valign=top>
<b>Zip Code<sup>*</sup></b>
<br>
<input type="text" name="zip" value="" size=5 maxlength=5></td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top colspan=2>
<b>User Name<sup>*</sup></b>
<br>
<input type="text" name="userName" size=10 value="" maxlength=10>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top>
<b>Password<sup>*</sup></b>
<br>
<input type="password" name="password1" size=10 value=""
maxlength=10></td>
<td valign=top>
<b>Confirm Password<sup>*</sup></b>
<br>
<input type="password" name="password2" size=10 value=""
maxlength=10></td>
<br>
<tr bgcolor="#c8d8f8">
<td valign=top colspan=2>
<b>What music are you interested in?</b>
<br>
<input type="checkbox" name="faveMusic"
value="Rock">Rock
<input type="checkbox" name="faveMusic" value="Pop">Pop
<input type="checkbox" name="faveMusic" value="Bluegrass">Bluegrass<br>
<input type="checkbox" name="faveMusic" value="Blues">Blues
<input type="checkbox" name="faveMusic" value="Jazz">Jazz
<input type="checkbox" name="faveMusic" value="Country">Country<br>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top colspan=2>
<b>Would you like to receive e-mail notifications on our special
sales?</b>
<br>
<input type="radio" name="notify" value="Yes" checked>Yes
<input type="radio" name="notify" value="No" > No
<br><br></td>
</tr>
<tr bgcolor="#c8d8f8">
<td align=center colspan=2>
<input type="submit" value="Submit"> <input type="reset"
value="Reset">
</td>
</tr>
</table>
</center>
</form>
</body>
</html>process.jsp
<%@ page import="java.util.*" %>
<%!
ResourceBundle bundle =null;
public void jspInit() {
bundle = ResourceBundle.getBundle("forms");
}
%>
<jsp:useBean id="formHandler" class="foo.FormBean" scope="request">
<jsp:setProperty name="formHandler" property="*"/>
</jsp:useBean>
<%
if (formHandler.validate()) {
%>
<jsp:forward page="<%=bundle.getString(\"process.success\")%>"/>
<%
} else {
%>
<jsp:forward page="<%=bundle.getString(\"process.retry\")%>"/>
<%
}
%>FormBean.java
package foo;
import java.util.*;
public class FormBean {
private String firstName;
private String lastName;
private String email;
private String userName;
private String password1;
private String password2;
private String zip;
private String[] faveMusic;
private String notify;
private Hashtable errors;
public boolean validate() {
boolean allOk=true;
if (firstName.equals("")) {
errors.put("firstName","Please enter your first name");
firstName="";
allOk=false;
}
if (lastName.equals("")) {
errors.put("lastName","Please enter your last name");
lastName="";
allOk=false;
}
if (email.equals("") || (email.indexOf('@') == -1)) {
errors.put("email","Please enter a valid email address");
email="";
allOk=false;
}
if (userName.equals("")) {
errors.put("userName","Please enter a username");
userName="";
allOk=false;
}
if (password1.equals("") ) {
errors.put("password1","Please enter a valid password");
password1="";
allOk=false;
}
if (!password1.equals("") && (password2.equals("") ||
!password1.equals(password2))) {
errors.put("password2","Please confirm your password");
password2="";
allOk=false;
}
if (zip.equals("") || zip.length() !=5 ) {
errors.put("zip","Please enter a valid zip code");
zip="";
allOk=false;
} else {
try {
int x = Integer.parseInt(zip);
} catch (NumberFormatException e) {
errors.put("zip","Please enter a valid zip code");
zip="";
allOk=false;
}
}
return allOk;
}
public String getErrorMsg(String s) {
String errorMsg =(String)errors.get(s.trim());
return (errorMsg == null) ? "":errorMsg;
}
public FormBean() {
firstName="";
lastName="";
email="";
userName="";
password1="";
password2="";
zip="";
faveMusic = new String[] { "1" };
notify="";
errors = new Hashtable();
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
public String getEmail() {
return email;
}
public String getUserName() {
return userName;
}
