Java发送邮件

本文以 Java 发送邮件功能，采用commons-email模式执行

依赖

<!-- 发送邮件 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-email</artifactId>
    <version>1.5</version>
</dependency>

代码

import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.HtmlEmail;
import java.util.List;

/**
 * @className: MailUtil.java
 * @description: 邮件工具类
 * @author: Demon
 * @date 2020/10/27 17:09
 */
public class MailUtil {

    /**
     * 构建器
     */
    public static class EmailInfo {

        /**
         * SMTP 服务器 端口
         */
        private String mailServer;
        private Integer mailPort;

        /**
         * 发件人 账号
         */
        private String mailNick;

        /**
         * 发件人 账号
         */
        private String mailUsername;

        /**
         * 发件人 密码
         */
        private String mailPassword;

        /**
         * 邮件标题
         */
        private String title;
        
        /**
         * 邮件内容
         */
        private String content;
        
        /**
         * 收件人
         */
        private List<String> receivers;

        boolean ssl;

        public EmailInfo(String mailServer,Integer mailPort,String mailNick,String mailUsername,
            String mailPassword,String title,String content,List<String> receivers,boolean ssl) {
            this.mailServer = mailServer;
            this.mailPort = mailPort;
            this.mailNick = mailNick;
            this.mailUsername = mailUsername;
            this.mailPassword = mailPassword;
            this.title = title;
            this.content = content;
            this.receivers = receivers;
            this.ssl = ssl;
        }

        public MailUtil send() throws Exception {
            return new MailUtil(this);
        }
    }

    private MailUtil(EmailInfo emailInfo) throws Exception {
        HtmlEmail email = new HtmlEmail();
        // 通过Server 发送邮件
        email.setHostName(emailInfo.mailServer);
        email.setSmtpPort(emailInfo.mailPort);
        //设定smtp服务器的认证资料信息
        email.setAuthentication(emailInfo.mailUsername, emailInfo.mailPassword);
        email.setStartTLSEnabled(false);
        email.setSSLOnConnect(emailInfo.ssl);
        try {
            // 设定发件人
            email.setFrom(emailInfo.mailUsername,emailInfo.mailNick);
            // 设定收件人 （多人）
            int size = emailInfo.receivers.size();
            email.addTo(emailInfo.receivers.toArray(new String[size]));
            // 设定内容的语言集
            email.setCharset("UTF-8");
            email.setDebug(false);
            // 设定主题
            email.setSubject(emailInfo.title);
            // 设定邮件内容
            email.setHtmlMsg(emailInfo.content);
            // 发送邮件
            email.send();
            System.out.println("邮件发送成功！");
        } catch (EmailException e) {
            System.out.println("邮件发送失败！");
            throw new Exception(e);
        }
    }
}

设置

新浪

20210129184031
String mailServer = smtp.sinanet.com
Integer mailPort = 25
boolean ssl = false

网易

20210129184347
20210129184412
如若开启了授权密码，请以授权密码当做用户密码使用
String mailServer = smtp.163.com
Integer mailPort = 25
boolean ssl = false

QQ

20210129190030
如若开启了授权密码，请以授权密码当做用户密码使用
String mailServer = smtp.qq.com
Integer mailPort = 465
boolean ssl = true

测试

@Test
public void 测试邮件() {
    try {
        String content = "<!doctypehtml><html lang=en><meta charset=UTF-8><title>Title</title><h1>测试</h1>";
        // 发送邮件信息
        String mailServer = "smtp.sinanet.com";
        Integer mailPort = 25;
        String mailNick = "demon";
        String mailUsername = "demon@xxxxxxxxx";
        String mailPassword = "123456789";
        String title = "本地测试";
        List<String> receivers = new ArrayList<>();
        receivers.add("1097305826@qq.com");
        MailUtil.EmailInfo emailInfo = new MailUtil.EmailInfo(mailServer,mailPort,
                mailNick,mailUsername,mailPassword,title, content,receivers,false);
        // 发送邮件
        emailInfo.send();
    } catch (Exception e) {
        e.printStackTrace();
    }
}