基于SMTP发送一个简单的邮件

首先，需要一个认证器：

package No001_基于SMTP的文本邮件;

import javax.mail.Authenticator;

import javax.mail.PasswordAuthentication;

public class SimpleAuthenticator extends Authenticator {

private String username;

private String password;

public SimpleAuthenticator(String username, String password) {

super();

this.username = username;

this.password = password;

}

protected PasswordAuthentication getPasswordAuthentication() {

return new PasswordAuthentication(username, password);

}

}

然后，书写简单的发送邮件程序：

package No001_基于SMTP的文本邮件;

import java.util.Properties;

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.MimeMessage;

public class SMTPSimpleMail {

public static void main(String[] args) throws AddressException, MessagingException {

/* 必需的信息 */

String SMTP_MAIL_HOST = "smtp.163.com"; // 此邮件服务器地址，自行去所属邮件查询

String EMAIL_USERNAME = "example_email@163.com";

String EMAIL_PASSWORD = "mypassword";

String TO_EMAIL_ADDRESS = "example_email_too@qq.com";

/* 服务器信息 */

Properties props = new Properties();

props.put("mail.smtp.host", SMTP_MAIL_HOST);

props.put("mail.smtp.auth", "true");

/* 创建Session */

Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));

/* 邮件信息 */

MimeMessage message = new MimeMessage(session);

message.setFrom(new InternetAddress(EMAIL_USERNAME));

message.addRecipient(Message.RecipientType.TO, new InternetAddress(TO_EMAIL_ADDRESS));

message.setSubject("how to use java mail to send email.(Title)(001)");

message.setText("how to use java mail to send email.(Content)");

// 发送

Transport.send(message);

System.out.println("不是特别倒霉，你可以去查收邮件了。");

}

}

各种收件人、抄送人、秘密抄送人，怎么办

认证器沿用，略。

其实就是设置、追加多个收件人、抄送人、秘密抄送人：

package No002_各种发件人收件人抄送人怎么办;

import java.io.UnsupportedEncodingException;

import java.util.Properties;

import javax.mail.Address;

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.MimeMessage;

public class SendMailWithMultiPeople {

public static void main(String[] args) throws AddressException, MessagingException, UnsupportedEncodingException {

/* 必需的信息 */

String SMTP_MAIL_HOST = "smtp.163.com"; // 此邮件服务器地址，自行去所属邮件查询

String EMAIL_USERNAME = "example@163.com";

String EMAIL_PASSWORD = "mypassword";

String TO_EMAIL_ADDRESS_1 = "example@163.com";

String CC_EMAIL_ADDRESS_1 = "example@163.com";

String BCC_EMAIL_ADDRESS_1 = "example@163.com";

/* 服务器信息 */

Properties props = new Properties();

props.put("mail.smtp.host", SMTP_MAIL_HOST);

props.put("mail.smtp.auth", "true");

/* 创建Session */

Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));

/* 发件人 */

Address[] senderArray = new Address[1];

senderArray[0] = new InternetAddress("example@163.com", "Nick Huang");

/* 邮件信息 */

MimeMessage message = new MimeMessage(session);

message.addFrom(senderArray);

message.addRecipient(Message.RecipientType.TO, new InternetAddress(TO_EMAIL_ADDRESS_1));

message.addRecipient(Message.RecipientType.TO, new InternetAddress(CC_EMAIL_ADDRESS_1));

message.addRecipient(Message.RecipientType.CC, new InternetAddress(CC_EMAIL_ADDRESS_1));

message.addRecipient(Message.RecipientType.CC, new InternetAddress(TO_EMAIL_ADDRESS_1));

message.addRecipient(Message.RecipientType.BCC, new InternetAddress(BCC_EMAIL_ADDRESS_1));

message.setSubject("我是一封学习Java Mail的邮件");

message.setText("我是一封学习Java Mail的邮件的内容，请邮件过滤器高抬贵手。");

// 发送

Transport.send(message);

System.out.println("不是特别倒霉，你可以去查收邮件了。");

}

}

发送附件怎么办

认证器沿用，略。

发送附件demo：

package No003_发送附件怎么办;

import java.io.File;

import java.io.UnsupportedEncodingException;

import java.util.Properties;

import javax.activation.DataHandler;

import javax.activation.DataSource;

import javax.activation.FileDataSource;

import javax.mail.Address;

import javax.mail.BodyPart;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Multipart;