public String getPassword1() {
return password1;
}
public String getPassword2() {
return password2;
}
public String getZip() {
return zip;
}
public String getNotify() {
return notify;
}
public String[] getFaveMusic() {
return faveMusic;
}
public String isCbSelected(String s) {
boolean found=false;
if (!faveMusic[0].equals("1")) {
for (int i = 0; i < faveMusic.length; i++) {
if (faveMusic[i].equals(s)) {
found=true;
break;
}
}
if (found) return "checked";
}
return "";
}
public String isRbSelected(String s) {
return (notify.equals(s))? "checked" : "";
}
public void setFirstName(String fname) {
firstName =fname;
}
public void setLastName(String lname) {
lastName =lname;
}
public void setEmail(String eml) {
email=eml;
}
public void setUserName(String u) {
userName=u;
}
public void setPassword1(String p1) {
password1=p1;
}
public void setPassword2(String p2) {
password2=p2;
}
public void setZip(String z) {
zip=z;
}
public void setFaveMusic(String[] music) {
faveMusic=music;
}
public void setErrors(String key, String msg) {
errors.put(key,msg);
}
public void setNotify(String n) {
notify=n;
}
}retry.jsp
<jsp:useBean id="formHandler" class="foo.FormBean" scope="request"/>
<html>
<body>
<form action="process.jsp" method=post>
<center>
<table cellpadding=4 cellspacing=2 border=0>
<th bgcolor="#CCCCFF" colspan=2>
<font size=5>USER REGISTRATION</font>
<br>
<font size=1><sup>*</sup> Required Fields </font>
</th>
<tr bgcolor="#c8d8f8">
<td valign=top>
<B>First Name<sup>*</sup></B>
<br>
<input type="text" name="firstName"
value='<%=formHandler.getFirstName()%>' size=15 maxlength=20>
<br><font size=2
color=red><%=formHandler.getErrorMsg("firstName")%></font>
</td>
<td valign=top>
<B>Last Name<sup>*</sup></B>
<br>
<input type="text" name="lastName"
value='<%=formHandler.getLastName()%>' size=15 maxlength=20>
<br><font size=2
color=red><%=formHandler.getErrorMsg("lastName")%></font>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top>
<B>E-Mail<sup>*</sup></B>
<br>
<input type="text" name="email" value='<%=formHandler.getEmail()%>'
size=25 maxlength=125>
<br><font size=2 color=red><%=formHandler.getErrorMsg("email")%></font>
</td>
<td valign=top>
<B>Zip Code<sup>*</sup></B>
<br>
<input type="text" name="zip" value='<%=formHandler.getZip()%>' size=5
maxlength=5>
<br><font size=2 color=red><%=formHandler.getErrorMsg("zip")%></font>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top colspan=2>
<B>User Name<sup>*</sup></B>
<br>
<input type="text" name="userName" size=10
value='<%=formHandler.getUserName()%>' maxlength=10>
<br><font size=2
color=red><%=formHandler.getErrorMsg("userName")%></font>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top>
<B>Password<sup>*</sup></B>
<br>
<input type="password" name="password1" size=10
value='<%=formHandler.getPassword1()%>' maxlength=10>
<br><font size=2
color=red><%=formHandler.getErrorMsg("password1")%></font>
</td>
<td valign=top>
<B>Confirm Password<sup>*</sup></B>
<br>
<input type="password" name="password2" size=10
value='<%=formHandler.getPassword2()%>' maxlength=10>
<br><font size=2
color=red><%=formHandler.getErrorMsg("password2")%></font>
</td>
<br>
</tr>
<tr bgcolor="#c8d8f8">
<td colspan=2 valign=top>
<B>What music are you interested in?</B>
<br>
<input type="checkbox" name="faveMusic" value="Rock"
<%=formHandler.isCbSelected("Rock")%>>Rock
<input type="checkbox" name="faveMusic" value="Pop"
<%=formHandler.isCbSelected("Pop")%>>Pop
<input type="checkbox" name="faveMusic" value="Bluegrass"
<%=formHandler.isCbSelected("Bluegrass")%>>Bluegrass<br>
<input type="checkbox" name="faveMusic" value="Blues"
<%=formHandler.isCbSelected("Blues")%>>Blues
<input type="checkbox" name="faveMusic" value="Jazz"
<%=formHandler.isCbSelected("Jazz")%>>Jazz
<input type="checkbox" name="faveMusic" value="Country"
