Java

42774808-Sep-09 13:03

8-Sep-09 13:03

Sending an Email in Java (Servlet)

Prerequisites:
1. Java Mail API (mail.jar)
2. activation.jar
3. HTML Form (Optional)
4. Servlet or JSP (to send the email)

Steps:
1. Download and install JDK6U16
2. Download Apache Tomcat
3. Download Eclipse
4. In Eclipse, make sure to add the apache server first
5. Create a dynamic web project
6. Under the WEB-INF create a folder called lib and paste mail.jar and activation.jar
7. Create a jsp and call it index.jsp
8. Create a servlet and call it sendMail
9. Create a class called MyPasswordAuthenticator (will act as authentication or you can use the code inside the sendMail as you like)
10. Create two jsps (success and error)
11. Create a css file called style

index.jsp Code:

<html>
<head>
<title>Sending email</title>
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body>
<center>
<form action="sendMail" method="get">   
<table>
<tr>
<td>From</td>
<td><input type="text" name="from"></td>
</tr>
<tr>
<tr>
<td>To</td>
<td><input type="text" name="to"></td>
</tr>
<tr>
<td>Subject</td>
<td><input type="text" name="subject"></td>
</tr>    
<tr>
<td>Message</td>
<td><textarea cols="25" rows="8" name="message"></textarea></td>
</tr>
</table>
<br>
<input type="submit" value="submit">
</form>
</center>
</body>
</html>

style.css

* { font-size: 12px; font-family: Verdana }
input, textarea { border: 1px solid #ccc }
textarea { text-align:left}
table { margin-top: 10% }
.error { margin-top: 10%; border: 1px dotted #db1f1f; width: 250px }
.msg { margin-top: 10%; border: 1px dotted #ccc; width: 250px }

sendMail Servlet

import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class sendMail extends HttpServlet 
{
	public void doGet(HttpServletRequest req, HttpServletResponse resp) 
	{
		String username = "your gmail account";
		String password = "your gmail password";
		Properties props = new Properties();
		props.put("mail.smtp.host", "smtp.gmail.com");
		props.put("mail.smtp.starttls.enable", "true");

		Session session = null;
		if (username != null && password != null) 
		{
			props.put("mail.smtp.auth", "true");
			session = Session.getInstance(props, new MyPasswordAuthenticator(username, password));
		} 
		else 
		{
			session = Session.getDefaultInstance(props, null);
		}

		MimeMessage message = new MimeMessage(session);
		try 
		{
			message.setFrom(new InternetAddress(req.getParameter("from")));
			InternetAddress[] address = InternetAddress.parse(req.getParameter("to"), false);
			message.setRecipients(Message.RecipientType.TO, address);
			message.setSubject(req.getParameter("subject"));
			message.setText(req.getParameter("message"));
			Transport.send(message);
			RequestDispatcher d = req.getRequestDispatcher("success.jsp");
			d.forward(req, resp);
		} 
		catch (Exception e) 
		{
			try 
			{
				RequestDispatcher d = req.getRequestDispatcher("error.jsp");
				d.forward(req, resp);
			} 
			catch (Exception e2) {}
		}
	}
}

MyPasswordAuthenticator

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

class MyPasswordAuthenticator extends Authenticator
{
	String user;
	String pw;
	public MyPasswordAuthenticator (String username, String password)
	{
		super();
		this.user = username;
		this.pw = password;
	}
	public PasswordAuthentication getPasswordAuthentication()
	{
		return new PasswordAuthentication(user, pw);
	}
}

success.jsp

<html>
  <head>
    <title>Message</title>
  </head>
  <body>
    <center>
      <div class="msg">
        <h2>Message</h2>
          <p>
               Email sent
          </p>
      </div>
   </center>
  </body>
</html>

error.jsp

<html>
  <head>
    <title>Error</title>
      <link rel="stylesheet" href="style.css" type="text/css">
    </head>
    <body>
      <center>
        <div class="error">
          <h2>Error</h2>
            <p>
               Message: <%= request.getAttribute("ErrorMessage") %>    
            </p>
        </div>
      </center>
    </body>
</html>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>SendingEmail</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>sendMail</display-name>
    <servlet-name>sendMail</servlet-name>
    <servlet-class>sendMail</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>sendMail</servlet-name>
    <url-pattern>/sendMail</url-pattern>
  </servlet-mapping>
</web-app>

Make sure to put your gmail username and password in sendMail servlet
Next run index.jsp