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;

public class SendMailWithAttachment {

public static void main(String[] args) throws AddressException, MessagingException, UnsupportedEncodingException {

/* 必需的信息 */

String SMTP_MAIL_HOST = "smtp.163.com"; // 此邮件服务器地址，自行去所属邮件查询

String EMAIL_USERNAME = "example@163.com";

String EMAIL_PASSWORD = "password";

String TO_EMAIL_ADDRESS_1 = "example@163.com";

/* 服务器信息 */

Properties props = new Properties();

props.put("mail.smtp.host", SMTP_MAIL_HOST);

props.put("mail.smtp.auth", "true");

/* 创建Session */

Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));

/* 发件人 */

Address[] senderArray = new Address[1];

senderArray[0] = new InternetAddress(EMAIL_USERNAME);

/* 邮件信息 */

MimeMessage message = new MimeMessage(session);

message.addFrom(senderArray);

message.addRecipient(Message.RecipientType.TO, new InternetAddress(TO_EMAIL_ADDRESS_1));

message.setSubject("我是一封学习Java Mail的邮件");

BodyPart bodyPart = new MimeBodyPart();

bodyPart.setText("这是一封学习Java Mail的邮件的内容，请邮件过滤器高抬贵手。");

/* 附件 */

BodyPart attachmentPart1 = new MimeBodyPart();

DataSource source = new FileDataSource(new File("D:/文件壹.txt"));

attachmentPart1.setDataHandler(new DataHandler(source));

attachmentPart1.setFileName("=?GBK?B?" + new sun.misc.BASE64Encoder().encode("文件壹.txt".getBytes()) + "?=");

BodyPart attachmentPart2 = new MimeBodyPart();

source = new FileDataSource(new File("D:/文件贰.txt"));

attachmentPart2.setDataHandler(new DataHandler(source));

attachmentPart2.setFileName("=?GBK?B?" + new sun.misc.BASE64Encoder().encode("文件贰.txt".getBytes()) + "?=");

Multipart multipart = new MimeMultipart();

multipart.addBodyPart(bodyPart);

multipart.addBodyPart(attachmentPart1);

multipart.addBodyPart(attachmentPart2);

message.setContent(multipart);

// 发送

Transport.send(message);

System.out.println("不是特别倒霉，你可以去查收邮件了。");

}

}

还有，发送HTML邮件

认证器沿用，略。

其实就是告诉收件客户端用HTML解析渲染：

package No004_发送HTML邮件;

import java.io.UnsupportedEncodingException;

import java.util.Properties;

import javax.mail.Address;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Multipart;

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;

public class HowToSendHTMLMail {

public static void main(String[] args) throws AddressException, MessagingException, UnsupportedEncodingException {

/* 必需的信息 */

String SMTP_MAIL_HOST = "smtp.163.com"; // 此邮件服务器地址，自行去所属邮件查询

String EMAIL_USERNAME = "example@163.com";

String EMAIL_PASSWORD = "password";

String TO_EMAIL_ADDRESS_1 = "example@163.com";

/* 服务器信息 */

Properties props = new Properties();

props.put("mail.smtp.host", SMTP_MAIL_HOST);

props.put("mail.smtp.auth", "true");

/* 创建Session */

Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));

/* 发件人 */

Address[] senderArray = new Address[1];

senderArray[0] = new InternetAddress(EMAIL_USERNAME);

/* 邮件信息 */

MimeMessage message = new MimeMessage(session);

message.addFrom(senderArray);

message.addRecipient(Message.RecipientType.TO, new InternetAddress(TO_EMAIL_ADDRESS_1));

message.setSubject("如何发送HTML的邮件");

/* 正文 */

MimeBodyPart bodyPart = new MimeBodyPart();

bodyPart.setContent("

loving you...", "text/html;charset=gb2312");

/* 封装邮件各部分信息 */

Multipart multipart = new MimeMultipart();

multipart.addBodyPart(bodyPart);

message.setContent(multipart);

// 发送

Transport.send(message);

System.out.println("不是特别倒霉，你可以去查收邮件了。");

}

}

要不，来个工具类?