<%=formHandler.isCbSelected("Country")%>>Country<br>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td colspan=2 valign=top>
<B>Would you like to receive e-mail notifications on our special
sales?</B>
<br>
<input type="radio" name="notify" value="Yes"
<%=formHandler.isRbSelected("Yes")%>>Yes
<input type="radio" name="notify" value="No"
<%=formHandler.isRbSelected("No")%>> No
<br><br></td>
</tr>
<tr bgcolor="#c8d8f8">
<td colspan=2 align=center>
<input type="submit" value="Submit"> <input type="reset"
value="Reset">
</td>
</tr>
</table>
</center>
</form>
</body>
</html>success.jsp
<jsp:useBean id="formHandler" class="foo.FormBean" scope="request"/>
<html>
<body>
<center>
<table cellpadding=4 cellspacing=2 border=0>
<th bgcolor="#CCCCFF" colspan=2>
<font size=5>USER REGISTRATION SUCCESSFUL!</font>
</th>
<font size=4>
<tr bgcolor="#c8d8f8">
<td valign=top>
<b>First Name</b>
<br>
<jsp:getProperty name="formHandler" property="firstName"/>
</td>
<td valign=top>
<b>Last Name</b>
<br>
<jsp:getProperty name="formHandler" property="lastName"/>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top>
<b>E-Mail</b>
<br>
<jsp:getProperty name="formHandler" property="email"/>
<br></td>
<td valign=top>
<b>Zip Code</b>
<br>
<jsp:getProperty name="formHandler" property="zip"/>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td valign=top colspan=2>
<b>User Name</b>
<br>
<jsp:getProperty name="formHandler" property="userName"/>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td colspan=2 valign=top>
<b>What music are you interested in?</b>
<br>
<%
String[] faveMusic = formHandler.getFaveMusic();
if (!faveMusic[0].equals("1")) {
out.println("<ul>");
for (int i=0; i<faveMusic.length; i++)
out.println("<li>"+faveMusic[i]);
out.println("</ul>");
} else out.println("Nothing was selected");
%>
</td>
</tr>
<tr bgcolor="#c8d8f8">
<td colspan=2 valign=top>
<b>Would you like to receive e-mail notifications on our special
sales?</b>
<br>
<jsp:getProperty name="formHandler" property="notify"/>
</td>
</tr>
</font>
</table>
</center>
</body>
</html>DBHandler.java
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import foo.FormBean;
public class DBHandler extends HttpServlet {
public void doPost (HttpServletRequest request, HttpServletResponse response) {
try {
FormBean f = (FormBean) request.getAttribute("formHandler");
boolean userExists = false;
//obtain a db connection and perform a db query
//ensuring that the username does not exist
//set userExists=true if user is found in db
//for a simple test, you can disallow the registration
//of the username "rogerm" as:
//if (f.getUserName().equals("rogerm")) userExists=true;
if (userExists) {
f.setErrors("userName","Duplicate User: Try a different username");
getServletConfig().getServletContext().
getRequestDispatcher("/jsp/forms/retry.jsp").
forward(request, response);
} else {
//retrieve the bean properties and store them
// into the database.
getServletConfig().getServletContext().
getRequestDispatcher("/jsp/forms/success.jsp").
forward(request, response);
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}I get the most errors at the DBHandler code.
First 2 lines saying package does not exist.(I guess thats about right, since I doubt the javax libraries aren't included by default)
Line 3: Unused import
Line 4: Package foo does not exist
Line 5: Cannot find symbol: class HttpServlet
Line 6: Cannot find symbol: class HttpServletRequest, location: class DBHandler
class HttpServletResponse, location: class DBHandler
Line 18: Cannot find symbol: method getServletConfig, location: class DBHandler
Line 24: Cannot find symbol: method getServletConfig, location: class DBHandler
Need some help here lol.
It could be that this doesn't work anymore since this a bit outdated, this was posten in 2000.
Source:
http://www.javaworld.com/javaworld/jw-03-2000/jw-0331-ssj-forms.html?page=1
