java发送邮件（带PDF附件）代码

pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>email</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.sun.mail</groupId>
            <artifactId>javax.mail</artifactId>
            <version>1.6.2</version>
        </dependency>
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1.1</version>
        </dependency>
    </dependencies>

</project>

package com.ecg.controller;
 
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.util.Properties;
 
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
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;
 
import com.sun.mail.util.MailSSLSocketFactory;

public class MailTest {
 
 
	public static void main(String [] args) throws GeneralSecurityException, UnsupportedEncodingException 
	{
		// 收件人电子邮箱
		String to = "[email protected]";
 
		// 发件人电子邮箱
		String from = "[email protected]";
 
		// 指定发送邮件的主机为 smtp.qq.com
		String host = "smtp.qq.com";  //QQ 邮件服务器
 
		// 获取系统属性
		Properties properties = System.getProperties();
 
		// 设置邮件服务器
		properties.setProperty("mail.smtp.host", host);
 
		properties.put("mail.smtp.auth", "true");
		MailSSLSocketFactory sf = new MailSSLSocketFactory();
		sf.setTrustAllHosts(true);
		properties.put("mail.smtp.ssl.enable", "true");
		properties.put("mail.smtp.ssl.socketFactory", sf);
		// 获取默认session对象
		Session session = Session.getDefaultInstance(properties,new Authenticator(){
			public PasswordAuthentication getPasswordAuthentication()
			{     //qq邮箱服务器账户、第三方登录授权码
				return new PasswordAuthentication("[email protected]", "wylhuoah"); //发件人邮件用户名、密码
			}
		});
 
		try{
			// 创建默认的 MimeMessage 对象
			MimeMessage message = new MimeMessage(session);
 
			// Set From: 头部头字段
			message.setFrom(new InternetAddress(from));
 
			// Set To: 头部头字段
			message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
 
			// Set Subject: 主题文字
			message.setSubject("邮件测试1");
 
	         // 创建消息部分
	         BodyPart messageBodyPart = new MimeBodyPart();
	 
	         // 消息
	         messageBodyPart.setText("邮件测试1");
 
			 // 创建多重消息
	         Multipart multipart = new MimeMultipart();
	 
	         // 设置文本消息部分
	         multipart.addBodyPart(messageBodyPart);
	 
	         // 附件部分
	         messageBodyPart = new MimeBodyPart();
			//设置要发送附件的文件路径
	         String filename = "E:/testout1.pdf";

	         //设置附件中显示的文件名,通过filename解析出来
			String receiveName = "testout1.pdf";

	         DataSource source = new FileDataSource(filename);

	         messageBodyPart.setDataHandler(new DataHandler(source));
	         
	         //messageBodyPart.setFileName(filename);
	         //处理附件名称中文（附带文件路径）乱码问题
	         messageBodyPart.setFileName(MimeUtility.encodeText(receiveName));
	         multipart.addBodyPart(messageBodyPart);
	 
	         // 发送完整消息
	         message.setContent(multipart);

			//保存邮件
			message.saveChanges();
	 
	         //   发送消息
	         Transport.send(message);
	         System.out.println("Sent message successfully....");
	      }catch (MessagingException mex) {
	         mex.printStackTrace();
	      }
	}
}