认证器是一定的，沿用，略。

由于需要设置的属性多且繁杂，用个自己人简单易用的属性命名，所以来一个配置类

package No005_来一个工具类;

import java.io.File;

import java.util.ArrayList;

import java.util.List;

public class MailSenderConfig {

private String SMTPMailHost; // 支持SMTP协议的邮件服务器地址

/* 用于登录邮件服务器 */

private String username;

private String password;

private String subject; // 标题

private String content; // 内容

private String fromMail; // 显示从此邮箱发出邮件

private List toMails; // 收件人

private List ccMails; // 抄送人

private List bccMails; // 秘密抄送人

private List attachments; // 附件

public MailSenderConfig(String sMTPMailHost, String subject,

String content, String fromMail) {

super();

SMTPMailHost = sMTPMailHost;

this.subject = subject;

this.content = content;

this.fromMail = fromMail;

}

public String getSMTPMailHost() {

return SMTPMailHost;

}

public void setSMTPMailHost(String sMTPMailHost) {

SMTPMailHost = sMTPMailHost;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getFromMail() {

return fromMail;

}

public void setFromMail(String fromMail) {

this.fromMail = fromMail;

}

public List getToMails() {

return toMails;

}

public void setToMails(List toMails) {

this.toMails = toMails;

}

public List getCcMails() {

return ccMails;

}

public void setCcMails(List ccMails) {

this.ccMails = ccMails;

}

public List getBccMails() {

return bccMails;

}

public void setBccMails(List bccMails) {

this.bccMails = bccMails;

}

public List getAttachments() {

return attachments;

}

public void setAttachments(List attachments) {

this.attachments = attachments;

}

public String getSubject() {

return subject;

}

public void setSubject(String subject) {

this.subject = subject;

}

public String getContent() {

return content;

}

public void setContent(String content) {

this.content = content;

}

public void addToMail (String mail) {

if (this.toMails == null) {

this.toMails = new ArrayList();

}

this.toMails.add(mail);

}

public void addCcMail (String mail) {

if (this.ccMails == null) {

this.ccMails = new ArrayList();

}

this.ccMails.add(mail);

}

public void addBccMail (String mail) {

if (this.bccMails == null) {

this.bccMails = new ArrayList();

}

this.bccMails.add(mail);

}

public void addAttachment (File f) {

if (this.attachments == null) {

this.attachments = new ArrayList();

}

this.attachments.add(f);

}

}

最后，就是工具类的部分，主要负责几个事情：按照Java Mail规则作些初始化动作、将自定义的属性配置类翻译并以Java Mail规则设置、发送邮件。

还有，需要提下的是，因为工具类所提供的代替设置的属性有限，更多的情况可能不满足需要，所以暴露出MimeMessage，在不满足需求的情况开发者可自行加工配置，而其他部分仍可沿用工具类。

package No005_来一个工具类;

import java.io.File;

import java.util.Properties;

import javax.activation.DataHandler;

import javax.activation.DataSource;

import javax.activation.FileDataSource;

import javax.mail.Address;

import javax.mail.BodyPart;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Multipart;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

import No002_各种发件人收件人抄送人怎么办.SimpleAuthenticator;

public class MailSender {

private MailSenderConfig c;

private MimeMessage message;

public MailSender(MailSenderConfig config) throws Exception {

super();

this.c = config;

this.setConfig();

}

/**

* 初始化

* @return

*/

private Session initSession() {

Properties props = new Properties();

if (c.getSMTPMailHost() != null && c.getSMTPMailHost().length() > 0) {

props.put("mail.smtp.host", c.getSMTPMailHost());

}

if (c.getUsername() != null && c.getUsername().length() > 0 &&

c.getPassword() != null && c.getPassword().length() > 0) {

props.put("mail.smtp.auth", "true");

return Session.getDefaultInstance(props, new SimpleAuthenticator(c.getUsername(), c.getPassword()));

} else {

props.put("mail.smtp.auth", "false");

return Session.getDefaultInstance(props);

}

}

/**

* 设置Java Mail属性

* @throws Exception

*/

private void setConfig() throws Exception {

this.configValid();

Session s = this.initSession();

message = new MimeMessage(s);

