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Hi,
I've followed this article (http://java.sun.com/developer/technicalArticles/J2EE/AJAX/[^]) to create a Java Servlet and retrieve data from it using AJAX. In this example the doGet method is automatically run and it gives me the required output, however I would like to have additional methods in this class returning different things that I can call on demand, how would I do this?
Thanks in advance
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Hi, I'm currently working on concerning a student record with guardians/parents... im using the java ee framework.. I'm having problems on retrieving the data on our database(MySQL).. Here is what i did.. i have created a class to retrieve those data from the database..
my problem is that whenever i retrieve that data in my jsp page, it only shows this Ljava.lang.String@123EGa something similar to this..
<small><br />
CLASS PLARENTS .. <br />
<br />
package com;<br />
import java.io.*;<br />
import java.sql.*;<br />
import javax.servlet.jsp.*;<br />
import javax.servlet.jsp.tagext.*;<br />
<br />
public class Parents {<br />
<br />
public String[] lastname;<br />
public String[] firstname;<br />
public String[] middlename;<br />
public String[] relation;<br />
<br />
private Connection connection = null;<br />
private Statement statement = null;<br />
private ResultSet rs = null;<br />
Connect con = new Connect();<br />
int count = 0;<br />
<br />
public Parents(){}<br />
<br />
public Parents(int idno) {<br />
int i = 0;<br />
try {<br />
Class.forName("com.mysql.jdbc.Driver").newInstance();<br />
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sis",con.user,con.password);<br />
statement = connection.createStatement();<br />
rs = statement.executeQuery("SELECT * FROM guardians WHERE studidno='" + idno + "'");<br />
<br />
if (rs.last()) {<br />
count = rs.getRow();<br />
}<br />
<br />
lastname = new String[count];<br />
firstname = new String[count];<br />
middlename = new String[count];<br />
relation = new String[count];<br />
<br />
while (rs.next()){<br />
lastname[i] = rs.getString("lastname");<br />
firstname[i] = rs.getString("firstname");<br />
middlename[i] = rs.getString("middlename");<br />
relation[i] = rs.getString("relation");<br />
i++;<br />
}<br />
<br />
} catch (Exception e) {<br />
e.printStackTrace();<br />
}<br />
}<br />
<br />
<br />
public String[] getLastname(){return lastname;}<br />
<br />
public String[] getFirstname () {return firstname;}<br />
<br />
public String[] getMiddlename () {return middlename;}<br />
<br />
public String[] getRelation () {return relation;}<br />
<br />
}</small>
and this is what i placed in my jsp page..
<small> <% <br />
Parents p = new Parents(info.getIdno());<br />
for (int i = 0; i < p.getFirstname().length; i++ ) {<br />
%><br />
<tr bgcolor="#fefce3"><br />
<td><br />
<p id="info"><br />
<%= p.getLastname() %><br />
</p><br />
<p id="record">Relationship:<br />
<span id="relationship"><br />
<%= p.getFirstname() %><br />
</span><br />
</p><br />
</td><br />
<br />
</tr><br />
<tr><br />
<td> </td><br />
</tr><br />
>% } %></small>
Hi, I'm currently working on concerning a student record with guardians/parents... im using the java ee framework.. I'm having problems on retrieving the data on our database(MySQL).. Here is what i did.. i have created a class to retrieve those data from the database..
my problem is that whenever i retrieve that data in my jsp page, it only shows this Ljava.lang.String@123EGa something similar to this..
"according to what i have read on some searches, the best way to do it is by using data access objects..".. can anybody just an idea on how to do this using data access objects or give some sample codes for me to do this.. Im asking for an idea.. or any sample codes will do.. i have been working on this for about 2 days now, I've done so many researches and i haven't quite find any answer to my problem..
modified on Monday, October 27, 2008 9:23 PM
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Hi,
I am a new member in this forum. I am developing a website.In my website once a user logs in, he is made to view a number of links, the click on which takes them to a new site.
suppose my site is x.com. x.com have a number of url, ome among is a.com. clicking on a.com should allow the user to access search page in a.com site. What i need is when a user clicks on the link a.com from my site x.com, he should be automatically logged into the a.com site. the login info, cookies etc should should be passed programmatically.
Can some one help me to implement this.
Thanks in advance
veda
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Hi,
I have some problem in doing Jtable (I want the JTable to read the data from database) I wrote the code and it work with me in another project but Kow it didn't work I want some one to check this code if I miss some comma or thing in it.
