前言

借用hutool工具，实现多账号发送邮件

相关实现

maven依赖

Hutool对所有第三方都是可选依赖，因此在使用MailUtil时需要自行引入第三方依赖。

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.7.15</version>
</dependency>

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

简化需求场景

由于hutool中MailAccount没有合适得构造方法构建对象，我就创建了一个子类MailAccountSon继承MailAccount

在构建MailAccountSon时并构建MailAccount的相关属性值

当然你可以直接new MailAccount()，但是我觉得麻烦并且和账户耦合度很高

官方：

除了使用配置文件定义全局账号以外，MailUtil.send方法同时提供重载方法可以传入一个MailAccount对象，这个对象为一个普通Bean，记录了邮件服务器信息。

MailAccount account = new MailAccount();
account.setHost("smtp.yeah.net");
account.setPort("25");
account.setAuth(true);
account.setFrom("hutool@yeah.net");
account.setUser("hutool");
account.setPass("q1w2e3");

MailUtil.send(account, CollUtil.newArrayList("hutool@foxmail.com"), "测试", "邮件来自Hutool测试", false);

 talk is cheap，look my code！

代码实现

MailAccountSon类，其中的构造方法根据需求添加，如果你是企业邮箱，参考hutool定义对应的构造函数

/**
 * @author Xuewei.Zhang
 * @date 2022/11/24
 */
public class MailAccountSon extends MailAccount {

    public MailAccountSon(String host, Integer port, Boolean auth, String from, String user, String pass) {
        super.setHost(host);
        super.setPort(port);
        super.setAuth(auth);
        super.setFrom(from);
        super.setUser(user);
        super.setPass(pass);
    }

    public MailAccountSon(String host, Integer port, Boolean auth, String from, String pass) {
        super.setHost(host);
        super.setPort(port);
        super.setAuth(auth);
        super.setFrom(from);
        super.setPass(pass);
    }

    public MailAccountSon(String from, String pass) {
        super.setFrom(from);
        super.setPass(pass);
    }
}

SYS_EMAIL_MAP里面存放了我多个邮件账号实例，我将使用他们发送邮件

public interface SysConstants {
 
    String EMAIL_126 = "126";
    String EMAIL_qq = "qq";
    // 邮件服务器
    Map<String, MailAccountSon> SYS_EMAIL_MAP = new HashMap<String, MailAccountSon>() {{
        put(EMAIL_126,new MailAccountSon("zhangxuewei0303@126.com","CTLTO***K****J") );
        put(EMAIL_qq,new MailAccountSon("2289998609@qq.com","rp****oo***bhj") );
    }};

}

测试QQ

    public static void main(String[] args) {
        MailAccount mailAccount = SysConstants.SYS_EMAIL_MAP.get(SysConstants.EMAIL_qq);
        String msg = MailUtil.send(mailAccount, CollUtil.newArrayList("1263944101@qq.com"), "测试", "邮件来自erp_cloud测试", false);
        log.info(msg);
    }

打印信息

Connected to the target VM, address: '127.0.0.1:13216', transport: 'socket'
16:57:58.834 [main] INFO com.zxw.common.web.util.EmailUtil - <2040352617.1.1669280277966@LAPTOP-ORGH9L27.mshome.net>
Disconnected from the target VM, address: '127.0.0.1:13216', transport: 'socket'

测试126

    public static void main(String[] args) {
        MailAccount mailAccount = SysConstants.SYS_EMAIL_MAP.get(SysConstants.EMAIL_126);
        String msg = MailUtil.send(mailAccount, CollUtil.newArrayList("1263944101@qq.com"), "测试", "邮件来自erp_cloud测试", false);
        log.info(msg);
    }

打印信息

Connected to the target VM, address: '127.0.0.1:1431', transport: 'socket'
17:18:13.025 [main] INFO com.zxw.common.web.util.EmailUtil - <2040352617.1.1669281492247@LAPTOP-ORGH9L27.mshome.net>
Disconnected from the target VM, address: '127.0.0.1:1431', transport: 'socket'