Good luck

modified on Tuesday, September 8, 2009 7:35 PM

sangeeta200910-Sep-09 22:51

sangeeta2009

10-Sep-09 22:51

Thanks Member 4277480 for ur reply

SIR i deployed your coding in NET-BEANS.
The files like
index.jsp
error.jsp
success.jsp
style.css
MyPasswordAuthenticator.java
sendMail.java

was easily uploded into it but
in case of mail.jar & activation.jar
i downloaded the javamail-1.4.2 and jaf-1_1_1
rar files from sun.com and then there is a confusion on by which
name they are to be import to source library..
i gave the names javamail-1.4.2 and jaf-1_1_1 and give path to jar files....

i also provided the gmail account and password , but i am not able to send the mail.
would you please tell whether you were succeeded in doing it and help me out sir, it is very important for me.
please provide a bit more details
I need your helping hand
please help....

what i think that i haven't configured any smtp server.
Could you please tell what should i do for it...
i think i am missing this thing only
reply soon

modified on Friday, September 11, 2009 5:17 AM

427748011-Sep-09 13:27

11-Sep-09 13:27

http://www.mediafire.com/download.php?yygnyhmd1dg
1. Download rar from above.
2. Open it using Eclipse (JDK6U16)
3. When you provide your account make sure its in the format email@gmail.com

All done.

To setup a personal smtp read this guide:
http://www.ehow.com/how_4489548_set-up-smtp-server-windows.html

Good Luck

sangeeta200917-Sep-09 6:21

sangeeta2009

17-Sep-09 6:21

hello sir

the link you provide
http://www.mediafire.com/download.php?yygnyhmd1dg

is not working, the rar file is not available..
please look at it
also tell me that, the code you provided me is just sufficient to send message
or i need to configure a smtp server also..
because i am just running your code

please reply soon...

427748018-Sep-09 15:25

18-Sep-09 15:25

http://rapidshare.com/files/282003437/SendingEmail.rar.html[^]

Yes it is sufficient, after extracting the rar open it using Eclipse (with apache) then modify

String username = "your gmail account"; // in the form myemail@gmail.com
String password = "your gmail password";

then launch index.jsp and your done.

Good luck

sangeeta200923-Sep-09 5:16

sangeeta2009

23-Sep-09 5:16

well Member 4277480
i am trying your code but it still not sending them.
Tell me whether i have to configure some smtp settings
to the gmail account which i am using here.
also if possible please send some important screenshot
like when configuring tomcat server.
also tell me what is this program actually doing, is this sending the mails to any client by using my email address in FROM: option.
do i need to configure any port

Please help me this last time...
I am very close to successfully running it..
Please reply with screenshots

427748023-Sep-09 18:25

how to convert swings to java applet

23-Sep-09 18:25

I attached the files again with screenshots:
http://rapidshare.com/files/284210076/Email.rar.html[^]

But honestly if you have done some web programming this should not take this long to configure. Anyways its always good to help others.

Good luck

Member 46403268-Sep-09 3:32

Member 4640326

8-Sep-09 3:32

hi

how to convert java swings application to java applet

please guide me

import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.text.DateFormatSymbols;
import java.util.Calendar;
import java.util.Locale;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;

import com.standbysoft.datepicker.JDatePicker;

public class GeneralDemo extends JPanel {

private JDatePicker datePicker;

public GeneralDemo() {

datePicker = new JDatePicker();

setLayout(new GridBagLayout());

add(datePicker, new GridBagConstraints(0, 7, 1, 1, 0.0, 0.0, GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, new Insets(0, 5, 5, 5), 0, 0));

}

private static void createAndShowGUI() {

JFrame frame = new JFrame("GeneralDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

GeneralDemo newContentPane = new GeneralDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);

//Display the window.
frame.pack();
frame.setVisible(true);
}

public static void main(String[] args) {

javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}

have a nice day

bye
naga

Re: how to convert swings to java applet

Nagy Vilmos8-Sep-09 10:36

Nagy Vilmos

8-Sep-09 10:36

0. Wrap you code in <PRE> tags, it'll keep it flame-retardent.
1. What have you tried? You have to make an effort for anyone here to help, just asking for code won't be of any use.

Panic, Chaos, Destruction.
My work here is done.