The Code :
//=========================================
package Inventory;
public class cm1 {
private String tables;
public String selectData(String fields, String whereClause) {
if (whereClause == null && fields != null) {
return "SELECT " + fields + " FROM " + this.tables;
} else if (whereClause == null && fields == null) {
return " SELECT * FROM " + this.tables;
} else if (whereClause != null && fields == null) {
return " SELECT * FROM " + this.tables + " WHERE " + whereClause;
} else {
return "SELECT " + fields + " FROM " + this.tables + " WHERE "
+ whereClause;
}
}
//=========================================
public String deleteData(String whereClause) {
return "DELETE " + this.tables + " WHERE " + whereClause;
}
//=========================================
public void setDbTables(String table) {
this.tables = table;
}
//=========================================
public String insertQuery(AddPR p) {
return "INSERT INTO "
+ this.tables
+ " ( ITEMNUM,ITEMTYPE,LOCATION,MANUCODE,FXDASTNUM,MANUSRLNUM,COMMDATE,DESCRIPTION,STATUS,STATUSDATE,MODEL,MSRNUM,COMTYPE,USERNAME,TMSRV,PORT,IPADDRESS,PRICE,PRODUCTIONDATE,YEAR) VALUES ("+ p.getITEMNUM() + ", '" + p.getITEMTYPE() + "', '" + "', '" + p.getLOCATION() + "', '" + "','" + p.getMANUCODE() + "','" + p.getFXDASTNUM() + "', '" + p.getMANUSRLNUM() + "', '" + p.getCOMMDATE() + "', '" + p.getDESCRIPTION() + "', '" + p.getSTATUS() + "', '" + p.getSTATUSDATE() + "','" + p.getMODEL() + "','" + p.getMSRNUM() + "','" + p.getCOMTYPE() + "','" + p.getUSERNAME()+ "','" + p.getTMSRV() + "','" + p.getPORT()+ "','" + p.getIPADDRESS()+ "','" + p.getPRICE()+ "','" + p.getPRODUCTIONDATE() + "', '" +p.getYEAR();
}
}
//========================================="the end of the code"
please help me as soon as possible 
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Hi Xiang,
I found, your program for Searching and replacing strings (TextRep.java) in a file very usefull. Thanks for posting it.
Explaing below a scenario which im working on :
1. My Program should read the file name, search string and string to be replaced from an xml file.
<cmvc>
<cmvcauto>
<filename>C:\cmvc\Readme.txt</filename>
<string>Following are the contents of this CD.</string>
<replace>Im chnaged : Following are the contents of this CD.</replace>;
</cmvcauto>
</cmvc>
2. Get the file, search for the existence of the string in tht file , replace the old one with the new string and save modified file in a diff location.
I thought of modifying your program to match my requirement. Since your program TextRep.java also takes a backup of the file....my issue of saving the modified file is also solved. I have a program to get the values from the xml file. Now im passing those values to ur program instead of args[0], args[1] and args[2].
i get the value of filename from xml file in the fashion :
NodeList textFNList = firstNameElement.getChildNodes();
System.out.println("First file name : " +
((Node)textFNList.item(0)).getNodeValue().trim());
Now i define a method "replaceString" and call it in the main program by passing the values that i get from the xml file :
NodeList textFNList = firstNameElement.getChildNodes();
System.out.println("First file name : " +
((Node)textFNList.item(0)).getNodeValue().trim());
//-------
NodeList lastNameList = firstPersonElement.getElementsByTagName("string");
Element lastNameElement = (Element)lastNameList.item(0);
NodeList textLNList = lastNameElement.getChildNodes();
System.out.println("Search String : " +
((Node)textLNList.item(0)).getNodeValue().trim());
//----
NodeList ageList = firstPersonElement.getElementsByTagName("replace");
Element ageElement = (Element)ageList.item(0);
NodeList textAgeList = ageElement.getChildNodes();
System.out.println("Replace string " +
((Node)textAgeList.item(0)).getNodeValue().trim());
replaceString(((Node)textFNList.item(0)).getNodeValue().trim(), ((Node)textLNList.item(0)).getNodeValue().trim(), ((Node)textAgeList.item(0)).getNodeValue().trim());
Below is the method defenition and the defenition is your program :
public static void replaceString(String fileName, String match, String replacingString)
{
try
{
// make 32k buffer for output
StringBuffer strOutput = new StringBuffer(32768);
// read input file into a byte array
//byte[] pInput = ReadFile(args[0]); This is the original line from your program
byte[] pInput = ReadFile((filename);
// make a backup copy
WriteFile(fileName +".backup.copy",pInput);
String strInput = new String(pInput);
Doing this modification, i get the below error :
C:\Documents and Settings\Administrator\Desktop\CMVC_Automation>javac fullSearch.java
fullSearch.java:107: cannot find symbol
symbol : method ReadFile(java.lang.String)
location: class fullSearch
byte[] pInput = ReadFile(fileName);
^
fullSearch.java:109: cannot find symbol
symbol : method WriteFile(java.lang.String,byte[])
location: class fullSearch
WriteFile(fileName +".backup.copy",pInput);
^
2 errors
My program starts with these lines :
import org.w3c.dom.Document;
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.io.*;
import java.util.*;
Would really apreciate, if you could help on those errors. Thanks.
