本例中利用commons-email發送郵件並進行封裝，支持html內容和附件；Commons Email是Apache的Commons子項目下的一個郵件客戶端組件，它是基於JavaMail的，大大簡化了郵件的收發操作。

該工具類支持多個發送人，多個抄送人，多個密送人，多個附件等功能。非常強大。

pom.xml

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.16.10</version>
</dependency>
<!-- email -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-email</artifactId>
    <version>1.4</version>
</dependency>

MailInfo.java

package com.example.demo.email;

import lombok.Data;
import org.apache.commons.mail.EmailAttachment;

import java.util.List;

/**
 * Created by 敲代碼的卡卡羅特 on 2018/3/29.
 */
@Data
public class MailInfo {
    // 收件人
    private List<String> toAddress = null
 
;
    // 抄送人地址
    private List<String> ccAddress = null;
    // 密送人
    private List<String> bccAddress = null;
    // 附件信息
    private List<EmailAttachment> attachments = null;
    // 郵件主題
    private String subject;
    // 郵件的文本內容
    private String content;


    public void
 
 addToAddress(String toAddress) {
        this.toAddress.add(toAddress);
    }

    public void addToAddress(List<String> toAddress) {
        this.toAddress.addAll(toAddress);
    }

    public void addCcAddress(List<String> ccAddress) {
        if (null != ccAddress && ccAddress.size() > 0)
            this.ccAddress.addAll(ccAddress);
    }

}

MailUtil.java

package com.example.demo.email;

import org.apache.commons.mail.EmailAttachment;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.HtmlEmail;

import java.util.List;

/**
 * Created by 敲代碼的卡卡羅特 on 2018/3/29.
 */
public class MailUtil {
    //郵箱
    private static String mailServerHost = "smtp.163.com";
    private static String mailSenderAddress = "[email protected]";
    private static String mailSenderNick = "敲代碼的卡卡羅特";
    private static String mailSenderUsername = "[email protected]";
    private static String mailSenderPassword = "xxxxx";

    /**
     * 發送 郵件方法 (Html格式，支持附件)
     *
     * @return void
     */
    public static void sendEmail(MailInfo mailInfo) {

        try {
            HtmlEmail email = new HtmlEmail();
            // 配置信息
            email.setHostName(mailServerHost);
            email.setFrom(mailSenderAddress,mailSenderNick);
            email.setAuthentication(mailSenderUsername,mailSenderPassword);
            email.setCharset("UTF-8");
            email.setSubject(mailInfo.getSubject());
            email.setHtmlMsg(mailInfo.getContent());

            // 添加附件
            List<EmailAttachment> attachments = mailInfo.getAttachments();
            if (null != attachments && attachments.size() > 0) {
                for (int i = 0; i < attachments.size(); i++) {
                    email.attach(attachments.get(i));
                }
            }

            // 收件人
            List<String> toAddress = mailInfo.getToAddress();
            if (null != toAddress && toAddress.size() > 0) {
                for (int i = 0; i < toAddress.size(); i++) {
                    email.addTo(toAddress.get(i));
                }
            }
            // 抄送人
            List<String> ccAddress = mailInfo.getCcAddress();
            if (null != ccAddress && ccAddress.size() > 0) {
                for (int i = 0; i < ccAddress.size(); i++) {
                    email.addCc(ccAddress.get(i));
                }
            }
            //郵件模板 密送人
            List<String> bccAddress = mailInfo.getBccAddress();
            if (null != bccAddress && bccAddress.size() > 0) {
                for (int i = 0; i < bccAddress.size(); i++) {
                    email.addBcc(ccAddress.get(i));
                }
            }
            email.send();
            System.out.println("郵件發送成功！");
        } catch (EmailException e) {
            e.printStackTrace();
        }

    }
}

Test.java

package com.example.demo.email;

import org.apache.commons.mail.EmailAttachment;

import java.util.ArrayList;
import java.util.List;

/**
 * Created by 敲代碼的卡卡羅特 on 2018/3/29.
 */
public class Test {
    /**
     * @return void
     */
    public static void main(String[] args) {
        MailInfo mailInfo = new MailInfo();
        List<String> toList = new ArrayList<String>();
        toList.add("[email protected]");

        List<String> ccList = new ArrayList<String>();
        ccList.add("[email protected]");

        List<String> bccList = new ArrayList<String>();
        bccList.add("[email protected]");

        //添加附件
        EmailAttachment att = new EmailAttachment();
        att.setPath("E:\\liuzhonghua\\備份\\xx.txt");
        att.setName("遠程地址.txt");
        List<EmailAttachment> atts = new ArrayList<EmailAttachment>();
        atts.add(att);
        mailInfo.setAttachments(atts);

        mailInfo.setToAddress(toList);//收件人
        mailInfo.setCcAddress(ccList);//抄送人
        mailInfo.setBccAddress(bccList);//密送人

        mailInfo.setSubject("測試主題");
        mailInfo.setContent("內容：<h1>test,測試</h1>");

        MailUtil.sendEmail(mailInfo);

    }
}

ok,親測可用！！！！！！

java利用commons-email發送郵件並進行封裝