javamail 发送邮件

import java.util.Enumeration;
import java.util.Properties;
import java.util.Vector;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
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 java.io.FileReader;
import java.io.FileInputStream;
import java.io.IOException;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;

public class MailTest {

//邮件体
Multipart mp = new MimeMultipart();

//定义字符串
//邮件服务器地址
String mailserver = "";
//用户名
String user = "";
//密码
String password = "";
//主题
String subject = "";
//发件人地址
String fromAddr = "";
//收件人地址
String toAddr = "";
//邮件正文引入文件路径
String msgfilepath = "";
//抄送人地址
String ccAddr = "";
//密送人地址
String bccAddr = "";
//附件路径
String withfilepath = "";

public MailTest() {
}

public static void main(String[] args) throws IOException {
//发送邮件
new MailTest().sendMail();
}

/**
* 获取文本文件内容
* @param path String
* @throws IOException
* @return String
*/
public String getFile(String path) throws IOException {
//读取文件内容
char[] chrBuffer = new char[10];//缓冲十个字符
int intLength;
String s = "";//文件内容字符串
FileReader fis = new FileReader(path);
while ( (intLength = fis.read(chrBuffer)) != -1) {
String temp = String.valueOf(chrBuffer);//转换字符串
s = s + temp;//累加字符串
}
return s;
}

public void sendMail() throws IOException {
//读取配置文件
Properties setupfile = new Properties();
FileInputStream fis = new FileInputStream("setup.properites");
setupfile.load(fis);
mailserver = setupfile.getProperty("mailserver");
user = setupfile.getProperty("user");
password = setupfile.getProperty("password");
subject = setupfile.getProperty("subject");
fromAddr = setupfile.getProperty("fromAddr");
toAddr = setupfile.getProperty("toAddr");
ccAddr = setupfile.getProperty("ccAddr");
bccAddr = setupfile.getProperty("bccAddr");
withfilepath = setupfile.getProperty("withfilepath");
//信件内容文件路径
msgfilepath = setupfile.getProperty("msgfilepath");
//获取信件内容
String message = getFile(msgfilepath);

try {
Properties props = new Properties();
props.put("mail.smtp.host", mailserver); //例如：202.108.44.206 smtp.163.com
props.put("mail.smtp.auth", "true"); //认证是否设置

//建立会话并且认证
Session session = Session.getDefaultInstance(props,
new Authenticator() {
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}
}
);
Message msg = new MimeMessage(session);
//发送源地址
msg.setFrom(new InternetAddress(fromAddr));
//发送目的地址
InternetAddress[] tos = InternetAddress.parse(toAddr);
msg.setRecipients(Message.RecipientType.TO, tos);
//抄送目的地址
InternetAddress[] toscc = InternetAddress.parse(ccAddr);
msg.setRecipients(Message.RecipientType.CC, toscc);

//密送目的地址
InternetAddress[] tosbcc = InternetAddress.parse(bccAddr);
msg.setRecipients(Message.RecipientType.BCC, tosbcc);

//主题
msg.setSubject(subject);

//邮件内容
//msg.setText(message);//发送不带附件时用，简单信件。
//把信件内容放入mp内，和附件一样的放发，作为一个整体发送。
MimeBodyPart mbps = new MimeBodyPart();
mbps.setText(message);
mp.addBodyPart(mbps);

//附件
Vector file = new Vector();
file.addElement(withfilepath);
//附件名集合枚举
Enumeration efile = file.elements();
while (efile.hasMoreElements()) {
MimeBodyPart mbp = new MimeBodyPart();
//选择出每一个附件名
String filename = efile.nextElement().toString();
//得到数据源
FileDataSource fds = new FileDataSource(filename);
//得到附件本身并至入BodyPart
mbp.setDataHandler(new DataHandler(fds));
//得到文件名同样至入BodyPart
mbp.setFileName(fds.getName());
mp.addBodyPart(mbp);
}
//移走集合中的所有元素
file.removeAllElements();
//Multipart加入到信件
msg.setContent(mp);

//发送
Transport.send(msg);
System.out.println("Mail is Sent");
}
catch (Exception e) {
System.out.println(e);
}

}
}