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Hi, I successfully send email with the following code in English. However, if the message and the subject title are in other characters, everything becomes question marks and the subject title says something like ...ANSI...3F=3F=3F...
How do I set the character encoding to utf-8, for example? Thanks.
<br />
try<br />
{ <br />
Properties props = new Properties(); <br />
Session sendMailSession; <br />
Transport transport; <br />
sendMailSession = Session.getInstance(props, null); <br />
props.put("mail.smtp.host", SMTP_CLIENT); <br />
Message newMessage = new MimeMessage(sendMailSession); <br />
newMessage.setFrom(new InternetAddress(EMAIL_FROM)); <br />
newMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(strEmail)); <br />
newMessage.setSubject(SUBJECT); <br />
newMessage.setSentDate(new Date()); <br />
strMsg = "Dear " + RS.getString("FIRST") + " " + RS.getString("LAST") + ",";<br />
strMsg += "\n\n";<br />
strMsg += [MESSAGE IN CHARACTERS OTHER THAN ASCII];<br />
newMessage.setText(strMsg); <br />
transport = sendMailSession.getTransport("smtp");<br />
transport.send(newMessage);<br />
} <br />
catch(MessagingException m) <br />
{ <br />
...<br />
}
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Can anyone tell me different between JRE 1.6 and JRE 1.5? And what is "Keep temporary files on my computer" option? When I un-check this option, my applet runs ok. But If I check this option, my applet sometimes hangs up. So, I guess this error is come by "Keep temporary files on my computer" option. JRE 1.5 doens't have this option.
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don't sun provide a Release Note Document ?
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It can't help me in this error!
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utnqbao wrote: It can't help me in this error!
which error ?
If sun can't help you with Java, I really wonder who can... 
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They don't tell this error. So, I can't find the solution of this error. Thanks for your reply!
I've another question. Do know you how to uncheck "Keep temporary files on my computer" by code or script?
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utnqbao wrote: They don't tell this error. So, I can't find the solution of this error
but WHICH error ??!!
you're talking about an error, but I still don't know which.
do you have a message you could post here ?
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Can anyone tell me different between JRE 1.6 and JRE 1.5? And what is "Keep temporary files on my computer" option? When I un-check this option (JRE 1.6.0_03), my applet runs ok. But If I check this option and clear caching, my applet sometimes hangs up at the first time. I get error below:
java.io.FileNotFoundException: http://loadbal1.amr.smtf.ds/netgcontent/NG/Content/NLS_Content/en_US_44003/en_US_44003_Sim2.nll
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.URL.openStream(Unknown Source)
at netg.util.nls_v.c(Unknown Source)
at netg.util.nls_u.a(Unknown Source)
at netg.InterNETgBase.c(Unknown Source)
at netg.InterNETgBase.a(Unknown Source)
at netg.nls_g5.actionPerformed(Unknown Source)
at netg.event.nls_bv.actionPerformed(Unknown Source)
at netg.display.nls_ay.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ay.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ay.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ay.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ay.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ay.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_bt.a(Unknown Source)
at netg.display.nls_bt.a(Unknown Source)
at netg.display.nls_ay.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_ck.a(Unknown Source)
at netg.display.nls_bd.a(Unknown Source)
at netg.display.nls_nr.run(Unknown Source)
at netg.util.nls_n.run(Unknown Source)
.............
From the second time, my applet is ok.
