因?yàn)镴ava在開發(fā)網(wǎng)頁(yè)上占有絕大優(yōu)勢(shì)。所以作為web端的領(lǐng)軍人物，譬如發(fā)送短信和發(fā)送郵件這些就成了必定，網(wǎng)絡(luò)安全一再安全我們須要把賬號(hào)的安全級(jí)別提到更高。因此這些對(duì)于開發(fā)者也就成了必須掌握的技能！我一直都認(rèn)為作為開發(fā)者，不怕在開發(fā)的過(guò)程中遇到多少難題，而是有沒(méi)有去解決它的勇氣和決心，這里多學(xué)習(xí)就成為了關(guān)鍵，成為了一個(gè)程序員發(fā)展的重中之重！好啦。閑話就講到這里。來(lái)點(diǎn)實(shí)際的。

當(dāng)一個(gè)開發(fā)者工作到一定程度后，面向?qū)ο蟮乃季S就會(huì)一直在他的老子里環(huán)繞。所以我們先把郵件的常量類、實(shí)體類以及工具類等等先該封裝的封裝，該繼承的繼承！代碼來(lái)了。睜大眼睛：

/*** @Description: ** @Title: SimpleMail.java* @Package com.joyce.bean* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 上午09:06:51* @version V2.0*/ package com.joyce.mail.bean;/*** @Description:郵件信息類* * @ClassName: SimpleMail* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午09:06:51* @version V2.0*/ public class Mail {/*** 主題*/private String subject;/*** 內(nèi)容*/private String content;/*** @return the subject*/public String getSubject() {return subject;}/*** @param subject* the subject to set*/public void setSubject(String subject) {this.subject = subject;}/*** @return the content*/public String getContent() {return content;}/*** @param content* the content to set*/public void setContent(String content) {this.content = content;} }
上面大家看到的就是發(fā)送郵件一般不可缺少的郵件標(biāo)題和郵件內(nèi)容，作為在郵件使用廣泛的那就免不了封裝起來(lái)了，好啦。接下來(lái)咱們看郵箱的登錄類：/*** @Description: ** @Title: MailAuthenticator.java* @Package com.joyce.bean* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 上午08:59:11* @version V2.0*/ package com.joyce.mail.bean;import javax.mail.Authenticator; import javax.mail.PasswordAuthentication;/*** @Description: 郵箱登錄類** @ClassName: MailAuthenticator* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 上午08:59:11* @version V2.0*/ public class MailAuthenticator extends Authenticator {/*** 用戶名（登錄郵箱）*/private String username;/*** 密碼*/private String password;/*** @return the username*/public String getUsername() {return username;}/*** @param username the username to set*/public void setUsername(String username) {this.username = username;}/*** @return the password*/public String getPassword() {return password;}/*** @param password the password to set*/public void setPassword(String password) {this.password = password;}/*** @param username* @param password*/public MailAuthenticator(String username, String password) {this.username = username;this.password = password;}@Overrideprotected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication(username, password);} }
這時(shí)候我們須要的常量類就應(yīng)該進(jìn)來(lái)了package com.joyce.mail.bean;import java.text.SimpleDateFormat; import java.util.Date;/*** @Description: 郵件發(fā)送常量類** @ClassName: MailConstant* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 上午11:01:16* @version V2.0*/ public class MailConstant {public static final String MAIL_USER = "luo201227@163.com"; public static final String MAIL_PWD = "*****";public static final boolean MAIL_IFDEBUG = true;public static final String MAIL_CONTENT_CHARSET = "text/html;charset=utf-8"; public static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 HH時(shí)mm分ss秒 E");public static final String MAIL_TITLE = "*********賬號(hào)激活碼" + sdf.format(new Date());//郵件標(biāo)題public static String getMailContent(String content){StringBuffer sb = new StringBuffer();sb.append("<div style='width:1024px;height:auto;margin:0px auto;background-color:#66CCFF;font-size:14px;font-family:微軟雅黑;border-radius:5px;padding:5px;'><center><h1>");sb.append("</h1></center><div style='margin-left:20px;margin-bottom:10px;'><b>尊敬的用戶。您好！

</b><br/><br/>"); sb.append("????<b></b>"+content); sb.append("</div></div>"); return sb.toString(); } }

