Java發送郵件遇到的常見需求匯總

基於SMTP發送一個簡單的郵件

首先，需要一個認證器：

 package No001_基於SMTP的文本郵件;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);}}

然後，書寫簡單的發送郵件程序：

 package No001_基於SMTP的文本郵件;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"; // 此郵件服務器地址，自行去所屬郵件查詢String EMAIL_USERNAME = "[email protected]";String EMAIL_PASSWORD = "mypassword";String TO_EMAIL_ADDRESS = "[email protected]";/* 服務器信息*/Properties props = new Properties();props.put("mail.smtp.host", SMTP_MAIL_HOST);props.put("mail.smtp.auth", "true");/* 創建Session */Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));/* 郵件信息*/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)");// 發送Transport.send(message);System.out.println("不是特別倒霉，你可以去查收郵件了。 ");}}

各種收件人、抄送人、秘密抄送人，怎麼辦

認證器沿用，略。

其實就是設置、追加多個收件人、抄送人、秘密抄送人：

 package No002_各種發件人收件人抄送人怎麼辦;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"; // 此郵件服務器地址，自行去所屬郵件查詢String EMAIL_USERNAME = "[email protected]";String EMAIL_PASSWORD = "mypassword";String TO_EMAIL_ADDRESS_1 = "[email protected]";String CC_EMAIL_ADDRESS_1 = "[email protected]";String BCC_EMAIL_ADDRESS_1 = "[email protected]";/* 服務器信息*/Properties props = new Properties();props.put("mail.smtp.host", SMTP_MAIL_HOST);props.put("mail.smtp.auth", "true");/* 創建Session */Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));/* 發件人*/Address[] senderArray = new Address[1];senderArray[0] = new InternetAddress("[email protected]", "Nick Huang");/* 郵件信息*/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("我是一封學習Java Mail的郵件");message.setText("我是一封學習Java Mail的郵件的內容，請郵件過濾器高抬貴手。 ");// 發送Transport.send(message);System.out.println("不是特別倒霉，你可以去查收郵件了。");}}

發送附件怎麼辦

認證器沿用，略。

發送附件demo：

 package No003_發送附件怎麼辦;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"; // 此郵件服務器地址，自行去所屬郵件查詢String EMAIL_USERNAME = "[email protected]";String EMAIL_PASSWORD = "password";String TO_EMAIL_ADDRESS_1 = "[email protected]";/* 服務器信息*/Properties props = new Properties();props.put("mail.smtp.host", SMTP_MAIL_HOST);props.put("mail.smtp.auth", "true");/* 創建Session */Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));/* 發件人*/Address[] senderArray = new Address[1];senderArray[0] = new InternetAddress(EMAIL_USERNAME);/* 郵件信息*/MimeMessage message = new MimeMessage(session);message.addFrom(senderArray);message.addRecipient(Message.RecipientType.TO, new InternetAddress(TO_EMAIL_ADDRESS_1));message.setSubject("我是一封學習Java Mail的郵件");BodyPart bodyPart = new MimeBodyPart();bodyPart.setText("這是一封學習Java Mail的郵件的內容，請郵件過濾器高抬貴手。 ");/* 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:/文件貳.txt"));attachmentPart2.setDataHandler(new DataHandler(source));attachmentPart2.setFileName("=?GBK?B?" + new sun.misc.BASE64Encoder().encode("文件貳.txt".getBytes()) + "?=");Multipart multipart = new MimeMultipart();multipart.addBodyPart(bodyPart);multipart.addBodyPart(attachmentPart1);multipart.addBodyPart(attachmentPart2);message.setContent(multipart);// 發送Transport.send(message);System.out.println("不是特別倒霉，你可以去查收郵件了。");}}

還有，發送HTML郵件

認證器沿用，略。

其實就是告訴收件客戶端用HTML解析渲染：

 package No004_發送HTML郵件;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"; // 此郵件服務器地址，自行去所屬郵件查詢String EMAIL_USERNAME = "[email protected]";String EMAIL_PASSWORD = "password";String TO_EMAIL_ADDRESS_1 = "[email protected]";/* 服務器信息*/Properties props = new Properties();props.put("mail.smtp.host", SMTP_MAIL_HOST);props.put("mail.smtp.auth", "true");/* 創建Session */Session session = Session.getDefaultInstance(props, new SimpleAuthenticator(EMAIL_USERNAME, EMAIL_PASSWORD));/* 發件人*/Address[] senderArray = new Address[1];senderArray[0] = new InternetAddress(EMAIL_USERNAME);/* 郵件信息*/MimeMessage message = new MimeMessage(session);message.addFrom(senderArray);message.addRecipient(Message.RecipientType.TO, new InternetAddress(TO_EMAIL_ADDRESS_1));message.setSubject("如何發送HTML的郵件");/* 正文*/MimeBodyPart bodyPart = new MimeBodyPart();bodyPart.setContent("<h1>loving you...</h2>", "text/html;charset=gb2312");/* 封裝郵件各部分信息*/Multipart multipart = new MimeMultipart();multipart.addBodyPart(bodyPart);message.setContent(multipart);// 發送Transport.send(message);System.out.println("不是特別倒霉，你可以去查收郵件了。 ");}}

要不，來個工具類?