So, I guess this error is come by "Keep temporary files on my computer" option. JRE 1.5 doens't have this option. My applet can run ok with JRE 1.5.
Can you please tell me difference between check and un-check "Keep temporary files on my computer" option? Do we have anyway to uncheck it by Javascript or code? I don't know why un-check "Keep temporary files on my computer" option is ok with my Applet.
Thanks!
modified on Thursday, October 23, 2008 11:02 PM
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We have developed a web-based application with JSP as front-end. Recently we observed that after taking one of the Windows Updates, few buttons in our application are not working. If I uninstall this particular update, buttons are working fine. When I say it is not working, it means that onclick action is not taking place.
Windows Update: KB956390
Also, our buttons are developed in VML.
I've given below some code snippets:
JSP
===
<html xmlns:zoniac="ZON">
.............
.............
.............
<zoniac:roundrect class="zoniac_roundButton" arcsize="0.9" fillcolor="#245f91" style='width:95px;cursor:hand' href="javascript:btnLinkClick('accountsNewCompany',document.accfrm)" strokecolor="#245f91" onselectstart="return false">New Account</zoniac:roundrect>
.............
.............
.............
</html>
Also, If I change the above "href" action into "onClick" event, it's working fine. But I want the action to be with href, since I cannot make this kind of change all over my application.
<zoniac:roundrect class="zoniac_roundButton" arcsize="0.9" fillcolor="#245f91" style='width:95px;cursor:hand' onClick="javascript:btnLinkClick('accountsNewCompany',document.accfrm)" strokecolor="#245f91" onselectstart="return false">New Account</zoniac:roundrect>
CSS
===
zoniac\:*
{ behavior: url(#default#VML)
}
.zoniac_roundButton
{ text-align:center;
padding-top:3px;
color:white;
font:bold 11px tahoma;
height:17px;
}
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Anyone know where I can download this? I look on java.sun.com, but I didn't see it.
Everything makes sense in someone's mind
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import javax.swing.JOptionPane;
public class MultiplicationTable {
public static void main(String[] args) {
String output = "Kilograms pounds";
output += "\n";
for (int j = 1 ; j <= 9; j+=2)
output += " " + j + "\n";
output += "\n";
for (double i = 2.2 ; i <=6.6 ; i+=4.4)
output += " " + i + "\n";
JOptionPane.showMessageDialog(null, output);
}
}
here is a clearer representation of my question.
im trying to get my second output column under pounds.
does anyone know how this would be done?
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The code is right..
It prints ur second o/p under pounds only...
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Hello,
I am kinda new to java.I was trying to create two text field in the code below with display and display1.But it wont show me two text field on GUI.
I could use some help from u guys.
Thanks and i appreciate it.
public class UserInterface
implements ActionListener
{
private CalcEngine calc;
private boolean showingAuthor;
private JFrame frame;
private JTextField display;
private JTextField display1;
private JLabel status;
/**
* Create a user interface for a given calcEngine.
*/
public UserInterface(CalcEngine engine)
{
calc = engine;
showingAuthor = true;
makeFrame();
frame.setVisible(true);
}
/**
* Make this interface visible again. (Has no effect if it is already
* visible.)
*/
public void setVisible(boolean visible)
{
frame.setVisible(visible);
}
/**
* Make the frame for the user interface.
*/
private void makeFrame()
{
frame = new JFrame(calc.getTitle());
JPanel contentPane = (JPanel)frame.getContentPane();
contentPane.setLayout(new BorderLayout(8, 8));
contentPane.setBorder(new EmptyBorder( 10, 10, 10, 10));
display = new JTextField();
display1 = new JTextField();
contentPane.add(display, BorderLayout.NORTH);
contentPane.add(display1, BorderLayout.EAST);
JPanel buttonPanel = new JPanel(new GridLayout(4, 4));
addButton(buttonPanel, "7");
addButton(buttonPanel, "8");
addButton(buttonPanel, "9");
addButton(buttonPanel, "C");
addButton(buttonPanel, "4");
addButton(buttonPanel, "5");
addButton(buttonPanel, "6");
addButton(buttonPanel, "?");
addButton(buttonPanel, "1");
addButton(buttonPanel, "2");
addButton(buttonPanel, "3");
buttonPanel.add(new JLabel(" "));
addButton(buttonPanel, "0");
addButton(buttonPanel, "+");
addButton(buttonPanel, "-");
addButton(buttonPanel, "=");
contentPane.add(buttonPanel, BorderLayout.CENTER);
status = new JLabel(calc.getAuthor());
contentPane.add(status, BorderLayout.SOUTH);
frame.pack();
}
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Hi, my jsp page uses sun.net.smtp.SmtpClient to send email. It worked fine until the hosted location was moved to another server. Now it generates the sun.net.smtp.SmtpProtocolException and the hosting company can't find what's wrong with it so I'm here hoping somebody can help.