Re: how to convert swings to java applet

42774808-Sep-09 13:06

deployment eerrotr 404 error

8-Sep-09 13:06

Applet Code

import java.applet.*;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import com.standbysoft.component.date.swing.JDatePicker;

public class GeneralDemo_2 extends Applet
{
	private JDatePicker datePicker;
	public void init() 
	{
		datePicker = new JDatePicker();
		setLayout(new GridBagLayout());
		add(datePicker, new GridBagConstraints(0, 7, 1, 1, 0.0, 0.0, GridBagConstraints.NORTH, GridBagConstraints.HORIZONTAL, new Insets(0, 5, 5, 5), 0, 0));
	}
}

HTML Code

<object
    code="GeneralDemo_2.class"
    type="application/x-java-applet"
    archive="jdatepicker.jar"
    height="300" width="450" 
>
</object>

Make sure you have the jdatepicker.jar in the same location as your .class and html

Good Luck

kirancgi7-Sep-09 21:48

kirancgi

7-Sep-09 21:48

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.http.HttpServlet;
import java.io.*;
public class DateExample extends HttpServlet{
public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException {
res.setContentType("text/html");
PrintWriter pw=res.getWriter();
pw.println("<html><head><title>wELCOME TO sERVLET pROGRAMING</title></head>");
pw.println("<body>");
pw.println("Print date and time");
java.util.Date dat=new java.util.Date();
pw.println(dat);
pw.println("</body></html>");
System.out.println("Thnx 4 using this application");

}

}

<servlet>
<servlet-name>hai
<servlet-class>DateExample<

<servlet-mapping>
<servlet-name>hai
<url-pattern>/ServletSample

at the time of deployment iam getting error like this, tell me how to resolve this one.

The requested resource (/ServletSamples/DateExample) is not available.

Re: deployment eerrotr 404 error

thomas.michaud8-Sep-09 3:40

thomas.michaud

8-Sep-09 3:40

A 404 error indicates a WEB/HTML issue rather than a programming bug.

Take a look at your web servers logs. 404 indicates it couldn't find the resource (URI). Is your web.xml properly configured for the servlet?

Re: deployment eerrotr 404 error

42774808-Sep-09 13:11

8-Sep-09 13:11

Make sure this is in your web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Test_1.1</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>DateExample</display-name>
    <servlet-name>DateExample</servlet-name>
    <servlet-class>DateExample</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>DateExample</servlet-name>
    <url-pattern>/DateExample</url-pattern>
  </servlet-mapping>
</web-app>

Your code works fine
Good luck

Key Logger

badrisuper6-Sep-09 21:55

badrisuper

6-Sep-09 21:55

Hi All,
I am very new to this forum. And I have very little knowledge in java. I want to create one key logger application. Please suggest me which language is best whether java or c++. And I dont where to start and how to start. Please people you have any ideas share with me.

Re: Key Logger

TorstenH.7-Sep-09 1:35

TorstenH.

7-Sep-09 1:35

Refering to sun.com[^] JAVA is running 4.5 billion PC's worldwide - why use anything else for a keylogger-virus?? Laugh | :laugh:

You should start with a concept. A concept does make it easier. I'm pretty sure about that!

greets
Torsten

___________________________________________________________________
I never finish anyth...

Re: Key Logger

EliottA7-Sep-09 4:44

EliottA

7-Sep-09 4:44

It's really like comparing apples and oranges but anyone will tell you to do it in C++. The advantages of C++ outweigh Java any day of the week; java is intepreted and slow. C++ is native and fast.

Yeah, the only reason I'm helping you us because of the sheer stupidity of your question, in fact it is indeed so stupid, I have absolutely no confidence in your ability to learn java, nevertheless C++.

Good luck at failing.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Re: Key Logger

42774807-Sep-09 8:01

7-Sep-09 8:01

It is possible to do it in both but it all comes down to your preference.

Since you posted in Java forum you can use this http://www.steelbrothers.ch/jusb/ Learn it by yourself (no support on this one due to the nature of your application)

Just in case you want to verify input and not log the keys. This is limited to your application.

Snippet

addKeyListener(new KeyAdapter() 
		{
			public void keyTyped(KeyEvent e) 
			{
				// you can use this e.getKeyChar()
                                // or char c = KeyEvent.VK_(your selection here);
			}
		});

Digital Signature

vivhari3-Sep-09 20:26

vivhari

3-Sep-09 20:26

Hi everyone,

I planned to do a project in Digital Signature.

I just know how to Digitally Sign a Static document.

Now, I need to know, how to sign a document that has a dynamic content. Confused | :confused:

Can anyone help me to know, how to sign a dynamic content document!

I jus need the steps for how to sign a dynamic document.

Regards,

Vivek

vivhari3-Sep-09 20:56

vivhari

3-Sep-09 20:56

I need to implement the solution for the dynamic content digital signature as in the paper below!