關(guān)鍵來(lái)了，看看發(fā)送郵件的關(guān)鍵部分吧/*** @Description: ** @Title: MailSender.java* @Package com.joyce.service.impl* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 上午09:03:08* @version V2.0*/ package com.hupu.nac.mail.sender;import java.io.File; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Properties; import java.util.Vector;import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.BodyPart; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.AddressException; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart;import com.hupu.nac.mail.bean.Mail; import com.hupu.nac.mail.bean.MailAuthenticator; import com.hupu.nac.mail.bean.MailConstant;/*** @Description:郵件發(fā)送類* * @ClassName: MailSender* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午09:03:08* @version V2.0*/ public class MailSender {/*** 發(fā)送郵件的props文件*/private final transient Properties props = new Properties();/*** 郵件server登錄驗(yàn)證*/private transient MailAuthenticator authenticator;/*** 郵箱session*/private transient Session session;/*** 初始化郵件發(fā)送器* * @param smtpHostName* SMTP郵件server地址* @param username* 發(fā)送郵件的用戶名(地址)* @param password* 發(fā)送郵件的密碼*/public MailSender(final String smtpHostName, final String username,final String password) {init(username, password, smtpHostName);}/*** 初始化郵件發(fā)送器* * @param username* 發(fā)送郵件的用戶名(地址)，并以此解析SMTPserver地址* @param password* 發(fā)送郵件的密碼*/public MailSender(final String username, final String password) {// 通過(guò)郵箱地址解析出smtpserver。對(duì)大多數(shù)郵箱都管用final String smtpHostName = "smtp." + username.split("@")[1];init(username, password, smtpHostName);}/*** @Description: 初始化* * @param username* 發(fā)送郵件的用戶名(地址)* @param password* 密碼* @param smtpHostName* SMTP主機(jī)地址* * @Title: MailSender.java* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午09:18:31* @version V2.0*/private void init(String username, String password, String smtpHostName) {// 初始化propsprops.put("mail.smtp.host", smtpHostName);props.put("mail.smtp.auth", "true");// 驗(yàn)證authenticator = new MailAuthenticator(username, password);// 創(chuàng)建sessionsession = Session.getInstance(props, authenticator);// 打印一些調(diào)試信息session.setDebug(MailConstant.MAIL_IFDEBUG);}/*** @Description: 發(fā)送郵件* * @param recipient* 收件人郵箱地址* @param subject* 郵件主題* @param content* 郵件內(nèi)容* @throws AddressException* @throws MessagingException* * @Title: MailSender.java* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午09:19:16* @version V2.0*/public void send(String recipient, String subject, Object content) throws Exception {send(recipient, subject, content, null);}/*** 發(fā)送郵件* * @param recipient* 收件人郵箱地址* @param subject* 郵件主題* @param content* 郵件內(nèi)容* @param files* 附件* @throws Exception* @author Joyce.Luo* @date 2014-10-15 上午10:23:09* @version V3.0* @since Tomcat6.0,Jdk1.6* @copyright: Copyright (c) 2014*/public void send(String recipient, String subject, Object content, Vector<File> files) throws Exception {// 創(chuàng)建mime類型郵件final MimeMessage message = new MimeMessage(session);// 設(shè)置發(fā)信人message.setFrom(new InternetAddress(authenticator.getUsername()));// 設(shè)置收件人message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipient));// 設(shè)置主題message.setSubject(subject);// 設(shè)置郵件內(nèi)容if (null == files || files.size() == 0) {message.setContent(content.toString(), MailConstant.MAIL_CONTENT_CHARSET);} else {//創(chuàng)建 Mimemultipart加入內(nèi)容(可包括多個(gè)附件)MimeMultipart multipart = new MimeMultipart();//MimeBodyPart(用于信件內(nèi)容/附件)BodyPart bodyPart = new MimeBodyPart();bodyPart.setContent(content.toString(), MailConstant.MAIL_CONTENT_CHARSET);//加入到MimeMultipart對(duì)象中multipart.addBodyPart(bodyPart);for (int i = 0; i < files.size(); i++) {File file = (File) files.elementAt(i);String fname = file.getName();//創(chuàng)建FileDAtaSource(用于加入附件)FileDataSource fds = new FileDataSource(file);BodyPart fileBodyPart = new MimeBodyPart();// 字符流形式裝入文件fileBodyPart.setDataHandler(new DataHandler(fds));// 設(shè)置附件文件名稱fileBodyPart.setFileName(fname);multipart.addBodyPart(fileBodyPart);message.setContent(multipart);}}// 設(shè)置發(fā)信時(shí)間message.setSentDate(new Date());// 存儲(chǔ)郵件信息message.saveChanges(); // message.setFileName(filename)// 發(fā)送郵件Transport.send(message);}/*** @Description: 群發(fā)郵件* * @param recipients* 收件人們* @param subject* 主題* @param content* 內(nèi)容* @throws AddressException* @throws MessagingException* * @Title: MailSender.java* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午09:20:24* @version V2.0*/public void send(List<String> recipients, String subject, Object content) throws Exception {send(recipients, subject, content, null);}/*** 群發(fā)郵件* * @param recipients* 收件人們* @param subject* 主題* @param content* 內(nèi)容* @param files* 附件* @throws Exception* @author Joyce.Luo* @date 2014-10-15 上午10:26:35* @version V3.0* @since Tomcat6.0,Jdk1.6* @copyright: Copyright (c) 2014*/public void send(List<String> recipients, String subject, Object content, Vector<File> files) throws Exception {// 創(chuàng)建mime類型郵件final MimeMessage message = new MimeMessage(session);// 設(shè)置發(fā)信人message.setFrom(new InternetAddress(authenticator.getUsername()));// 設(shè)置收件人們final int num = recipients.size();InternetAddress[] addresses = new InternetAddress[num];for (int i = 0; i < num; i++) {addresses[i] = new InternetAddress(recipients.get(i));}message.setRecipients(Message.RecipientType.TO, addresses);// 設(shè)置主題message.setSubject(subject);// 設(shè)置郵件內(nèi)容if (null == files || files.size() == 0) {message.setContent(content.toString(), MailConstant.MAIL_CONTENT_CHARSET);} else {//創(chuàng)建 Mimemultipart加入內(nèi)容(可包括多個(gè)附件)MimeMultipart multipart = new MimeMultipart();//MimeBodyPart(用于信件內(nèi)容/附件)BodyPart bodyPart = new MimeBodyPart();bodyPart.setContent(content.toString(), MailConstant.MAIL_CONTENT_CHARSET);//加入到MimeMultipart對(duì)象中multipart.addBodyPart(bodyPart);for (int i = 0; i < files.size(); i++) {File file = (File) files.elementAt(i);String fname = file.getName();//創(chuàng)建FileDAtaSource(用于加入附件)FileDataSource fds = new FileDataSource(file);BodyPart fileBodyPart = new MimeBodyPart();// 字符流形式裝入文件fileBodyPart.setDataHandler(new DataHandler(fds));// 設(shè)置附件文件名稱fname = new String(fname.getBytes("UTF-8"), "ISO-8859-1");fileBodyPart.setFileName(fname);multipart.addBodyPart(fileBodyPart);message.setContent(multipart);}}// 設(shè)置發(fā)信時(shí)間message.setSentDate(new Date());// 存儲(chǔ)郵件信息message.saveChanges();// 發(fā)送郵件Transport.send(message);}/*** @Description: 發(fā)送郵件* * @param recipient* 收件人郵箱地址* @param mail* 郵件對(duì)象* @throws Exception* * @Title: MailSender.java* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午09:20:54* @version V2.0*/public void send(String recipient, Mail mail) throws Exception {send(recipient, mail.getSubject(), mail.getContent());}/*** @Description: 群發(fā)郵件* * @param recipients* 收件人們* @param mail* 郵件對(duì)象* @throws Exception* * @Title: MailSender.java* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午09:21:19* @version V2.0*/public void send(List<String> recipients, Mail mail) throws Exception {send(recipients, mail.getSubject(), mail.getContent());}/*** 群發(fā)郵件* * @param recipients* 收件人們* @param mail* 郵件對(duì)象* @param files* 附件* @throws Exception* @author Joyce.Luo* @date 2014-10-15 上午10:28:38* @version V3.0* @since Tomcat6.0,Jdk1.6* @copyright: Copyright (c) 2014*/public void send(List<String> recipients, Mail mail, Vector<File> files) throws Exception {send(recipients, mail.getSubject(), mail.getContent(), files);} }

