Mega Code Archive
Sends e-mail using a mailto
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/*
* Copyright (c) 2004 David Flanagan. All rights reserved.
* This code is from the book Java Examples in a Nutshell, 3nd Edition.
* It is provided AS-IS, WITHOUT ANY WARRANTY either expressed or implied.
* You may study, use, and modify it for any non-commercial purpose,
* including teaching and use in open-source projects.
* You may distribute it non-commercially as long as you retain this notice.
* For a commercial use license, or to purchase the book,
* please visit http://www.davidflanagan.com/javaexamples3.
*/
//package je3.net;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.URL;
import java.net.URLConnection;
/**
* This program sends e-mail using a mailto: URL
*/
public class SendMail {
public static void main(String[] args) {
try {
// If the user specified a mailhost, tell the system about it.
if (args.length >= 1)
System.getProperties().put("mail.host", args[0]);
// A Reader stream to read from the console
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
// Ask the user for the from, to, and subject lines
System.out.print("From: ");
String from = in.readLine();
System.out.print("To: ");
String to = in.readLine();
System.out.print("Subject: ");
String subject = in.readLine();
// Establish a network connection for sending mail
URL u = new URL("mailto:" + to); // Create a mailto: URL
URLConnection c = u.openConnection(); // Create its URLConnection
c.setDoInput(false); // Specify no input from it
c.setDoOutput(true); // Specify we'll do output
System.out.println("Connecting..."); // Tell the user
System.out.flush(); // Tell them right now
c.connect(); // Connect to mail host
PrintWriter out = // Get output stream to host
new PrintWriter(new OutputStreamWriter(c.getOutputStream()));
// We're talking to the SMTP server now.
// Write out mail headers. Don't let users fake the From address
out.print("From: \"" + from + "\" <" + System.getProperty("user.name") + "@"
+ InetAddress.getLocalHost().getHostName() + ">\r\n");
out.print("To: " + to + "\r\n");
out.print("Subject: " + subject + "\r\n");
out.print("\r\n"); // blank line to end the list of headers
// Now ask the user to enter the body of the message
System.out.println("Enter the message. " + "End with a '.' on a line by itself.");
// Read message line by line and send it out.
String line;
for (;;) {
line = in.readLine();
if ((line == null) || line.equals("."))
break;
out.print(line + "\r\n");
}
// Close (and flush) the stream to terminate the message
out.close();
// Tell the user it was successfully sent.
System.out.println("Message sent.");
} catch (Exception e) { // Handle any exceptions, print error message.
System.err.println(e);
System.err.println("Usage: java SendMail [<mailhost>]");
}
}
}
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