java发送邮件(使用Hutool的MailUtil工具类发送邮件)

1、引入邮件依赖

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

说明 :com.sun.mailjavax.mail升级后的版本。

2、邮件服务器配置

classpath(在标准Maven项目中为src/main/resources)的config目录下新建mail.setting文件:
配置文件全路径为:src/main/resources/config/mail.setting,推荐使用官方的完整配置,最小配置有时候配的不对还是有问题。

# 邮件服务器的SMTP地址,可选,默认为smtp.<发件人邮箱后缀>
host = smtp.qq.com
# 邮件服务器的SMTP端口,可选,默认25
port = 25
# 发件人(必须正确,否则发送失败)
from = 123456789@qq.com
# 用户名,默认为发件人邮箱前缀
user = 123456789
# 密码(注意,某些邮箱需要为SMTP服务单独设置授权码,详情查看相关帮助)
pass = xxxxxxxxxxxxxxxxx

3、发送邮件代码

package com.xxx.xxx.utils;

import cn.hutool.core.io.FileUtil;
import cn.hutool.extra.mail.MailUtil;
 
/**
 * 邮箱工具类
 *
 * @author avatar
 * @since 2022-03-18
 */
public class MailTest {

    public static void main(String[] args) {
    	//发送普通文本邮件,最后一个参数可选是否添加多个附件

		//无附件
		MailUtil.send("123456789@qq.com", "测试标题", "测试内容", false);
		//有附件
    	MailUtil.send("123456789@qq.com", "测试标题", "测试内容", true,
    			FileUtil.file("/Users/xxx/Downloads/xxx202203181549106.xlsx"));
	}
 
}
/* * JCatalog Project */ package com.hexiang.utils; import java.util.List; import java.util.ArrayList; import java.util.Date; import java.util.Iterator; import java.util.Properties; import javax.mail.Session; import javax.mail.Transport; import javax.mail.Message; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.hexiang.exception.CatalogException; /** * Utility class to send email. * * @author <a href="380595305@qq.com">hexiang</a> */ public class EmailUtil { //the logger for this class private static Log logger = LogFactory.getLog("com.hexiang.util.EmailUtil"); /** * Send email to a single recipient. * * @param smtpHost the SMTP email server address * @param senderAddress the sender email address * @param senderName the sender name * @param receiverAddress the recipient email address * @param sub the subject of the email * @param msg the message content of the email */ public static void sendEmail(String smtpHost, String senderAddress, String senderName, String receiverAddress, String sub, String msg) throws CatalogException { List<String> recipients = new ArrayList<String>(); recipients.add(receiverAddress); sendEmail(smtpHost, senderAddress, senderName, recipients, sub, msg); } /** * Send email to a list of recipients. * * @param smtpHost the SMTP email server address * @param senderAddress the sender email address * @param senderName the sender name * @param recipients a list of receipients email addresses * @param sub the subject of the email * @param msg the message content of the email */ public static void sendEmail(String smtpHost, String senderAddress, String senderName, List<String> recipients, String sub, String msg) throws CatalogException { if (smtpHost == null) { String errMsg = "Could not send email: smtp host address is null"; logger.error(errMsg); throw new CatalogException(errMsg); } try { Properties props = System.getProperties(); props.put("mail.smtp.host", smtpHost); Session session = Session.getDefaultInstance(props, null ); MimeMessage message = new MimeMessage( session ); message.addHeader("Content-type", "text/plain"); message.setSubject(sub); message.setFrom(new InternetAddress(senderAddress, senderName)); for (Iterator<String> it = recipients.iterator(); it.hasNext();) { String email = (String)it.next(); message.addRecipients(Message.RecipientType.TO, email); } message.setText(msg); message.setSentDate( new Date() ); Transport.send(message); } catch (Exception e) { String errorMsg = "Could not send email"; logger.error(errorMsg, e); throw new CatalogException("errorMsg", e); } } }
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