Java操作邮件发送

java发送Email，不限制邮件类型，邮箱号和私钥获取来就行

pom依赖

<!-- 邮件 spring-boot-starter-mail -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
    <version>2.3.4.RELEASE</version>
</dependency>

<!-- thymeleaf模板 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
    <version>2.2.13.RELEASE</version>
</dependency>

mail 发送邮件

thymeleaf 模板解析

实现

不配合项目配置文件使用的

package com.xx.xx.xx.config.email;

import com.sun.mail.util.MailSSLSocketFactory;
import freemarker.template.Configuration;
import freemarker.template.Template;
import lombok.extern.slf4j.Slf4j;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;




import javax.mail.Address;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.security.GeneralSecurityException;
import java.util.*;

/**
 * <p>
 *
 * </p>
 *
 * @author lph
 * @package com.xx.xx.xx.config.email
 * @project xx
 * @since 2022 -05 -25 11:49
 */
@Slf4j
public class EmailConfig {

    public static final String DEFAULT_EMAIL = "我设置的默认收件人";

     
    public static void sendEmail(Map<String, Object> params) {
        try {
          	//我将模板内解析信息 也放在了map中 
            String ACCOUNT=params.get("account").toString();
            String PWD =params.get("pwd").toString();
            String SMTPSERVER =params.get("server").toString();

            // 创建邮件配置 这些配置是不需要改动的
            Properties props = new Properties();
            props.setProperty("mail.transport.protocol", "smtp");
            props.setProperty("mail.smtp.host", params.get("server").toString());
            props.setProperty("mail.smtp.auth", "true");
            props.setProperty("mail.smtp.timeout", "994");
            props.setProperty("mail.smtp.port", "465");
            MailSSLSocketFactory sf = new MailSSLSocketFactory();
            sf.setTrustAllHosts(true);
            props.put("mail.smtp.ssl.enable", "true");
            props.put("mail.smtp.ssl.socketFactory", sf);


            props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
            props.setProperty("mail.smtp.auth", "true");
            props.setProperty("mail.smtp.ssl.enable", "true");
            Session session = Session.getDefaultInstance(props);

            FreeMarkerConfigurer freeMarkerConfigurer = new FreeMarkerConfigurer();
            Configuration cfg = new Configuration(Configuration.VERSION_2_3_27);
            cfg.setClassLoaderForTemplateLoading(ClassLoader.getSystemClassLoader(), "template");
            freeMarkerConfigurer.setConfiguration(cfg);

            Template template = freeMarkerConfigurer.getConfiguration().getTemplate("EmailTemplate.ftl");
            String mailText = FreeMarkerTemplateUtils.processTemplateIntoString(template, params);

             
            MimeMessage message = createEmail(session, mailText, params);
            log.info("邮件信息创建完毕!");
            Transport transport = session.getTransport();
            transport.connect(SMTPSERVER, ACCOUNT, PWD);
            transport.sendMessage(message, message.getAllRecipients());
            log.info("邮件发送成功!");
            transport.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static MimeMessage createEmail(Session session, String context, Map<String, Object> params) throws Exception {
        MimeMessage msg = new MimeMessage(session);
        MimeMessageHelper messageHelper = new MimeMessageHelper(msg, true, "utf-8");
        InternetAddress fromAddress = new InternetAddress(params.get("account").toString(),
                params.get("title").toString(), "utf-8");
        msg.setFrom(fromAddress);
        Address[] internetAddressTo = InternetAddress.parse(params.get("users").toString());

        msg.setRecipients(MimeMessage.RecipientType.TO, internetAddressTo);
        msg.setSubject("标题", "utf-8");
        messageHelper.setText(context, true);
        msg.setSentDate(new Date());
        msg.saveChanges();
        return msg;
    }
}


							//业务内调用
							Map<String, Object> params = new HashMap<>(18);
             
                params.put("users", "收件人列表 逗号隔开");
                params.put("server","服务地址");
                params.put("account","发件人账号");
                params.put("pwd","私钥"));
                
                EmailConfig.sendEmail(params);

模板 放在resource下 自行查找即可

数据库

CREATE TABLE `tb_send_email_conf`
(
    `email_id`      int(11)    NOT NULL AUTO_INCREMENT COMMENT 'email配置id',
    `email_account` varchar(30)                     DEFAULT NULL COMMENT '邮件账号',
    `email_type`    tinyint(1) NOT NULL COMMENT '1-发送方 2-接收方 3-即是发送方又是接收方',
    `email_server`  varchar(30)                     DEFAULT NULL COMMENT '发送方邮件账号的服务地址',
    `email_pwd`     varchar(255)                    DEFAULT NULL COMMENT '发送方邮件的秘钥',
    `enable_email`  tinyint(1) unsigned zerofill    DEFAULT '0' COMMENT '开启发送和接收 0-关闭 1-开启',
    `remarks`       varchar(200) CHARACTER SET utf8 DEFAULT NULL COMMENT '备注',
    `create_user`   int(11)                         DEFAULT NULL COMMENT '创建人ID',
    `create_time`   timestamp  NULL                 DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP COMMENT '创建日期',
    `update_user`   int(11)                         DEFAULT NULL COMMENT '编辑人ID',
    `update_time`   timestamp  NULL                 DEFAULT NULL COMMENT '编辑日期',
    `deleted_flag`  tinyint(1) NOT NULL             DEFAULT '0' COMMENT '删除状态（0正常，1逻辑删除）',
    PRIMARY KEY (`email_id`)
) ENGINE = InnoDB
  AUTO_INCREMENT = 1
  DEFAULT CHARSET = utf8mb4 COMMENT ='邮件配置';

