Springboot多邮件地址发送邮件

1. 自定义配置文件

import org.springframework.boot.autoconfigure.mail.MailProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author devcxl
 */
@Component
@ConfigurationProperties(prefix = "spring.mail")
public class MailConfig {
    private List<MailProperties> configs;

    public List<MailProperties> getConfigs() {
        return configs;
    }

    public void setConfigs(List<MailProperties> configs) {
        this.configs = configs;
    }
}

2. 邮件发送配置 MailSenderConfig

import com.devcxl.mail.MailAllSender;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.autoconfigure.mail.MailProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.mail.javamail.JavaMailSenderImpl;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Properties;

/**
 * @author devcxl
 */
@Configuration
@ConditionalOnProperty(
        prefix = "spring.mail",
        name = {"configs"}
)
public class MailSenderConfig {

    /**
     * AllMailSender 没有被配置时自动配置
     *
     * @return
     */
    @Bean
    @ConditionalOnMissingBean({MailAllSender.class})
    MailAllSender mailAllSender(MailConfig config) {
        MailAllSender allSender = new MailAllSender();
        List<JavaMailSenderImpl> javaMailSenders = new ArrayList<>();
        List<MailProperties> configs = config.getConfigs();
        for (MailProperties mailProperties : configs) {
            JavaMailSenderImpl sender = new JavaMailSenderImpl();
            this.applyProperties(mailProperties, sender);
            javaMailSenders.add(sender);
        }
        allSender.setJavaMailSenders(javaMailSenders);
        return allSender;
    }

    private void applyProperties(MailProperties properties, JavaMailSenderImpl sender) {
        sender.setHost(properties.getHost());
        if (properties.getPort() != null) {
            sender.setPort(properties.getPort());
        }
        sender.setUsername(properties.getUsername());
        sender.setPassword(properties.getPassword());
        sender.setProtocol(properties.getProtocol());
        if (properties.getDefaultEncoding() != null) {
            sender.setDefaultEncoding(properties.getDefaultEncoding().name());
        }
        if (!properties.getProperties().isEmpty()) {
            sender.setJavaMailProperties(this.asProperties(properties.getProperties()));
        }
    }

    private Properties asProperties(Map<String, String> source) {
        Properties properties = new Properties();
        properties.putAll(source);
        return properties;
    }

}

3. 邮件发送组件 MailAllSender


import com.devcxl.mail.constant.Constant;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.annotation.Resource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;
import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.Objects;

/**
 * @author devcxl
 */
@Slf4j
public class MailAllSender {

    @Resource
    private RedisTemplate<String, Object> redisTemplate;

    private List<JavaMailSenderImpl> javaMailSenders;

    public List<JavaMailSenderImpl> getJavaMailSenders() {
        return javaMailSenders;
    }

    public void setJavaMailSenders(List<JavaMailSenderImpl> javaMailSenders) {
        this.javaMailSenders = javaMailSenders;
    }

    /**
     * 轮询使用MailSender
     *
     * @return
     */
    public JavaMailSenderImpl getSender() {
        Long increment = redisTemplate.opsForValue().increment(Constant.MAIL_SEND_STEP_NUM);
        long countNumber = increment != null ? increment : 0L;
        int size = this.javaMailSenders.size();
        int selectSender = (int) (countNumber % size);
        return this.javaMailSenders.get(selectSender);
    }

    /**
     * 轮询使用MailSender
     *
     * @return
     */
    public void send(String to, String senderName, String title, String content, boolean isHtml) {
        JavaMailSenderImpl sender = this.getSender();
        MimeMessage mimeMessage = sender.createMimeMessage();
        try {
            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true, StandardCharsets.UTF_8.toString());
            mimeMessageHelper.setTo(to);
            mimeMessageHelper.setFrom(senderName);
            mimeMessageHelper.setText(content, isHtml);
            mimeMessageHelper.setSubject(title);
            for (Integer attachmentFileId : attachmentFileIds) {
                File file = null;
                mimeMessageHelper.addAttachment(file.getName(), file);
            }
        } catch (MessagingException e) {
            log.error("邮件发送错误", e);
        }
    }

}

配置示例

spring:
    mail:
        configs:
            -   host: email-smtp.ap-southeast-1.amazonaws.com
                port: 465
                username: youName
                password: youPassword
                properties:
                    "mail.smtp.auth": true
                    "mail.smtp.ssl.enable": true
                    "mail.smtp.starttls.enable": true
                    "mail.smtp.starttls.required": true
                    "mail.imap.ssl.socketFactory.fallback": false
                protocol: smtps
                default-encoding: UTF-8

            -   host: smtp.qq.com
                port: 465
                username: testmail@qq.com
                password: youPassword
                properties:
                    "mail.smtp.auth": true
                    "mail.smtp.ssl.enable": true
                    "mail.smtp.starttls.enable": true
                    "mail.smtp.starttls.required": true
                    "mail.imap.ssl.socketFactory.fallback": false
                protocol: smtps
                default-encoding: UTF-8

            -   host: smtp.exmail.qq.com
                port: 465
                username: testmail@exmail.com
                password: youPassword
                properties:
                    "mail.smtp.auth": true
                    "mail.smtp.ssl.enable": true
                    "mail.smtp.starttls.enable": true
                    "mail.smtp.starttls.required": true
                    "mail.imap.ssl.socketFactory.fallback": false
                protocol: smtps
                default-encoding: UTF-8

参考资料

SpringBoot多邮件源发送邮件

springboot-dev-tools