/* 发件人 */

Address[] fromMailArray = new Address[1];

fromMailArray[0] = new InternetAddress(c.getFromMail());

message.addFrom(fromMailArray);

if (c.getToMails() != null && c.getToMails().size() > 0) {

for (String mail : c.getToMails()) {

message.addRecipient(Message.RecipientType.TO, new InternetAddress(mail));

}

}

if (c.getCcMails() != null && c.getCcMails().size() > 0) {

for (String mail : c.getCcMails()) {

message.addRecipient(Message.RecipientType.CC, new InternetAddress(mail));

}

}

if (c.getToMails() != null && c.getToMails().size() > 0) {

for (String mail : c.getToMails()) {

message.addRecipient(Message.RecipientType.BCC, new InternetAddress(mail));

}

}

// 邮件标题

message.setSubject(c.getSubject());

/* 正文 */

MimeBodyPart bodyPart = new MimeBodyPart();

bodyPart.setContent(c.getContent(), "text/html;charset=gb2312");

/* 封装邮件各部分信息 */

Multipart multipart = new MimeMultipart();

multipart.addBodyPart(bodyPart);

message.setContent(multipart);

BodyPart attachmentPart = null;

DataSource ds = null;

if (c.getAttachments() != null && c.getAttachments().size() > 0) {

for (File f : c.getAttachments()) {

attachmentPart = new MimeBodyPart();

ds = new FileDataSource(f);

attachmentPart.setDataHandler(new DataHandler(ds));

attachmentPart.setFileName("=?GBK?B?" + new sun.misc.BASE64Encoder().encode(f.getName().getBytes()) + "?=");

multipart.addBodyPart(attachmentPart);

}

}

message.setContent(multipart);

}

/**

* 配置校验

* @throws Exception

*/

private void configValid() throws Exception {

if (c == null) {

throw new Exception("配置对象为空");

}

if (c.getSMTPMailHost() == null || c.getSMTPMailHost().length() == 0) {

throw new Exception("SMTP服务器为空");

}

if (c.getFromMail() == null && c.getFromMail().length() == 0) {

throw new Exception("发件人邮件为空");

}

if (c.getToMails() == null || c.getToMails().size() < 1) {

throw new Exception("收件人邮件为空");

}

if (c.getSubject() == null || c.getSubject().length() == 0) {

throw new Exception("邮件标题为空");

}

if (c.getContent() == null || c.getContent().length() == 0) {

throw new Exception("邮件内容为空");

}

}

/**

* 发送邮件

* @throws MessagingException

*/

public void send() throws MessagingException {

Transport.send(message);

}

/**

* 设置MimeMessage，暴露此对象以便于开发者自行设置个性化的属性

* @return

*/

public MimeMessage getMessage() {

return message;

}

/**

* 设置MimeMessage，暴露此对象以便于开发者自行设置个性化的属性

* @return

*/

public void setMessage(MimeMessage message) {

this.message = message;

}

}

提供一个简单的测试类

package No005_来一个工具类;

import java.io.File;

import javax.mail.internet.MimeMessage;

public class TestCall {

public static void main(String[] args) throws Exception {

/* 必需的信息 */

String SMTP_MAIL_HOST = "smtp.163.com"; // 此邮件服务器地址，自行去所属邮件查询

String EMAIL_USERNAME = "example@163.com";

String EMAIL_PASSWORD = "password";

String TO_EMAIL_ADDRESS_1 = "example@163.com";

String TO_EMAIL_ADDRESS_2 = "example@163.com";

/* 使用情况一，正常使用 */

/*

MailSenderConfig c = new MailSenderConfig(SMTP_MAIL_HOST,

"this is test mail for test java mail framework 3.", "this is content 3.", EMAIL_USERNAME);

c.setUsername(EMAIL_USERNAME);

c.setPassword(EMAIL_PASSWORD);

c.addToMail(TO_EMAIL_ADDRESS_1);

c.addToMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_1);

c.addAttachment(new File("d:/1.txt"));

MailSender ms = new MailSender(c);

ms.send();

System.out.println("sent...");

*/

/* 使用情况二，在更多情况下，工具类所作的设置并不满足需求，故将MimeMessage暴露并 */

MailSenderConfig c = new MailSenderConfig(SMTP_MAIL_HOST,

"this is test mail for test java mail framework 4.", "this is content 4.", EMAIL_USERNAME);

c.setUsername(EMAIL_USERNAME);

c.setPassword(EMAIL_PASSWORD);

c.addToMail(TO_EMAIL_ADDRESS_1);

c.addToMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_1);

c.addAttachment(new File("d:/1.txt"));