使用配置文件的

package com.xx.xx.xx.config.email;

import com.sun.mail.util.MailSSLSocketFactory;
import freemarker.template.Configuration;
import freemarker.template.Template;
import lombok.extern.slf4j.Slf4j;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;




import javax.mail.Address;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.security.GeneralSecurityException;
import java.util.*;

/**
 * <p>
 *
 * </p>
 *
 * @author lph
 * @package com.xx.xx.xx.config.email
 * @project xx
 * @since 2022 -05 -25 11:49
 */
@Slf4j
public class EmailConfig {
    /**
     * 获取属性配置
     */
    private static Properties properties = new Properties();

    public static final String DEFAULT_EMAIL = "默认收件人";


    /**
     * 静态块初始化配置
     */
    static {
        try {
            properties.setProperty("mail.smtp.auth", "true");
            properties.setProperty("mail.smtp.timeout", "994");
            properties.setProperty("mail.smtp.server", "smtp.qq.com");
            properties.setProperty("mail.smtp.port", "465");

            properties.setProperty("mail.smtp.account", "发件人");
            properties.setProperty("mail.smtp.pwd", "秘钥");

            MailSSLSocketFactory sf = new MailSSLSocketFactory();
            sf.setTrustAllHosts(true);
            properties.put("mail.smtp.ssl.enable", "true");
            properties.put("mail.smtp.ssl.socketFactory", sf);
        } catch (GeneralSecurityException e) {
            e.printStackTrace();
        }
    }

    /**
     * 从属性文件中获取值其中key为smtp.server
     */
    public static String SMTPSERVER = properties.getProperty("mail.smtp.server");
    /**
     * 端口号
     */
    public static String SMTPPORT = properties.getProperty("mail.smtp.port");
    /**
     * 账户名
     */
    public static String ACCOUT = properties.getProperty("mail.smtp.account");
    /**
     * 授权密码
     */
    public static String PWD = properties.getProperty("mail.smtp.pwd");

     
    public static void sendEmail(Map<String, Object> params) {
        try {
            // 创建邮件配置
            Properties props = new Properties();
            props.setProperty("mail.transport.protocol", "smtp");
            props.setProperty("mail.smtp.host", SMTPSERVER);
            props.setProperty("mail.smtp.port", SMTPPORT);
            props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
            props.setProperty("mail.smtp.auth", "true");
            props.setProperty("mail.smtp.ssl.enable", "true");
            Session session = Session.getDefaultInstance(props);

            FreeMarkerConfigurer freeMarkerConfigurer = new FreeMarkerConfigurer();
            Configuration cfg = new Configuration(Configuration.VERSION_2_3_27);
            cfg.setClassLoaderForTemplateLoading(ClassLoader.getSystemClassLoader(), "template");
            freeMarkerConfigurer.setConfiguration(cfg);

            Template template = freeMarkerConfigurer.getConfiguration().getTemplate("EmailTemplate.ftl");
            String mailText = FreeMarkerTemplateUtils.processTemplateIntoString(template, params);

            
            params.put("title", "模板内数据");
            MimeMessage message = createEmail(session, mailText, params);
            log.info("邮件信息创建完毕!");
            Transport transport = session.getTransport();
            transport.connect(SMTPSERVER, ACCOUT, PWD);
            transport.sendMessage(message, message.getAllRecipients());
            log.info("邮件发送成功!");
            transport.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static MimeMessage createEmail(Session session, String context, Map<String, Object> params) throws Exception {
        MimeMessage msg = new MimeMessage(session);
        MimeMessageHelper messageHelper = new MimeMessageHelper(msg, true, "utf-8");
        InternetAddress fromAddress = new InternetAddress(ACCOUT,
                params.get("title").toString(), "utf-8");
        msg.setFrom(fromAddress);
        Address[] internetAddressTo = InternetAddress.parse(params.get("users").toString());

        msg.setRecipients(MimeMessage.RecipientType.TO, internetAddressTo);
        msg.setSubject("邮件标题", "utf-8");
        messageHelper.setText(context, true);
        msg.setSentDate(new Date());
        msg.saveChanges();
        return msg;
    }
}