認證器是一定的，沿用，略。

由於需要設置的屬性多且繁雜，用個自己人簡單易用的屬性命名，所以來一個配置類

package No005_來一個工具類;import java.io.File;import java.util.ArrayList;import java.util.List;public class MailSenderConfig {private String SMTPMailHost; // 支持SMTP協議的郵件服務器地址/* 用於登錄郵件服務器*/private String username;private String password;private String subject; // 標題private String content; // 內容private String fromMail; // 顯示從此郵箱發出郵件private List<String> toMails; // 收件人private List<String> ccMails; // 抄送人private List<String> bccMails; // 秘密抄送人private List<File> 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<String> getToMails() {return toMails;}public void setToMails(List<String> toMails) {this.toMails = toMails;}public List<String> getCcMails() {return ccMails;}public void setCcMails(List<String> ccMails) {this.ccMails = ccMails;}public List<String> getBccMails() {return bccMails;}public void setBccMails(List<String> bccMails) {this.bccMails = bccMails;}public List<File> getAttachments() {return attachments;}public void setAttachments(List<File> 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<String>();}this.toMails.add(mail);}public void addCcMail (String mail) {if (this.ccMails == null) {this.ccMails = new ArrayList<String>();}this.ccMails.add(mail);}public void addBccMail (String mail) {if (this.bccMails == null) {this.bccMails = new ArrayList<String>();}this.bccMails.add(mail);}public void addAttachment (File f) {if (this.attachments == null) {this.attachments = new ArrayList<File>();}this.attachments.add(f);}}

最後，就是工具類的部分，主要負責幾個事情：按照Java Mail規則作些初始化動作、將自定義的屬性配置類翻譯並以Java Mail規則設置、發送郵件。

還有，需要提下的是，因為工具類所提供的代替設置的屬性有限，更多的情況可能不滿足需要，所以暴露出MimeMessage，在不滿足需求的情況開發者可自行加工配置，而其他部分仍可沿用工具類。

 package No005_來一個工具類;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_各種發件人收件人抄送人怎麼辦.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);}}/*** 設置Java Mail屬性* @throws Exception*/private void setConfig() throws Exception {this.configValid();Session s = this.initSession();message = new MimeMessage(s);/* 發件人*/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));}}// 郵件標題message.setSubject(c.getSubject());/* 正文*/MimeBodyPart bodyPart = new MimeBodyPart();bodyPart.setContent(c.getContent(), "text/html;charset=gb2312");/* 封裝郵件各部分信息*/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);}/*** 配置校驗* @throws Exception*/private void configValid() throws Exception {if (c == null) {throw new Exception("配置對象為空");}if (c.getSMTPMailHost() == null || c.getSMTPMailHost().length() == 0) {throw new Exception("SMTP服務器為空");}if (c.getFromMail() == null && c.getFromMail().length() == 0) {throw new Exception("發件人郵件為空");}if (c.getToMails() == null || c.getToMails().size() < 1) {throw new Exception("收件人郵件為空");}if (c.getSubject() == null || c.getSubject().length() == 0) {throw new Exception("郵件標題為空");}if (c.getContent() == null || c.getContent().length() == 0) {throw new Exception("郵件內容為空");}}/*** 發送郵件* @throws MessagingException*/public void send() throws MessagingException {Transport.send(message);}/*** 設置MimeMessage，暴露此對像以便於開發者自行設置個性化的屬性* @return*/public MimeMessage getMessage() {return message;}/*** 設置MimeMessage，暴露此對像以便於開發者自行設置個性化的屬性* @return*/public void setMessage(MimeMessage message) {this.message = message;}} 提供一個簡單的測試類package No005_來一個工具類;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"; // 此郵件服務器地址，自行去所屬郵件查詢String EMAIL_USERNAME = "[email protected]";String EMAIL_PASSWORD = "password";String TO_EMAIL_ADDRESS_1 = "[email protected]";String TO_EMAIL_ADDRESS_2 = "[email protected]";/* 使用情況一，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...");*//* 使用情況二，在更多情況下，工具類所作的設置並不滿足需求，故將MimeMessage暴露並*/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...");}}

升級下工具類

在實際使用中，發現在批量發送郵件情況下，工具類的支持不好，比如發送100封郵件，按照上述工具類的邏輯，每發送一封郵件就建立一個連接，那麼，100封不就100次了嗎？這樣嚴重浪費啊。

