java 实现邮件发送

import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
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 sun.misc.BASE64Encoder;

public class AnnexMailService {
private String host = "";
private String from = "";
private String to = "";
private String affix = "";
private String affixName = "";
private String user = "";
private String pwd = "";
private String subject = "";

public void setAddress(String from, String to, String subject) {
this.from = from;
this.to = to;
this.subject = subject;
}

public void setAffix(String affix, String affixName) {
this.affix = affix;
this.affixName = affixName;
}

public void send(String host, String user, String pwd) {
this.host = host;
this.user = user;
this.pwd = pwd;

Properties props = new Properties();

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

props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", Integer.valueOf(465));
props.put("mail.smtp.ssl.enable", Boolean.valueOf(true));

Session session = Session.getDefaultInstance(props);

session.setDebug(true);

MimeMessage message = new MimeMessage(session);
try {
message.setFrom(new InternetAddress(this.from));

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

message.setSubject(this.subject);

Multipart multipart = new MimeMultipart();

BodyPart contentPart = new MimeBodyPart();
contentPart.setText("第二种方法···");
multipart.addBodyPart(contentPart);

BodyPart messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(this.affix);

messageBodyPart.setDataHandler(new DataHandler(source));

BASE64Encoder enc = new BASE64Encoder();
messageBodyPart.setFileName("=?GBK?B?"
+ enc.encode(this.affixName.getBytes()) + "?=");
multipart.addBodyPart(messageBodyPart);

message.setContent(multipart);

message.saveChanges();

Transport transport = session.getTransport("smtp");

transport.connect(host, user, pwd);

transport.sendMessage(message, message.getAllRecipients());
transport.close();
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {

AnnexMailService cn = new AnnexMailService();
// 设置发件人地址、收件人地址和邮件标题
cn.setAddress("xxx@163.com", "xxxx@qq.com", "text测试");
// 设置要发送附件的位置和标题
cn.setAffix("D:\\adcfg.json", "abcfg.json");
// 设置smtp服务器以及邮箱的帐号和密码
cn.send("smtp.163.com", "xxx@163.com", "****");
}
}