Just for reference.... http://www.isg.rhul.ac.uk/cjm/dcaods.pdf

Nagy Vilmos3-Sep-09 22:02

Nagy Vilmos

3-Sep-09 22:02

so you have your reference doc, what have you tried?

If this is an accademic project [aka homework] the security of the signature is not too important, it is just the concept.
If this is commercial, then go out and buy a solution - it will be secure and properly tested.

Panic, Chaos, Destruction.
My work here is done.

42774804-Sep-09 10:50

4-Sep-09 10:50

Interesting project, so I believe the main issue is how to implement the aware application that replace the dynamic content from the document, the rest can be achieved easily including the security side notes.

Any one willing to suggest how to do the separation?

modified on Friday, September 4, 2009 10:46 PM

42774804-Sep-09 16:46

4-Sep-09 16:46

Ok since my last post I was thinking about how to implement (Just to learn more thats all) the digital awareness but came to a conclusion that for every application we would require to define its own awareness method which I find not practical. Luckily I remembered what we took in email security especially S/MIME the concept of envelop, therefore I thought why not do the same with this problem.

The solution is to convert the given file into a byte array text file and then digitally sign it.

The code I used is as follows (I was lazy to do the output for the data,key,sig) but its easy to do.

import java.io.FileInputStream;
import java.io.InputStream;
//import java.math.BigInteger;
import java.security.InvalidKeyException;
//import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
//import java.security.interfaces.DSAParams;
import java.security.interfaces.DSAPrivateKey;
import java.security.interfaces.DSAPublicKey;
//import java.security.spec.DSAPublicKeySpec;
//import java.security.spec.KeySpec;

public class SigningDocument 
{
	public static void main(String[] args) throws Exception 
	{
		InputStream in = new FileInputStream("dcaods.pdf");
		int bytesRead=0;
		int bytesToRead=1024;
		byte[] input = new byte[bytesToRead];
		while (bytesRead < bytesToRead) 
		{
			int result = in.read(input, bytesRead, bytesToRead - bytesRead);
			if (result == -1) break;
			bytesRead += result;
		}

		KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
		keyGen.initialize(1024);
		KeyPair keypair = keyGen.genKeyPair();
		DSAPrivateKey privateKey = (DSAPrivateKey)keypair.getPrivate();
		DSAPublicKey publicKey = (DSAPublicKey)keypair.getPublic();

		/* Data to be sent
		DSAParams dsaParams = privateKey.getParams();
		BigInteger p = dsaParams.getP();
		BigInteger q = dsaParams.getQ();
		BigInteger g = dsaParams.getG();
		BigInteger y = publicKey.getY();
		KeyFactory keyFactory = KeyFactory.getInstance("DSA");
		KeySpec publicKeySpec = new DSAPublicKeySpec(y, p, q, g);
		PublicKey publicKey2 = keyFactory.generatePublic(publicKeySpec);//rebuild key
		byte[] signature= createSignature(privateKey,input);
		*/

		byte[] signature= createSignature(privateKey,input);

		boolean v = verifySignature(publicKey,input,signature);

		System.out.print(v);
	}
	public static byte[] createSignature(PrivateKey key, byte[] buffer) 
	{
		try 
		{
			Signature sig = Signature.getInstance(key.getAlgorithm());
			sig.initSign(key);
			sig.update(buffer, 0, buffer.length);
			return sig.sign();
		} 
		catch (SignatureException e) {} 
		catch (InvalidKeyException e) {} 
		catch (NoSuchAlgorithmException e) {}
		
		return null;
	}
	public static boolean verifySignature(PublicKey key, byte[] buffer, byte[] signature) 
	{
		try 
		{
			Signature sig = Signature.getInstance(key.getAlgorithm());
			sig.initVerify(key);
			sig.update(buffer, 0, buffer.length);
			return sig.verify(signature);
		} 
		catch (SignatureException e) {}
		catch (InvalidKeyException e) {}
		catch (NoSuchAlgorithmException e) {}
		
		return false;
	}
}

What do you think guys?

vivhari5-Sep-09 5:34

vivhari

5-Sep-09 5:34

@Nagy Vilmos

I am doing this for my learning purpose only and not commercial.

@Member 4277480,
I can understand that you are converting a given file into a text file and digitally signing it.

But, again if the file is renamed the content will become dynamic. To get the true requirement
just have a look at http://www.unirc.it/firma/en/Buccafurri_ISSA_1008.pdf[^]
So, we need to remove the dynamic contents present in it or do some manipulations.

The thing is i cannot figure out how to remove the dynamic content or how to do some manipulations to make the content static. Confused | :confused:

Thanks in advance!!!

42774805-Sep-09 12:42