MailSender ms = new MailSender(c);

MimeMessage message = ms.getMessage();

message.setContent("this is the replaced content by MimeMessage 4.", "text/html;charset=utf-8");

ms.setMessage(message);

ms.send();

System.out.println("sent...");

}

}

升级下工具类

在实际使用中，发现在批量发送邮件情况下，工具类的支持不好，比如发送100封邮件，按照上述工具类的逻辑，每发送一封邮件就建立一个连接，那么，100封不就100次了吗？这样严重浪费啊。

于是，针对此点作些升级：

认证器是一定的，沿用，略。

配置类

import java.util.ArrayList;

import java.util.List;

public class MailSenderConfig {

private String SMTPMailHost; // 支持SMTP协议的邮件服务器地址

/* 用于登录邮件服务器 */

private String username;

private String password;

private String subject; // 标题

private String content; // 内容

private String fromMail; // 显示从此邮箱发出邮件

private List toMails; // 收件人

private List ccMails; // 抄送人

private List bccMails; // 秘密抄送人

private List attachments; // 附件

private String contentType = "text/html;charset=utf-8";

/**

* 构造器

* @param sMTPMailHost SMTP服务器

* @param subject 标题

* @param content 内容(默认以“text/html;charset=utf-8”形式发送)

* @param fromMail 发送人地址

*/

public MailSenderConfig(String sMTPMailHost, String subject,

String content, String fromMail) {

super();

SMTPMailHost = sMTPMailHost;

this.subject = subject;

this.content = content;

this.fromMail = fromMail;

}

/**

* 构造器

* @param sMTPMailHost SMTP服务器

* @param username 邮件服务器用户名

* @param password 邮件服务器密码

* @param subject 标题

* @param content 内容(默认以“text/html;charset=utf-8”形式发送)

* @param fromMail 发送人地址

*/

public MailSenderConfig(String sMTPMailHost, String username,

String password, String subject, String content, String fromMail) {

super();

SMTPMailHost = sMTPMailHost;

this.username = username;

this.password = password;

this.subject = subject;

this.content = content;

this.fromMail = fromMail;

}

public void addToMail (String mail) {

if (this.toMails == null) {

this.toMails = new ArrayList();

}

this.toMails.add(mail);

}

public void addCcMail (String mail) {

if (this.ccMails == null) {

this.ccMails = new ArrayList();

}

this.ccMails.add(mail);

}

public void addBccMail (String mail) {

if (this.bccMails == null) {

this.bccMails = new ArrayList();

}

this.bccMails.add(mail);

}

public void addAttachment (Attachment a) {

if (this.attachments == null) {

this.attachments = new ArrayList();

}

this.attachments.add(a);

}

/*

* Getter and Setter

*/

public String getSMTPMailHost() {

return SMTPMailHost;

}

public void setSMTPMailHost(String sMTPMailHost) {

SMTPMailHost = sMTPMailHost;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String getFromMail() {

return fromMail;

}

public void setFromMail(String fromMail) {

this.fromMail = fromMail;

}

public List getToMails() {

return toMails;

}

public void setToMails(List toMails) {

this.toMails = toMails;

}

public List getCcMails() {

return ccMails;

}

public void setCcMails(List ccMails) {

this.ccMails = ccMails;

}

public List getBccMails() {

return bccMails;

}

public void setBccMails(List bccMails) {

this.bccMails = bccMails;

}

public List getAttachments() {

return attachments;

}

public void setAttachments(List attachments) {

this.attachments = attachments;

}

public String getSubject() {

return subject;

}

public void setSubject(String subject) {

this.subject = subject;

}

public String getContent() {

return content;

}

public void setContent(String content) {

this.content = content;

}

public String getContentType() {

return contentType;

}

public void setContentType(String contentType) {

this.contentType = contentType;

}

}

附件实体类

import java.io.File;

/**

* 邮件附件实体类

*/

public class Attachment {

private File file;

private String filename;

public File getFile() {

return file;

}

public void setFile(File file) {

this.file = file;

}

public String getFilename() {

if (filename == null || filename.trim().length() == 0) {

return file.getName();

