Javamail实现邮件发送

想为游戏服务器添加一个自动报警功能，所以需要发送邮件，直接下载了Javamail，里面的例子可以直接使用，下面说明一下使用方法。

/*
* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*   - Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*
*   - Redistributions in binary form must reproduce the above copyright
*     notice, this list of conditions and the following disclaimer in the
*     documentation and/or other materials provided with the distribution.
*
*   - Neither the name of Sun Microsystems nor the names of its
*     contributors may be used to endorse or promote products derived
*     from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Date;
import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.URLName;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import com.sun.mail.smtp.SMTPAddressFailedException;
import com.sun.mail.smtp.SMTPAddressSucceededException;
import com.sun.mail.smtp.SMTPSendFailedException;
import com.sun.mail.smtp.SMTPTransport;
/**
* Demo app that shows how to construct and send an RFC822 (singlepart) message.
*
* XXX - allow more than one recipient on the command line
*
* This is just a variant of msgsend.java that demonstrates use of some
* SMTP-specific features.
*
* @author Max Spivak
* @author Bill Shannon
*/
public class smtpsend {
/**
* Example of how to extend the SMTPTransport class. This example
* illustrates how to issue the XACT command before the SMTPTransport issues
* the DATA command.
*
* public static class SMTPExtension extends SMTPTransport { public
* SMTPExtension(Session session, URLName url) { super(session, url); // to
* check that we're being used
* System.out.println("SMTPExtension: constructed"); }
*
* protected synchronized OutputStream data() throws MessagingException { if
* (supportsExtension("XACCOUNTING")) issueCommand("XACT", 250); return
* super.data(); } }
*/
public static void main(String[] argv) {
String to, subject = null, from = null, cc = null, bcc = null, url = null;
String mailhost = null;
String mailer = "smtpsend";
String file = null;
String protocol = null, host = null, user = null, password = null;
String record = null; // name of folder in which to record mail
boolean debug = false;
boolean verbose = false;
boolean auth = false;
String prot = "smtp";
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
int optind;
/*
* Process command line arguments.
*/
for (optind = 0; optind < argv.length; optind++) {
if (argv[optind].equals("-T")) {
protocol = argv[++optind];
} else if (argv[optind].equals("-H")) {
host = argv[++optind];
} else if (argv[optind].equals("-U")) {
user = argv[++optind];
} else if (argv[optind].equals("-P")) {
password = argv[++optind];
} else if (argv[optind].equals("-M")) {
mailhost = argv[++optind];
} else if (argv[optind].equals("-f")) {
record = argv[++optind];
} else if (argv[optind].equals("-a")) {
file = argv[++optind];
} else if (argv[optind].equals("-s")) {
subject = argv[++optind];
} else if (argv[optind].equals("-o")) { // originator
from = argv[++optind];
} else if (argv[optind].equals("-c")) {
cc = argv[++optind];
} else if (argv[optind].equals("-b")) {
bcc = argv[++optind];
} else if (argv[optind].equals("-L")) {
url = argv[++optind];
} else if (argv[optind].equals("-d")) {
debug = true;
} else if (argv[optind].equals("-v")) {
verbose = true;
} else if (argv[optind].equals("-A")) {
auth = true;
} else if (argv[optind].equals("-S")) {
prot = "smtps";
} else if (argv[optind].equals("--")) {
optind++;
break;
} else if (argv[optind].startsWith("-")) {
System.out
.println("Usage: smtpsend [[-L store-url] | [-T prot] [-H host] [-U user] [-P passwd]]");
System.out
.println("/t[-s subject] [-o from-address] [-c cc-addresses] [-b bcc-addresses]");
System.out
.println("/t[-f record-mailbox] [-M transport-host] [-d] [-a attach-file]");
System.out.println("/t[-v] [-A] [-S] [address]");
System.exit(1);
} else {
break;
}
}
try {
/*
* Prompt for To and Subject, if not specified.
*/
if (optind < argv.length) {
// XXX - concatenate all remaining arguments
to = argv[optind];
System.out.println("To: " + to);
} else {
System.out.print("To: ");
System.out.flush();
to = in.readLine();
}
if (subject == null) {
System.out.print("Subject: ");
System.out.flush();
subject = in.readLine();
} else {
System.out.println("Subject: " + subject);
}
/*
* Initialize the JavaMail Session.
*/
Properties props = System.getProperties();
if (mailhost != null)
props.put("mail." + prot + ".host", mailhost);
if (auth)
props.put("mail." + prot + ".auth", "true");
/*
* Create a Provider representing our extended SMTP transport and
* set the property to use our provider.
*
* Provider p = new Provider(Provider.Type.TRANSPORT, prot,
* "smtpsend$SMTPExtension", "JavaMail demo", "no version");
* props.put("mail." + prot + ".class", "smtpsend$SMTPExtension");
*/