What could cause the SmtpProtocolException? "locahost" was what I used to connect to the smtp server. When it failed, I tried another smtp server like "mail.xxx.com" on another server and it worked but the problem is that this server can't let me send mail to other domains except its own domain.
Thanks
The following is the code responsible for the email:
-------------------------------------------------------------
try
{
client = new SmtpClient(localhost);
client.from(EMAIL_FROM);
client.to(strEmail);
PrintStream message = client.startMessage();
message.println("From: " + EMAIL_FROM);
message.println("To: " + strEmail);
message.println("Subject: " + SUBJECT);
message.println();
...
client.closeServer();
}
catch(IOException e)
{
<div><%=e%></div>
}
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When I compile this, I get an error:
import java.lang.*;
import java.util.Scanner;
public class Test
{
public static void main(String[] args)
{
Scanner console = new Scanner(System.in);
}
}
The error is "Cannot resolve symbol class Scanner".
Anyone know what's wrong here?
Everything makes sense in someone's mind
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don't know how you're compiling your code, but I have absolutely no error with the following code :
package test;
import java.util.Scanner;
public class Test {
public static void main(String[] args) {
Scanner s = new Scanner(System.in);
}
}
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Hi,
First time programming JSP as I have to do it for an uni assignment. Basically I have created a register HTML and JSP page:
<br />
<!-- Register.html --><br />
<html><br />
<head><br />
<title>Register Form</title><br />
</head><br />
<br />
<body><br />
<h1>Hotel Account</h1><br />
<form><br />
<br />
<br />
ACTION="Register" METHOD="POST"><br />
<br />
<pre><br />
Customer Name: <input type="text" name="CustomerName"><br />
Customer No: <input type="text" name="CustomerNo"><br />
Customer Type: <input type="text" name="CustomerType"><br />
Customer Comp: <input type="text" name="CustomerComp"><br />
Customer Address: <input type="text" name="CustomerAddress"><br />
Nationality: <input type="text" name="Nationality"><br />
Passport No: <input type="text" name="PassportNo"><br />
Travel Agency: <input type="text" name="TravelAgency"><br />
Password: <input type="text" name="Password"><br />
</input></input></input></input></input></input></input></input></input></pre><br />
<br />
<input type="SUBMIT" value="Submit"><br />
</input></form><br />
</body><br />
</html><br />
From there what I am trying to do is insert all the data gathered from the inputs into an DB.
Now I have decided to do 4 Java classes and 1 servlet inorder to achieve this.
I have created the account class to use the getter and setter methods:
<br />
<br />
<br />
<br />
public abstract class Account<br />
{<br />
String CustomerName, CustomerType, CustomerComp, CustomerAddress, Nationality, PassportNo, TravelAgency, Password;<br />
int CustomerNo;<br />
<br />
<br />
<br />
public Account()<br />
{<br />
CustomerName = "";<br />
CustomerNo = 0;<br />
CustomerType = "";<br />
CustomerComp = "";<br />
CustomerAddress = "";<br />
Nationality = "";<br />
PassportNo = "";<br />
TravelAgency = "";<br />
Password = "";<br />
<br />
}<br />
<br />
<br />
public Account(String cName, int cNo, String cType, String cComp, String cAdd, String n, String pNo, String tAgency, String pass)<br />
<br />
{<br />
CustomerName = cName;<br />
CustomerNo = cNo;<br />
CustomerType = cType;<br />
CustomerComp = cComp;<br />
CustomerAddress = cAdd;<br />
Nationality = n;<br />
PassportNo = pNo;<br />
TravelAgency = tAgency;<br />
Password = pass;<br />
}<br />
<br />
public void setCustomerName(String cName)<br />
{<br />
CustomerName = cName;<br />
}<br />
<br />
public void setCustomerNo(int cNo)<br />
{<br />
CustomerNo = cNo;<br />
}<br />
<br />
public void setCustomerType(String cType)<br />
{<br />
CustomerType = cType;<br />
}<br />
<br />
public void setCustomerComp(String cComp)<br />
{<br />
CustomerComp = cComp;<br />
}<br />