}

return filename;

}

public void setFilename(String filename) {

this.filename = filename;

}

public Attachment(File file, String filename) {

super();

this.file = file;

this.filename = filename;

}

public Attachment(File file) {

super();

this.file = file;

}

}

抽象发送类

import java.util.Properties;

import javax.mail.Session;

public abstract class AbstractSessionMailSender {

protected Session session;

/**

* 初始化Session

* @return

*/

public static Session initSession(MailSenderConfig c) {

Properties props = new Properties();

if (c.getSMTPMailHost() != null && c.getSMTPMailHost().length() > 0) {

props.put("mail.smtp.host", c.getSMTPMailHost());

}

if (c.getUsername() != null && c.getUsername().length() > 0 &&

c.getPassword() != null && c.getPassword().length() > 0) {

props.put("mail.smtp.auth", "true");

return Session.getDefaultInstance(props, new SimpleAuthenticator(c.getUsername(), c.getPassword()));

} else {

props.put("mail.smtp.auth", "false");

return Session.getDefaultInstance(props);

}

}

/**

* 暴露Getter、Setter提供Session的可设置性，以支持批量发送邮件/发送多次邮件时，可缓存Session

* @return

*/

public Session getSession() {

return session;

}

public void setSession(Session session) {

this.session = session;

}

}

发送类

import javax.activation.DataHandler;

import javax.activation.DataSource;

import javax.activation.FileDataSource;

import javax.mail.Address;

import javax.mail.BodyPart;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Multipart;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

import javax.mail.internet.MimeUtility;

public class MailSender extends AbstractSessionMailSender {

private MailSenderConfig c;

private MimeMessage message;

public MailSender(MailSenderConfig config) throws Exception {

super();

this.c = config;

this.setConfig();

}

public MailSender(MailSenderConfig config, Session session) throws Exception {

super();

this.c = config;

this.setConfig();

super.setSession(session);

}

/**

* 发送邮件

* @throws MessagingException

*/

public void send() throws MessagingException {

Transport.send(message);

}

/**

* 获取MimeMessage，暴露此对象以便于开发者自行设置个性化的属性(此工具类不支持的方法可由开发人员自行设置，设置完毕设置回来)

* @return

*/

public MimeMessage getMessage() {

return message;

}

/**

* 设置MimeMessage，暴露此对象以便于开发者自行设置个性化的属性(此工具类不支持的方法可由开发人员自行设置，设置完毕设置回来)

* @return

*/

public void setMessage(MimeMessage message) {

this.message = message;

}

/**

* 设置Java Mail属性

* @throws Exception

*/

private void setConfig() throws Exception {

this.configValid();

if (session == null) {

session = initSession(c);

}

message = new MimeMessage(session);

/* 发件人 */

Address[] fromMailArray = new Address[1];

fromMailArray[0] = new InternetAddress(c.getFromMail());

message.addFrom(fromMailArray);

if (c.getToMails() != null && c.getToMails().size() > 0) {

for (String mail : c.getToMails()) {

message.addRecipient(Message.RecipientType.TO, new InternetAddress(mail));

}

}

if (c.getCcMails() != null && c.getCcMails().size() > 0) {

for (String mail : c.getCcMails()) {

message.addRecipient(Message.RecipientType.CC, new InternetAddress(mail));

}

}

if (c.getToMails() != null && c.getToMails().size() > 0) {

for (String mail : c.getToMails()) {

message.addRecipient(Message.RecipientType.BCC, new InternetAddress(mail));

}

}

// 邮件标题

message.setSubject(c.getSubject());

/* 正文 */

MimeBodyPart bodyPart = new MimeBodyPart();

bodyPart.setContent(c.getContent(), c.getContentType());

/* 封装邮件各部分信息 */

Multipart multipart = new MimeMultipart();

multipart.addBodyPart(bodyPart);

message.setContent(multipart);

/* 附件 */

BodyPart attachmentPart = null;

DataSource ds = null;

if (c.getAttachments() != null && c.getAttachments().size() > 0) {

for (Attachment a : c.getAttachments()) {

attachmentPart = new MimeBodyPart();

ds = new FileDataSource(a.getFile());

attachmentPart.setDataHandler(new DataHandler(ds));

attachmentPart.setFileName(MimeUtility.encodeText(a.getFilename()));

multipart.addBodyPart(attachmentPart);