於是，針對此點作些升級：

認證器是一定的，沿用，略。

配置類

import java.util.ArrayList;import java.util.List;public class MailSenderConfig {private String SMTPMailHost; // 支持SMTP協議的郵件服務器地址/* 用於登錄郵件服務器*/private String username;private String password;private String subject; // 標題private String content; // 內容private String fromMail; // 顯示從此郵箱發出郵件private List<String> toMails; // 收件人private List<String> ccMails; // 抄送人private List<String> bccMails; // 秘密抄送人private List<Attachment> attachments; // 附件private String contentType = "text/html;charset=utf-8";/*** 構造器* @param sMTPMailHost SMTP服務器* @param subject 標題* @param content 內容（默認以“text/html;charset=utf-8”形式發送）* @param fromMail 發送人地址*/public MailSenderConfig(String sMTPMailHost, String subject,String content, String fromMail) {super();SMTPMailHost = sMTPMailHost;this.subject = subject;this.content = content;this.fromMail = fromMail;}/*** 構造器* @param sMTPMailHost SMTP服務器* @param username 郵件服務器用戶名* @param password 郵件服務器密碼* @param subject 標題* @param content 內容（默認以“text/html;charset=utf-8”形式發送）* @param fromMail 發送人地址*/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<String>();}this.toMails.add(mail);}public void addCcMail (String mail) {if (this.ccMails == null) {this.ccMails = new ArrayList<String>();}this.ccMails.add(mail);}public void addBccMail (String mail) {if (this.bccMails == null) {this.bccMails = new ArrayList<String>();}this.bccMails.add(mail);}public void addAttachment (Attachment a) {if (this.attachments == null) {this.attachments = new ArrayList<Attachment>();}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<String> getToMails() {return toMails;}public void setToMails(List<String> toMails) {this.toMails = toMails;}public List<String> getCcMails() {return ccMails;}public void setCcMails(List<String> ccMails) {this.ccMails = ccMails;}public List<String> getBccMails() {return bccMails;}public void setBccMails(List<String> bccMails) {this.bccMails = bccMails;}public List<Attachment> getAttachments() {return attachments;}public void setAttachments(List<Attachment> 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;}} 附件實體類import java.io.File;/*** 郵件附件實體類*/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;}} 抽象發送類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的可設置性，以支持批量發送郵件/發送多次郵件時，可緩存Session* @return*/public Session getSession() {return session;}public void setSession(Session session) {this.session = session;}}

發送類

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);}/*** 發送郵件* @throws MessagingException*/public void send() throws MessagingException {Transport.send(message);}/*** 獲取MimeMessage，暴露此對像以便於開發者自行設置個性化的屬性（此工具類不支持的方法可由開發人員自行設置，設置完畢設置回來）* @return*/public MimeMessage getMessage() {return message;}/*** 設置MimeMessage，暴露此對像以便於開發者自行設置個性化的屬性（此工具類不支持的方法可由開發人員自行設置，設置完畢設置回來）* @return*/public void setMessage(MimeMessage message) {this.message = message;}/*** 設置Java Mail屬性* @throws Exception*/private void setConfig() throws Exception {this.configValid();if (session == null) {session = initSession(c);}message = new MimeMessage(session);/* 發件人*/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));}}// 郵件標題message.setSubject(c.getSubject());/* 正文*/MimeBodyPart bodyPart = new MimeBodyPart();bodyPart.setContent(c.getContent(), c.getContentType());/* 封裝郵件各部分信息*/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);}/*** 配置校驗* @throws Exception*/private void configValid() throws Exception {if (c == null) {throw new Exception("配置對象為空");}if (c.getSMTPMailHost() == null || c.getSMTPMailHost().length() == 0) {throw new Exception("SMTP服務器為空");}if (c.getFromMail() == null && c.getFromMail().length() == 0) {throw new Exception("發件人郵件為空");}if (c.getToMails() == null || c.getToMails().size() < 1) {throw new Exception("收件人郵件為空");}if (c.getSubject() == null || c.getSubject().length() == 0) {throw new Exception("郵件標題為空");}if (c.getContent() == null || c.getContent().length() == 0) {throw new Exception("郵件內容為空");}}}一個Junit的測試類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"; // 此郵件服務器地址，自行去所屬郵件服務器描述頁查詢String EMAIL_USERNAME = "[email protected]";String EMAIL_PASSWORD = "password";String TO_EMAIL_ADDRESS_1 = "[email protected]";/* 選填的信息*/String TO_EMAIL_ADDRESS_2 = "[email protected]";@Testpublic void case1() throws Exception {/* 使用情況一，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...");}@Testpublic void case2() throws Exception {/* 使用情況二，在更多情況下，工具類所作的設置並不滿足需求，故將MimeMessage暴露以便於開發者自行設置個性化的屬性*/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...");}@Testpublic void case3() throws Exception {/* 使用情況三，多次發送郵件，可緩存Session，使多次發送郵件均共享此Session，以減少重複創建Session* 同時需注意緩存的Session的時效性*/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...");}}

總結

目前，我遇到的需求就是這麼多，如日後遇見其他常見的需求並有時間，會進一步添加。

以上所述是小編給大家介紹的Java發送郵件遇到的常見需求匯總的全部敘述，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對武林網網站的支持！