<br />
public void setCustomerAddress(String cAdd)<br />
{<br />
CustomerAddress = cAdd;<br />
}<br />
<br />
public void setNationality(String n)<br />
{<br />
Nationality = n;<br />
}<br />
<br />
public void setPassportNo(String pNo)<br />
{<br />
PassportNo = pNo;<br />
}<br />
<br />
public void setTravelAgency(String tAgency)<br />
{<br />
TravelAgency = tAgency;<br />
}<br />
<br />
public void setPassword(String pass)<br />
{<br />
Password = pass;<br />
}<br />
<br />
public void setAllAccountData(String cName, int cNo, String cType, String cComp, String cAdd, String n, String pNo, String tAgency, String pass)<br />
{<br />
CustomerName = cName;<br />
CustomerNo = cNo;<br />
CustomerType = cType;<br />
CustomerComp = cComp;<br />
CustomerAddress = cAdd;<br />
Nationality = n;<br />
PassportNo = pNo;<br />
TravelAgency = tAgency;<br />
Password = pass;<br />
}<br />
<br />
public String getCustomerName()<br />
{<br />
return CustomerName;<br />
}<br />
<br />
public int getCustomerNo()<br />
{<br />
return CustomerNo;<br />
}<br />
<br />
public String getCustomerType()<br />
{<br />
return CustomerType;<br />
}<br />
<br />
public String getCustomerComp()<br />
{<br />
return CustomerComp;<br />
}<br />
<br />
public String getCustomerAddress()<br />
{<br />
return CustomerAddress;<br />
}<br />
<br />
public String getNationality()<br />
{<br />
return Nationality;<br />
}<br />
<br />
public String getPassportNo()<br />
{<br />
return PassportNo;<br />
}<br />
<br />
public String getTravelAgency()<br />
{<br />
return TravelAgency;<br />
}<br />
<br />
public String getPassword()<br />
{<br />
return Password;<br />
}<br />
<br />
<br />
public String getAllAccountData()<br />
{<br />
return "CustomerName = " + CustomerName +<br />
"; CustomerNo = " + CustomerNo +<br />
"; CustomerType = " + CustomerType +<br />
"; CustomerComp = " + CustomerComp +<br />
"; CustomerAddress = " + CustomerAddress +<br />
"; Nationality = " + Nationality +<br />
"; PassportNo = " + PassportNo +<br />
"; TravelAgency = " + TravelAgency +<br />
"; Password = " + Password;<br />
}<br />
Then I made an Account DB class to hold customer info:
<br />
<br />
<br />
<br />
import java.sql.*;<br />
<br />
<br />
<br />
<br />
public class AccountDB<br />
{<br />
<br />
static Connection connection;<br />
static final String dbDriver =<br />
"sun.jdbc.odbc.JdbcOdbcDriver";<br />
static final String dbUrl = "jdbc:odbc:HotelDatabase1";<br />
static final String dbName = "HotelDatabase1";<br />
static final String dbUser = " ";<br />
static final String dbPassword = " ";<br />
<br />
<br />
public Connection getConnection()<br />
{<br />
System.out.println("Getting Database driver" );<br />
try<br />
{<br />
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver" );<br />
<br />
}<br />
catch( ClassNotFoundException e )<br />
{<br />
System.err.println(<br />
"Cannot load database driver: for DB2, "<br />
+ "your classpath must include "<br />
+ "SQLLIB\\JAVA12\\DB2JAVA.ZIP." );<br />
}<br />
<br />
<br />
<br />
if ( connection != null )<br />
return connection;<br />
try {<br />
connection = DriverManager.getConnection(<br />
dbUrl, dbUser, dbPassword);<br />
} catch( SQLException e ) {<br />
System.err.println(<br />
"Cannot connect to database: "<br />
+ "check that Access is running and "<br />
+ "the Hotel Database database exists." );<br />
}<br />
return connection;<br />
}<br />
public ResultSet getAllCustomerInfo() {<br />
ResultSet rs = null;<br />
try {<br />
Statement statement =<br />
getConnection().createStatement();<br />
String sql =<br />
"SELECT * FROM Customer";<br />
System.out.println( sql );<br />
statement.executeQuery( sql );<br />
rs = statement.getResultSet();<br />
} catch( SQLException e ) {<br />
System.out.println(<br />
"SQLException " + e.getMessage() );<br />
} finally {<br />
return rs;<br />
}<br />
}<br />
public void addCust( CustomerAccount account )<br />
throws SQLException, DBopException<br />
{<br />
int nrows = 0;<br />
Statement statement = getConnection().createStatement();<br />
