使用Javamail发送邮件Util

maven:

<dependency>
 <groupId>javax.mail</groupId>
 <artifactId>mail</artifactId>
 <version>${javax-mail.version}</version>
</dependency>
<dependency>

config.properties:

######发送邮件配置##########
mail.smtp.host = 
mail.smtp.port=465
mail.smtp.protocol=smtp
#######发送方账号和密码
mail.sender.username=
mail.sender.password=
#######收件人邮箱，多人以逗号(英文)隔开
mail.receive.user=

code:
package com.exl.analysis.core.util;

import com.exl.framework.common.util.PropertyUtils;
import com.exl.framework.log.CustomLogger;
import com.sun.mail.util.MailSSLSocketFactory;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.security.GeneralSecurityException;
import java.util.List;
import java.util.Properties;

public class SendEmailUtil {

    private MimeMessage message;

    private String mailHost = "";
    private String mailPort = "";
    private String mailProtocol = "";
    private String sender_username = "";
    private String sender_password = "";
    // 收件人列表，以","分割

    private Properties properties = new Properties();

    /*
     * 初始化方法
     */
    public SendEmailUtil(Boolean debug) {
        this.mailHost = PropertyUtils.get("mail.smtp.host");
        this.mailPort = PropertyUtils.get("mail.smtp.port");
        this.mailProtocol = PropertyUtils.get("mail.smtp.protocol");
        this.sender_username = PropertyUtils .get("mail.sender.username");
        this.sender_password = PropertyUtils.get("mail.sender.password");
    }

    /**
     * 指定发送邮件
     *
     * @param subject
     *            邮件主题
     * @param sendHtml
     *            邮件内容
     * @param filePath
     *            附件列表
     * @param receiveUser
     *            收件人（多个以英文逗号隔开）
     */
    public boolean sendEmail(String subject,String sendHtml,List<String> filePath,String receiveUser){
        Properties prop = new Properties();
        // 协议
        prop.setProperty("mail.transport.protocol", mailProtocol);
        // 服务器
        prop.setProperty("mail.smtp.host", mailHost);
        // 端口
        prop.setProperty("mail.smtp.port", mailPort);
        // 使用smtp身份验证
        prop.setProperty("mail.smtp.auth", "true");
        // 使用SSL，企业邮箱必需！
        // 开启安全协议
        MailSSLSocketFactory sf = null;
        try {
            sf = new MailSSLSocketFactory();
            sf.setTrustAllHosts(true);
        } catch (GeneralSecurityException e1) {
            System.out.println("开启SSL加密异常！");
            e1.printStackTrace();
            return false;
        }
        prop.put("mail.smtp.ssl.enable", "true");
        prop.put("mail.smtp.ssl.socketFactory", sf);
        Session session = Session.getDefaultInstance(prop, new MyAuthenticator(
                sender_username, sender_password));
        // 开启DEBUG模式,在控制台中或日志中有日志信息显示，也就是可以从控制台中看一下服务器的响应信息；
        session.setDebug(true);
        message = new MimeMessage(session);
        try{
            message.setFrom(new InternetAddress(sender_username));
            //邮件主题
            message.setSubject(subject);
            // 向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
            Multipart multipart = new MimeMultipart();
            // 添加邮件正文
            BodyPart contentPart = new MimeBodyPart();
            contentPart.setContent(sendHtml, "text/html;charset=UTF-8");
            multipart.addBodyPart(contentPart);
            if (filePath != null && filePath.size() > 0) {
                for (String filename : filePath) {
                    BodyPart attachmentBodyPart = new MimeBodyPart();
                    DataSource source = new FileDataSource(filename);
                    attachmentBodyPart.setDataHandler(new DataHandler(
                            source));
                    // MimeUtility.encodeWord可以避免文件名乱码
                    attachmentBodyPart.setFileName(MimeUtility
                            .encodeWord(source.getName()));
                    multipart.addBodyPart(attachmentBodyPart);
                }
                // 移走集合中的所有元素
                filePath.clear();
            }
            // 将multipart对象放到message中

            message.setContent(multipart);
            message.setRecipients(Message.RecipientType.TO,receiveUser);
            message.saveChanges();
            // 发送
            Transport.send(message);
            System.out.println("send success!");
            return true;
        }catch (Exception e){
            return false;
        }
    }

}