java发送Email代码实现

非常感谢http://www.codefans.net/articles/209.shtml博文作者。

代码非常简单，就不做过多解释。

首先需要导入mail.jar，本例子使用的jar包下载地址：http://download.csdn.net/detail/harderxin/4451541

直接上代码！

package org.dyb.email;

import java.util.Properties;

import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
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;

public class Mail {

private MimeMessage mimeMsg;
private Session session;
private Properties props;
private String username;
private String password;
private Multipart mp;

public Mail() {
}

public Mail(String smtp) {
setSmtpHost(smtp);
createMimeMessage();
}

private void setSmtpHost(String smtp) {
System.out.println("设置系统属性：mail.smtp.host  " + smtp);
if (null == props) {
props = System.getProperties();
}
props.put("mail.smtp.host", smtp);
}

private boolean createMimeMessage() {
try {
System.out.println("准备获取邮件会话对象！");
session = Session.getDefaultInstance(props, null);
} catch (Exception e) {
System.out.println("获取邮件会话错误！" + e);
return false;
}
System.out.println("准备创建MIME邮件对象！");
try {
mimeMsg = new MimeMessage(session);
mp = new MimeMultipart();
return true;
} catch (Exception e) {
System.out.println("创建MIME邮件对象失败！" + e);
return false;
}
}

/**
* 定义SMTP是否需要验证
*/
public void setNeedAuth(boolean need) {
System.out.println("设置smtp身份认证：mail.smtp.auth = " + need);
if (null == props) {
props = System.getProperties();
}
if (need)
props.put("mail.smtp.auth", "true");
else
props.put("mail.smtp.auth", "false");
}

public void setNameAndPassword(String username, String password) {
this.username = username;
this.password = password;
}

/**
* 定义邮件主题
*
* @return
*/
public boolean setSubject(String mailSubject) {
System.out.println("定义邮件主题！");
try {
mimeMsg.setSubject(mailSubject);
return true;
} catch (Exception e) {
System.err.println("定义邮件主题发生错误！" + e);
return false;
}
}

public boolean setBody(String mailBody) {
try {
BodyPart bp = new MimeBodyPart();
bp.setContent("" + mailBody, "text/html;charset=GBK");
mp.addBodyPart(bp);
return true;
} catch (Exception e) {
return false;
}
}

/**
* 设置发信人
*
* @return
*/
public boolean setFrom(String from) {
System.out.println("设置发信人！");
try {
mimeMsg.setFrom(new InternetAddress(from));
return true;
} catch (Exception e) {
return false;
}
}

/**
* 定义收信人
*
* @param to
* @return
*/
public boolean setTo(String to) {
if (to == null) {
System.out.println("没有定义收信人！");
return false;
}
System.out.println("定义收信人！");
try {
mimeMsg.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(to));
return true;
} catch (Exception e) {
return false;
}
}

/**
* 定义抄送人
*
* @param copyto
* @return
*/
public boolean setCopyTo(String copyto) {
if (copyto == null)
return false;
try {
mimeMsg.setRecipients(Message.RecipientType.CC,
(Address[]) InternetAddress.parse(copyto));
return true;
} catch (Exception e) {
return false;
}
}

public boolean sendOut() {
try {
mimeMsg.setContent(mp);
mimeMsg.saveChanges();
System.out.println("邮件发送中....");
Session mailSession = Session.getInstance(props, null);
Transport transport = mailSession.getTransport("smtp");
transport.connect((String) props.get("mail.smtp.host"), username,
password);
transport.sendMessage(mimeMsg,
mimeMsg.getRecipients(Message.RecipientType.TO));
System.out.println("发送成功！");
transport.close();
return true;
} catch (Exception e) {
System.err.println("邮件失败！" + e);
return false;
}
}

/**
* 调用sendOut方法完成发送
*
* @param smtp
* @param from
* @param to
* @param copyto
* @param subject
* @param content
* @param username
* @param password
* @return
*/
public static boolean sendAndCc(String smtp, String from, String to,
String copyto, String subject, String content, String username,
String password) {
Mail theMail = new Mail(smtp);
theMail.setNeedAuth(true); // 验证
if (!theMail.setSubject(subject))
return false;
if (!theMail.setBody(content))
return false;
if (!theMail.setTo(to))
return false;
if (!theMail.setCopyTo(copyto))
return false;
if (!theMail.setFrom(from))
return false;
theMail.setNameAndPassword(username, password);
if (!theMail.sendOut())
return false;
return true;
}

public static void main(String[] args) {
String smtp = "smtp.163.com";// smtp服务器
String from = "xxxxx@163.com";// 邮件显示名称
String to = "1111111@qq.com";// 收件人的邮件地址，必须是真实地址
String copyto = "";// 抄送人邮件地址
String subject = "测试邮件";// 邮件标题
String content = "你好！";// 邮件内容
String username = "xxxxxxx@163.com";// 发件人真实的账户名
String password = "xxxxxxx";// 发件人密码
Mail.sendAndCc(smtp, from, to, copyto, subject, content, username,
password);
}

}

运行结果：

设置系统属性：mail.smtp.host smtp.163.com
准备获取邮件会话对象！
准备创建MIME邮件对象！
设置smtp身份认证：mail.smtp.auth = true
定义邮件主题！
定义收信人！
设置发信人！
邮件发送中....
发送成功！