依赖javax.mail.jar,地址：https://java.net/projects/javamail/pages/Home
完整示例代码如下：
package com.jadic.utils; import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Properties;
import java.util.regex.Pattern; import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
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 javax.mail.internet.MimeUtility; /**
* 简易邮件发送<br>
* 需提供邮件服务提供商的smtp地址、邮箱账号、密码收件人邮箱<br><br>
* 使用方式:<br>
* 1.实例化JMail对象，适合多次利用相同账号信息发送到相同收件人<br>
* JMail jMail = new JMail(...);<br>
* jMail.sendMail(subject, content);<br>
* 2.直接调用JMail静态方法发送，需每次都将smtp、账号、收件人、内容提供<br>
* JMail.sendMail(smtp, fromUserAddress, fromUserPass,recipients,subject,content);
* @author Jadic
* @created 2014-5-13
*/
public class JMail { private String smtpHost;// smtp服务器地址
private String userName;// 发送方账号
private String userPass;// 发送方密码
private List<String> recipientList;// 收件人列表 private Message msg;
private boolean isMailConfigInited; private final static String VALID_EMAIL_REGEX = "^[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}$";
private final static Pattern VALID_EMAIL_PATTERN = Pattern.compile(VALID_EMAIL_REGEX, Pattern.CASE_INSENSITIVE); private final static String SEND_MAIL_OK = "OK";
private final static String SEND_MAIL_NO_RECIPIENTS = "Fail:no valid recipient set"; private JMail(String smtp, String fromUserAddress, String fromUserPass) {
this.smtpHost = smtp;
this.userName = fromUserAddress;
this.userPass = fromUserPass; recipientList = new ArrayList<String>();
isMailConfigInited = false;
} /**
* @param smtp smtp服务地址
* @param fromUserAddress 发件人邮箱账号
* @param fromUserPass 发件人邮箱密码
* @param recipient 收件人地址(列表),支持多个收件人以";"分割
*/
public JMail(String smtp, String fromUserAddress, String fromUserPass, String recipient) {
this(smtp, fromUserAddress, fromUserPass);
String[] recs = recipient.split(";");
for (String rec : recs) {
if (isValidEmail(rec)) {
this.recipientList.add(rec);
}
}
} /**
* @param smtp smtp服务地址
* @param fromUserAddress 发件人邮箱账号
* @param fromUserPass 发件人邮箱密码
* @param recipients 收件人地址列表
*/
public JMail(String smtp, String fromUserAddress, String fromUserPass, String... recipients) {
this(smtp, fromUserAddress, fromUserPass);
for (String recipient : recipients) {
if (isValidEmail(recipient)) {
this.recipientList.add(recipient);
}
}
} /**
* @param smtp smtp服务地址
* @param fromUserAddress 发件人邮箱账号
* @param fromUserPass 发件人邮箱密码
* @param recipientList 收件人地址列表
*/
public JMail(String smtp, String fromUserAddress, String fromUserPass, List<String> recipientList) {
this(smtp, fromUserAddress, fromUserPass);
for (String recipient : recipientList) {
if (isValidEmail(recipient)) {
this.recipientList.add(recipient);
}
}
} /**
* 发送邮件,主题默认"default"
* @param content 发送内容
* @return "ok" 成功发送，否则返回失败提示
*/
public String sendMail(String content) {
return sendMail("default", content);
} /**
* @param subject 邮件主题
* @param content 邮件内容
* @return "ok" 成功发送，否则返回失败提示
*/
public String sendMail(String subject, String content) {
if (this.recipientList.size() <= 0) {
return SEND_MAIL_NO_RECIPIENTS;
} if (!isMailConfigInited) {
try {
initMailConfig();
} catch (AddressException e) {
return "fail: address err[" + e.getMessage().trim() + "]";
} catch (MessagingException e) {
return "fail: MessagingErr[" + e.getMessage().trim() + "]";
}
}
try {
msg.setSentDate(new Date());
} catch (MessagingException e) {
e.printStackTrace();
}
try {
msg.setSubject(MimeUtility.encodeText(subject, "gbk", "B")); MimeMultipart mmp = new MimeMultipart();
MimeBodyPart mbp = new MimeBodyPart();
mbp.setContent(content, "text/plain;charset=gbk");
mmp.addBodyPart(mbp);
msg.setContent(mmp);
Transport.send(msg);
} catch (UnsupportedEncodingException e) {
return "fail: unsupported encoding[" + e.getMessage().trim() + "]";
} catch (MessagingException e) {
return "fail: MessagingErr[" + e.getMessage().trim() + "]";
} return SEND_MAIL_OK;
} private void initMailConfig() throws AddressException, MessagingException {
Properties props = new Properties();
// 发送服务器需要身份验证
props.setProperty("mail.smtp.auth", "true");
// 设置邮件服务器主机名
props.setProperty("mail.host", smtpHost);
// 发送邮件协议名称
props.setProperty("mail.transport.protocol", "smtp"); Session session = Session.getInstance(props, new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, userPass);
}
});
msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(userName));
msg.addRecipients(Message.RecipientType.TO, getRecipients());
isMailConfigInited = true;
} /**
*
* @param smtp smtp地址
* @param fromUserAddress 发件人账号
* @param fromUserPass 发件人账号密码
* @param recipients 收件人(列表),多个收件人以";"分割
* @param subject 邮件主题
* @param content 邮件内容
* @return "ok" 成功发送，否则返回失败提示
*/
public static String sendMail(String smtp, String fromUserAddress, String fromUserPass, String recipients, String subject,
String content) {
final String userName = fromUserAddress;
final String userPass = fromUserPass;
Properties props = new Properties();
// 发送服务器需要身份验证
props.setProperty("mail.smtp.auth", "true");
// 设置邮件服务器主机名
props.setProperty("mail.host", smtp);
// 发送邮件协议名称
props.setProperty("mail.transport.protocol", "smtp"); Session session = Session.getInstance(props, new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, userPass);
}
});
Message msg = new MimeMessage(session);
try {
msg.setFrom(new InternetAddress(userName));
String[] recipientAry = recipients.split(";");
InternetAddress[] recipientsAddress = new InternetAddress[recipientAry.length];
for (int i = 0; i < recipientAry.length; i++) {
if (isValidEmail(recipientAry[i])) {
recipientsAddress[i] = new InternetAddress(recipientAry[i]);
}
}
msg.addRecipients(Message.RecipientType.TO, recipientsAddress);
msg.setSentDate(new Date());
msg.setSubject(MimeUtility.encodeText(subject, "gbk", "B")); MimeMultipart mmp = new MimeMultipart();
MimeBodyPart mbp = new MimeBodyPart();
mbp.setContent(content, "text/plain;charset=gbk");
mmp.addBodyPart(mbp);
msg.setContent(mmp);
Transport.send(msg);
} catch (UnsupportedEncodingException e) {
return "fail: unsupported encoding[" + e.getMessage().trim() + "]";
} catch (MessagingException e) {
return "fail: MessagingErr[" + e.getMessage().trim() + "]";
} return SEND_MAIL_OK;
} private InternetAddress[] getRecipients() throws AddressException {
if (recipientList.size() > 0) {
InternetAddress[] recipients = new InternetAddress[recipientList.size()];
for (int i = 0; i < recipients.length; i++) {
recipients[i] = new InternetAddress(this.recipientList.get(i));
}
return recipients;
}
return new InternetAddress[0];
} private static boolean isValidEmail(String email) {
return email != null && VALID_EMAIL_PATTERN.matcher(email).find();
}
}