Java 发送带附件邮件
Java 发送邮件有两种实现方法。一种是通过JAVA MAIL jar包，还有一种办法是通过Spring Mail Api发送邮件。下面是详细代码：
Java Mail
需要 javax.mail jar包
import java.io.UnsupportedEncodingException;
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.MessagingException;
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 javax.mail.internet.MimeUtility;
public class test {
public static void main(String[] args) throws UnsupportedEncodingException {
final String username = "发件人邮箱";
final String password = "邮箱密码";
final String host = "邮箱主机";
final String to = "收件人邮箱";
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.ssl.enable", "true");
//props.setProperty("mail.transport.protocol", "smtp");
//不做服务器证书校验
props.put("mail.smtp.ssl.checkserveridentity", "false");
//添加信任的服务器地址，多个地址之间用空格分开
props.put("mail.smtp.ssl.trust", "host");
props.put("mail.smtp.host", "host");
props.put("mail.smtp.port", "25");
// SMTP邮件服务器默认端口,默认为25
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(username, password);
}
});
try {
session.setDebug(true);
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(username));
message.setRecipient(Message.RecipientType.TO,
new InternetAddress(to));
// message.setRecipient(Message.RecipientType.CC,
// new InternetAddress(“另一个人的邮箱”));
message.setSubject(“Email Testing Subject”);
//添加附件
Multipart multipart = new MimeMultipart();
BodyPart part = new MimeBodyPart();
part.setContent(“你好啊！”, “text/html;charset=UTF-8”);
multipart.addBodyPart(part);
BodyPart part2 = new MimeBodyPart();
DataSource dataSource = new FileDataSource("附件的绝对路径，记得分隔符是 //");
DataHandler dataHandler = new DataHandler(dataSource);
// 得到附件本身并至入BodyPart
part2.setDataHandler(dataHandler);
part2.setFileName(MimeUtility.encodeText(dataSource.getName()));
multipart.addBodyPart(part2);
message.setContent(multipart);
System.out.println("start");
Transport.send(message);
System.out.println("end");
} catch (MessagingException e) {
throw new RuntimeException(e);
}
}
}
Spring mail jar包发送邮件
需要导入 Spring core 包和Spring bens包和Spring aop包
import java.io.File;
import java.util.Properties;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.MailException;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
public class test2 {
/**
* 本类测试简单邮件 直接用邮件发送
*
* @Author Li
* @throws MessagingException
*
*/
public static void main(String args[]) throws MessagingException
{
JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();
// 设定mail server
senderImpl.setHost("邮箱服务器");
/*
* // 建立邮件消息
SimpleMailMessage mailMessage = new SimpleMailMessage();
*/
// 建立邮件消息,发送简单邮件和html邮件的区别
MimeMessage mailMessage = senderImpl.createMimeMessage();
MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage,true);
/*
//建立邮件信息 带附件的
// 注意这里的boolean,等于真的时候才能嵌套图片，在构建MimeMessageHelper时候，所给定的值是true表示启用，
// multipart模式 为true时发送附件 可以设置html格式
MimeMessage mailMessage = senderImpl.createMimeMessage();
MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage,
true, "utf-8");
*/
// 设置收件人，寄件人 用数组发送多个邮件
// String[] array = new String[] {"[email protected]","[email protected]"};
// mailMessage.setTo(array);
messageHelper.setTo("收件人邮箱"); // 设置收件人
messageHelper.setFrom("发件人邮箱"); // 设置发件人
messageHelper.setSubject(" 测试邮件发送！ "); // 设置主题
/*
//简单文件的文本
messageHelper.setText(" 测试我的简单邮件发送机制！！ ");
*/
//html邮件的文本
// messageHelper.setText(“
hello!!spring html Mail
“,// true);
//html 带图片的文本
messageHelper.setText(
“
hello!!spring image html mail
”+ “ “, true);
FileSystemResource img = new FileSystemResource(new File("e:/123.jpg"));
messageHelper.addInline("aaa", img);
/*
// 带附件的文本
messageHelper.setText(
"你好：附件中有学习资料！
",
true);
FileSystemResource file = new FileSystemResource(new File("e:/test.rar"));
// 这里的方法调用和插入图片是不同的。
messageHelper.addAttachment("test.rar", file);
*/
senderImpl.setUsername("用户账号");
senderImpl.setPassword("用户密码");
Properties prop = new Properties();
// 将这个参数设为true，让服务器进行认证,认证用户名和密码是否正确
prop.put(" mail.smtp.auth ", " true ");
//Socket I/O timeout value in milliseconds. Default is infinite timeout.
prop.put(" mail.smtp.timeout ", " 25000 ");
//If set to true, use SSL to connect and use the SSL port by default.
//Defaults to false for the "smtp" protocol and true for the "smtps" protocol.
prop.put("mail.smtp.ssl.enable", "true");
// SMTP邮件服务器默认端口,默认为25
prop.put("mail.smtp.port", "25");
//If set to true, checks the server identity as specified by RFC 2595. Defaults to false.
prop.put("mail.smtp.ssl.checkserveridentity", "false");
//If set, and a socket factory hasn't been specified, enables use of a MailSSLSocketFactory.
//If set to "*", all hosts are trusted.
//If set to a whitespace separated list of hosts, those hosts are trusted.
//Otherwise, trust depends on the certificate the server presents.
prop.put("mail.smtp.ssl.trust", "邮箱服务器");
senderImpl.setJavaMailProperties(prop);
// 发送邮件
try {
System.out.println("发送邮件");
senderImpl.send(mailMessage);
} catch (MailException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println(" 邮件发送成功.. ");
}
}