String sqlString ="INSERT INTO Customer VALUES ("<br />
+ account.getCustomerName()<br />
+ ",'"<br />
+ account.getCustomerNo()<br />
+ "','"<br />
+ account.getCustomerType()<br />
+ "',"<br />
+ account.getCustomerComp()<br />
+ ",'"<br />
+ account.getCustomerAddress()<br />
+ "','"<br />
+ account.getNationality()<br />
+ "','"<br />
+ account.getPassportNo()<br />
+ "','"<br />
+ account.getPassword()<br />
+ ")";<br />
<br />
<br />
nrows = statement.executeUpdate( sqlString );<br />
if ( nrows != 1 )<br />
{<br />
throw new DBopException(<br />
"Instead of 1 row, "<br />
+ nrows<br />
+ " were inserted." );<br />
}<br />
return;<br />
}<br />
public void updateCust( CustomerAccount account )<br />
throws SQLException, DBopException<br />
{<br />
int nrows = 0;<br />
Statement statement =<br />
getConnection().createStatement();<br />
String sql =<br />
"UPDATE Customer SET "<br />
+ "CustomerName = "<br />
+ account.getCustomerName()<br />
+ ", "<br />
+ "CustomerType = '"<br />
+ account.getCustomerType()<br />
+ "', "<br />
+ "CustomerComp = "<br />
+ account.getCustomerComp()<br />
+ ", "<br />
+ "CustomerAddress = '"<br />
+ account.getCustomerAddress()<br />
+ "', "<br />
+ "Nationality = '"<br />
+ account.getNationality()<br />
+ "', "<br />
+ "PassportNo = '"<br />
+ account.getPassportNo()<br />
+ "', "<br />
+ "Password = '"<br />
+ account.getPassword()<br />
+ " WHERE CustomerNo="+account.getCustomerNo();<br />
<br />
<br />
System.out.println( sql );<br />
nrows = statement.executeUpdate( sql );<br />
if ( nrows != 1 )<br />
{<br />
throw new DBopException(<br />
"Instead of 1 row, "<br />
+ nrows<br />
+ " were updated." );<br />
}<br />
return;<br />
}<br />
}<br />
<br />
A customer account java class for the customer account itself:
<br />
<br />
<br />
<br />
public class CustomerAccount extends Account<br />
{<br />
public CustomerAccount(String cName, int cNo, String cType, String cComp, String cAdd, String n, String pNo, String tAgency, String pass)<br />
{<br />
super(cName, cNo, cType, cComp, cAdd, n, pNo, tAgency, pass);<br />
<br />
}<br />
<br />
<br />
}<br />
<br />
<br />
A DBopexception java class for the exception:<br />
<br />
<br />
<br />
<br />
<br />
public class DBopException extends Exception {<br />
<br />
public DBopException() {<br />
this("Could not complete AccountDB database operation");<br />
}<br />
<br />
public DBopException(String s) {<br />
super(s);<br />
}<br />
}<br />
And finally a register servlet:
<br />
<br />
import java.io.*;<br />
import java.text.*;<br />
import java.sql.*;<br />
import javax.servlet.*;<br />
import javax.servlet.http.*;<br />
import javax.servlet.jsp.*;<br />
<br />
<br />
<br />
public class Register extends HttpServlet<br />
{<br />
private AccountDB accountDB;<br />
private Connection connection;<br />
private Statement statement;<br />
private CustomerAccount customerAccount;<br />
private String query;<br />
<br />
public void init( ServletConfig config ) throws ServletException<br />
{<br />
<br />
accountDB = new AccountDB();<br />
accountDB.getConnection();<br />
}
<br />
protected void doPost( HttpServletRequest request,<br />
HttpServletResponse response )<br />
throws ServletException, IOException<br />
{<br />
response.setContentType( "text/html" );<br />
PrintWriter out = response.getWriter();<br />
<br />
<br />
out.println( "" );<br />
<br />
out.println( " "XHTML 1.0 Strict
"/TR/xhtml1/DTD/xhtml1-strict.dtd\">" );<br />
<br />
out.println(<br />
"<html xmlns="\"http://www.w3.org/1999/xhtml\"">" );<br />
<br />
<br />
<br />
// head section of document<br />
out.println( "<head>" );<br />
<br />
// read response by customer<br />
String CustomerName, CustomerType, CustomerComp, CustomerAddress, Nationality, PassportNo, TravelAgency, Password;<br />
<br />
<br />
CustomerName = request.getParameter( "CustomerName" );<br />
int CustomerNo = Integer.parseInt(request.getParameter("CustomerNo"));<br />
CustomerType = request.getParameter("CustomerType");<br />
CustomerComp = request.getParameter("CustomerComp");<br />
CustomerAddress = request.getParameter ("CustomerAddress");<br />
