发送邮件的工具类以及发送邮件的示例代码，支持发送html标签，和发送附件。依赖commons-email和mail两个jar包。

/** * 发送邮件Util */public final class MailUtil {    //发送邮件的主机    private static String mailServerHost = "smtp.126.com";    //发件人邮箱    private static String mailSenderAddress = "发件邮箱地址@126.com";    //发件人昵称    private static String mailSenderNick = "发件人昵称";    //发件人使用的账号    private static String mailSenderUsername = "发件邮箱地址@126.com";    //登陆发件主机的密码（或授权码）    private static String mailSenderPassword = "授权码";    /**     * 发送 邮件方法 (Html格式，支持附件)     *      * @return void     */    public static final boolean sendEmail(MailInfo mailInfo) {                 try {            HtmlEmail email = new HtmlEmail();            // 配置发送邮件的主机            email.setHostName(mailServerHost);            // 配置发送者地址和昵称            email.setFrom(mailSenderAddress,mailSenderNick);            // 配置用于登陆发送邮件主机的账号和登陆密码（或授权码）            email.setAuthentication(mailSenderUsername,mailSenderPassword);            // 配置邮件使用的字符集            email.setCharset("UTF-8");            // 设置启用SSL连接            email.setSSLOnConnect(true);            //设置邮件主题            email.setSubject(mailInfo.getSubject());            //设置邮件内容            email.setHtmlMsg(mailInfo.getContent());            //设置当邮件客户端不能显示HTML标签时的提示语句            email.setTextMsg("您的邮件客户端不支持HTML标签(Your email client does not support HTML messages)");            // 添加附件            List
     
       attachments = mailInfo.getAttachments();            if (!attachments.isEmpty()) {                for (EmailAttachment emailAttachment : attachments) {                     email.attach(emailAttachment);                }            }            // 添加收件人            Set
      
        toAddress = mailInfo.getToAddress();            if (!toAddress.isEmpty()) {                System.out.print("收件人：");                for (String string : toAddress) {                    email.addTo(string);                    System.out.print(string+"\t");                }                System.out.println();            }            // 添加抄送人            Set
       
         ccAddress = mailInfo.getCcAddress();            if (!ccAddress.isEmpty()) {                for (String string : ccAddress) {                    email.addCc(string);                }            }            //发送邮件            email.send();            System.out.println("邮件发送成功！");            return true;        } catch (Exception e) {            e.printStackTrace();        }         return false;    }    /**     * 根据邮件主题和收件人，创建一封邮件对象     * @param subject 邮件主题     * @param toAddress 收件人     * @return     */    public static final MailInfo createEmail(String subject,String toAddress) {        return new MailInfo(subject,toAddress);    }    /**     * 封装一封邮件信息的类     */    public static class MailInfo {        // 收件人        private Set
        
          toAddress = new HashSet<>();        // 抄送人地址        private Set
         
           ccAddress = new HashSet<>();        // 附件信息        private List
          
            attachments = new ArrayList<>(); // 邮件主题 private String subject; // 邮件的文本内容 private StringBuffer content = new StringBuffer(); private MailInfo(String subject,String toAddress) { this.subject = subject; this.toAddress.add(toAddress.trim()); } /** * 添加收件人 * @param toAddress */ public void addToAddress(String... toAddress) { for (String string : toAddress) { this.toAddress.add(string.trim()); } } /** * 添加抄送人 * @param ccAddress */ public void addCcAddress(String... ccAddress) { for (String string : ccAddress) { this.ccAddress.add(string.trim()); } } /** * 添加本地文件为附件 * @param aPath：附件路径 * @param aName：附件名字 * @param description：附件描述 */ public void addAttachment(String aPath,String aName,String description) { EmailAttachment attachment = new EmailAttachment(); attachment.setDisposition(EmailAttachment.ATTACHMENT); attachment.setName(aName); attachment.setPath(aPath); attachment.setDescription(description); this.attachments.add(attachment); } /** * 添加远程文件为附件 * @param aUrl：附件资源的路径 * @param aName：附件的名字 * @param description：附件的描述 */ public void addAttachment(URL aUrl,String aName,String description) { EmailAttachment attachment = new EmailAttachment(); attachment.setDisposition(EmailAttachment.ATTACHMENT); attachment.setName(aName); attachment.setURL(aUrl); attachment.setDescription(description); this.attachments.add(attachment); } public void setSubject(String subject) { this.subject = subject; } public void addContent(String content) { this.content.append(content); } public Set
           
             getToAddress() { return toAddress; } public Set
            
              getCcAddress() { return ccAddress; } public List
             
               getAttachments() { return attachments; } public String getSubject() { return subject==null?"快学大数据":subject; } public String getContent() { return content.toString(); } }}
             
            
           
          
         
        
       
      
     

 

 

发送邮件的测试类：

import java.net.MalformedURLException;import java.net.URL;import com.kuaixueit.utils.MailInfo;import com.kuaixueit.utils.MailUtil;public class EmailTest {    public static void main(String[] args) throws MalformedURLException {        //创建一个MailInfo对象，用来表示要发送的邮件        MailUtil.MailInfo mail = MailUtil.createEmail("这是一封测试邮件","收件邮箱");//设置邮件内容        mail.addContent("
这是一封来自快学大数据的生日问候！
");        //往邮件中添加一个超链接        mail.addContent("点我查看美女
");        mail.addContent("");        //往邮件中添加一个附件，附件是本地文件        mail.addAttachment("F:\\pic\\3c560cf458034c21b54c5b6a77120045.jpg", "美女图片.jpg", "这是送给你的生日福利");        //往邮件中添加一个附件，附件是一个远程图片        mail.addAttachment(new URL("https://www.baidu.com/img/bd_logo1.png?where=super"), "美女图片2.jpg", "这是送给你的生日福利");        //调用工具类发送邮件        MailUtil.sendEmail(mail);    }}

收件箱收到的邮件：