// Get a Session object
Session session = Session.getInstance(props, null);
if (debug)
session.setDebug(true);
/*
* Register our extended SMTP transport.
*
* session.addProvider(p);
*/
/*
* Construct the message and send it.
*/
Message msg = new MimeMessage(session);
if (from != null)
msg.setFrom(new InternetAddress(from));
else
msg.setFrom();
msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(
to, false));
if (cc != null)
msg.setRecipients(Message.RecipientType.CC, InternetAddress
.parse(cc, false));
if (bcc != null)
msg.setRecipients(Message.RecipientType.BCC, InternetAddress
.parse(bcc, false));
msg.setSubject(subject);
String text = collect(in);
if (file != null) {
// Attach the specified file.
// We need a multipart message to hold the attachment.
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText(text);
MimeBodyPart mbp2 = new MimeBodyPart();
mbp2.attachFile(file);
MimeMultipart mp = new MimeMultipart();
mp.addBodyPart(mbp1);
mp.addBodyPart(mbp2);
msg.setContent(mp);
} else {
// If the desired charset is known, you can use
// setText(text, charset)
msg.setText(text);
}
msg.setHeader("X-Mailer", mailer);
msg.setSentDate(new Date());
// send the thing off
/*
* The simple way to send a message is this:
*
* Transport.send(msg);
*
* But we're going to use some SMTP-specific features for
* demonstration purposes so we need to manage the Transport object
* explicitly.
*/
SMTPTransport t = (SMTPTransport) session.getTransport(prot);
try {
if (auth)
t.connect(mailhost, user, password);
else
t.connect();
t.sendMessage(msg, msg.getAllRecipients());
} finally {
if (verbose)
System.out
.println("Response: " + t.getLastServerResponse());
t.close();
}
System.out.println("/nMail was sent successfully.");
/*
* Save a copy of the message, if requested.
*/
if (record != null) {
// Get a Store object
Store store = null;
if (url != null) {
URLName urln = new URLName(url);
store = session.getStore(urln);
store.connect();
} else {
if (protocol != null)
store = session.getStore(protocol);
else
store = session.getStore();
// Connect
if (host != null || user != null || password != null)
store.connect(host, user, password);
else
store.connect();
}
// Get record Folder. Create if it does not exist.
Folder folder = store.getFolder(record);
if (folder == null) {
System.err.println("Can't get record folder.");
System.exit(1);
}
if (!folder.exists())
folder.create(Folder.HOLDS_MESSAGES);
Message[] msgs = new Message[1];
msgs[0] = msg;
folder.appendMessages(msgs);
System.out.println("Mail was recorded successfully.");
}
} catch (Exception e) {
/*
* Handle SMTP-specific exceptions.
*/
if (e instanceof SendFailedException) {
MessagingException sfe = (MessagingException) e;
if (sfe instanceof SMTPSendFailedException) {
SMTPSendFailedException ssfe = (SMTPSendFailedException) sfe;
System.out.println("SMTP SEND FAILED:");
if (verbose)
System.out.println(ssfe.toString());
System.out.println("  Command: " + ssfe.getCommand());
System.out.println("  RetCode: " + ssfe.getReturnCode());
System.out.println("  Response: " + ssfe.getMessage());
} else {
if (verbose)
System.out.println("Send failed: " + sfe.toString());
}
Exception ne;
while ((ne = sfe.getNextException()) != null
&& ne instanceof MessagingException) {
sfe = (MessagingException) ne;
if (sfe instanceof SMTPAddressFailedException) {
SMTPAddressFailedException ssfe = (SMTPAddressFailedException) sfe;
System.out.println("ADDRESS FAILED:");
if (verbose)
System.out.println(ssfe.toString());
System.out.println("  Address: " + ssfe.getAddress());
System.out.println("  Command: " + ssfe.getCommand());
System.out
.println("  RetCode: " + ssfe.getReturnCode());
System.out.println("  Response: " + ssfe.getMessage());
} else if (sfe instanceof SMTPAddressSucceededException) {
System.out.println("ADDRESS SUCCEEDED:");
SMTPAddressSucceededException ssfe = (SMTPAddressSucceededException) sfe;
if (verbose)
System.out.println(ssfe.toString());
System.out.println("  Address: " + ssfe.getAddress());
System.out.println("  Command: " + ssfe.getCommand());
System.out
.println("  RetCode: " + ssfe.getReturnCode());
System.out.println("  Response: " + ssfe.getMessage());
}
}
} else {
System.out.println("Got Exception: " + e);
if (verbose)
e.printStackTrace();
}
}
}
/**
* Read the body of the message until EOF.
*/
public static String collect(BufferedReader in) throws IOException {
String line;
StringBuffer sb = new StringBuffer();
while ((line = in.readLine()) != null) {
sb.append(line);
sb.append("/n");
}
return sb.toString();
}
}

在调试的时候，需要配置一下邮件发送的必要参数，如图：



-M 是用于指定邮件发送用的smtp服务器，之后的-o就是我们自己的邮箱，因为服务器必须知道是哪个邮箱要发送邮件，-U和-P代表的就是用户名密码，-A是告诉程序我们需要使用身份验证功能。OK，接下来 Debug As -> Java Application 就可以了！

PS：程序执行过程中需要询问发送到哪个邮箱，邮件标题和邮件正文是什么，在输入邮件主题后按回车，这时就进入正文输入环节，这个地方不会自动判断输入完毕，需要使用Ctrl+D来终止输入，之后程序才会执行邮件发送。