Nationality = request.getParameter ("Nationality");<br />
TravelAgency = request.getParameter ("TravelAgency");<br />
PassportNo = request.getParameter("PassportNo");<br />
Password = request.getParameter("Password");<br />
<br />
<br />
// attempt to process the account information<br />
try<br />
{<br />
if (CustomerName.equals( "" ) ||<br />
CustomerType.equals( "" ) ||<br />
Password.equals("")) <br />
{<br />
out.println( "<h3> Please click the back " +<br />
"button and fill in all " +<br />
"fields.</h3>" );<br />
out.close();<br />
return;<br />
} <br />
else<br />
{<br />
customerAccount = new CustomerAccount(CustomerName,<br />
CustomerNo,<br />
CustomerType,<br />
CustomerComp,<br />
CustomerAddress,<br />
Nationality,<br />
PassportNo,<br />
TravelAgency,<br />
Password);<br />
accountDB.addCust(customerAccount);<br />
}<br />
out.println( "<title>Thank you!</title>" );<br />
out.println( "</head>" );<br />
<br />
out.println( "<body>" );<br />
out.println( "<p>Thank you account created." );<br />
<br />
// end XHTML document<br />
out.println( "</p></body></html>" );<br />
out.close();<br />
<br />
}<br />
<br />
// if database exception occurs, return error page<br />
catch ( SQLException sqlException )<br />
{<br />
sqlException.printStackTrace();<br />
out.println( "<title>Error</title>" );<br />
out.println( "" );<br />
out.println( "<body><p>SQLException: Database error occurred. " );<br />
out.println( "Try again later.</p></body>" );<br />
out.close();<br />
} <br />
catch(DBopException dbException)<br />
{<br />
dbException.printStackTrace();<br />
out.println( "<title>Error</title>" );<br />
out.println( "" );<br />
out.println( "<body><p>DBopException: Database error occurred. " );<br />
out.println( "Try again later.</p></body>" );<br />
out.close();<br />
}<br />
<br />
} // end of doPost method<br />
<br />
// close SQL statements and database when servlet terminates<br />
public void destroy()<br />
{<br />
// attempt to close statements and database connection<br />
try {<br />
statement.close();<br />
connection.close();<br />
}<br />
<br />
// handle database exceptions by returning error to client<br />
catch( SQLException sqlException ) {<br />
sqlException.printStackTrace();<br />
}<br />
}<br />
<br />
} // end class RegisterServlet<br />
Now the problem is when the project runs and I have inserted all the data once I submit it says SQLException..I have tried other ways but cant find a solution for it..could it be that I have too many classes? IS there a better way to achieve what I want?
Any help would be appreciated.
PS. Ignore the comments in the code as they indicate the wrong things.
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 This Post is Way TOO HUGE !!!
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hi, every one....
I done project on core java..for load balancing in a distributed system............
our main goal of the project is to "avoid the network crash".......balancing a load..........
problem statement:"whenever an end point systems are heavily loaded..network may crash..and it wil cause..irreversible damage to the network"
soln..we find out are:..find out the which client..is heavily loaded and which client is having fewer load...the..client..which is havily loaded...that client..process is transfarring..to the client..which is..having..lower load"..........
but..right now i'm facing ..problem is that:...how to transferring a process from one client to another client..if the process trasferred from one process name called:"internetexplorer"...same..process should transffer to the another client...and process should..in same..status...that is:..if any thing downloading from internet..that time..client becomes,..heavily..loded..then the same process can be transffered to the client which is having lower load..again...proces..of "inetrnetexplorer"...remains..same..of..coninuing..downloading..processs"...................please...if any one....know about..the java code..for..this..please...help me!!!!
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