}

}

message.setContent(multipart);

}

/**

* 配置校验

* @throws Exception

*/

private void configValid() throws Exception {

if (c == null) {

throw new Exception("配置对象为空");

}

if (c.getSMTPMailHost() == null || c.getSMTPMailHost().length() == 0) {

throw new Exception("SMTP服务器为空");

}

if (c.getFromMail() == null && c.getFromMail().length() == 0) {

throw new Exception("发件人邮件为空");

}

if (c.getToMails() == null || c.getToMails().size() < 1) {

throw new Exception("收件人邮件为空");

}

if (c.getSubject() == null || c.getSubject().length() == 0) {

throw new Exception("邮件标题为空");

}

if (c.getContent() == null || c.getContent().length() == 0) {

throw new Exception("邮件内容为空");

}

}

}

一个Junit的测试类

import java.io.File;

import javax.mail.Session;

import javax.mail.internet.MimeMessage;

import org.junit.Test;

public class ReadMe {

/* 必需的信息 */

String SMTP_MAIL_HOST = "smtp.163.com"; // 此邮件服务器地址，自行去所属邮件服务器描述页查询

String EMAIL_USERNAME = "example@163.com";

String EMAIL_PASSWORD = "password";

String TO_EMAIL_ADDRESS_1 = "example@163.com";

/* 选填的信息 */

String TO_EMAIL_ADDRESS_2 = "example@163.com";

@Test

public void case1() throws Exception {

/* 使用情况一，正常使用 */

MailSenderConfig c = new MailSenderConfig(SMTP_MAIL_HOST,

"this is a mail for test java mail framework in case1.", "this is content.", EMAIL_USERNAME);

c.setUsername(EMAIL_USERNAME);

c.setPassword(EMAIL_PASSWORD);

c.addToMail(TO_EMAIL_ADDRESS_1);

c.addToMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_1);

c.addAttachment(new Attachment(new File("d:/1.txt")));

MailSender ms = new MailSender(c);

ms.send();

System.out.println("sent...");

}

@Test

public void case2() throws Exception {

/* 使用情况二，在更多情况下，工具类所作的设置并不满足需求，故将MimeMessage暴露以便于开发者自行设置个性化的属性 */

MailSenderConfig c = new MailSenderConfig(SMTP_MAIL_HOST,

"this is a mail for test java mail framework in case2.", "this is content.", EMAIL_USERNAME);

c.setUsername(EMAIL_USERNAME);

c.setPassword(EMAIL_PASSWORD);

c.addToMail(TO_EMAIL_ADDRESS_1);

c.addToMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_1);

c.addAttachment(new Attachment(new File("d:/1.txt")));

MailSender ms = new MailSender(c);

MimeMessage message = ms.getMessage();

message.setContent("this is the replaced content by MimeMessage in case2.", "text/html;charset=utf-8");

ms.setMessage(message);

ms.send();

System.out.println("sent...");

}

@Test

public void case3() throws Exception {

/* 使用情况三，多次发送邮件，可缓存Session，使多次发送邮件均共享此Session，以减少重复创建Session

* 同时需注意缓存的Session的时效性

*/

MailSenderConfig c = new MailSenderConfig(SMTP_MAIL_HOST,

"this is the first mail for test java mail framework to share session in case3.", "this is content.", EMAIL_USERNAME);

c.setUsername(EMAIL_USERNAME);

c.setPassword(EMAIL_PASSWORD);

c.addToMail(TO_EMAIL_ADDRESS_1);

c.addToMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_2);

c.addCcMail(TO_EMAIL_ADDRESS_1);

c.addAttachment(new Attachment(new File("d:/1.txt")));

Session session = MailSender.initSession(c);

MailSender ms = new MailSender(c, session);

ms.send();

c.setSubject("this is the second mail for test java mail framework to share session in case3.");

c.setContent("this is content 2.");

ms = new MailSender(c, session);

ms.send();

System.out.println("sent...");

}

}

总结

目前，我遇到的需求就是这么多，如日后遇见其他常见的需求并有时间，会进一步添加。

以上所述是小编给大家介绍的Java发送邮件遇到的常见需求汇总的全部叙述，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！