在網(wǎng)頁(yè)上的激活碼或者驗(yàn)證碼這類的就不用多說(shuō)了吧/*** @Description: ** @Title: RandomCodeUtil.java* @Package com.joyce.mail.util* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 上午11:07:34* @version V2.0*/ package com.joyce.mail.util;/*** @Description: 隨機(jī)碼工具類* * @ClassName: RandomCodeUtil* @Copyright: Copyright (c) 2014* * @author Comsys-LZP* @date 2014-5-28 上午11:07:34* @version V2.0*/ public class RandomCodeUtil {/*** 隨機(jī)碼集合*/private static final String[] randCode = { "0", "1", "2", "3", "4", "5", "6","7", "8", "9", "q", "w", "e", "r", "t", "y", "u", "i", "o", "p","a", "s", "d", "f", "g", "h", "j", "k", "l", "z", "x", "c", "v","b", "n", "m" };/*** @Description: 產(chǎn)生指定長(zhǎng)度的隨機(jī)碼** @param codeLength* @return** @Title: RandomCodeUtil.java* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 上午11:11:55* @version V2.0*/public static String randomCode(Integer codeLength) throws Exception {try {StringBuffer code = new StringBuffer();if(null == codeLength || 0 == codeLength){codeLength = 4;}for (int i = 0; i < codeLength; i++) {code.append(randCode[(int)Math.floor(Math.random() * 36)]);}return code.toString();} catch (Exception e) {throw new RuntimeException("Random Code Error");}}/*** @Description: 生成長(zhǎng)度為4的隨機(jī)碼** @return* @throws Exception** @Title: RandomCodeUtil.java* @Copyright: Copyright (c) 2014** @author Comsys-LZP* @date 2014-5-28 下午01:19:33* @version V2.0*/public static String randomCode() throws Exception{return randomCode(null);} }

Ok。利用javax.mail.jar發(fā)送郵件就大功告成了！是不是非常easy呢。完整的demo資源;下載地址：http://download.csdn.net/download/luo201227/7446279

有段時(shí)間了。來(lái)更新一下。事實(shí)上也沒(méi)有什么非常多要說(shuō)的，僅僅是跟大家提一下。假設(shè)有興趣的，能夠去了解一下James郵件server的搭建！

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