public class Mail implements Cloneable {
    private String receiver;
    private String subject;
    private String appellation;
    private String contxt;
    private String tail;

    public Mail(String subject, String contxt) {
        super();
        this.subject = subject;
        this.contxt = contxt;
    }    

    public String getReceiver() {
        return receiver;
    }
    public void setReceiver(String receiver) {
        this.receiver = receiver;
    }
    public String getAppellation() {
        return appellation;
    }
    public void setAppellation(String appellation) {
        this.appellation = appellation;
    }
    public String getTail() {
        return tail;
    }
    public void setTail(String tail) {
        this.tail = tail;
    }
    public String getSubject() {
        return subject;
    }
    public String getContxt() {
        return contxt;
    }

    public Mail clone() {
        Mail mail = null;
        try {
            mail = (Mail) super.clone();
        } catch (CloneNotSupportedException e) {
            // TODO 自动生成的 catch 块
            e.printStackTrace();
        }
        return mail;
    }
    
}

public class ClientDemo {
    private static int MAX_COUNT = 6;
    public static void main(String[] args)
    {
        int i =0;
        Mail mail = new Mail("群发标题","群发内容");
        mail.setTail("群发结尾");
        Random rand = new Random();
        while(i < MAX_COUNT)
        {
            Mail cloneMail = mail.clone();
            cloneMail.setAppellation("尊称"+rand.nextInt(100)+"：");
            cloneMail.setReceiver(rand.nextInt(1000000000)+"@qq.com");
            sendMail(cloneMail);
            i++;
        }
    }
    
    public static void sendMail(Mail mail)
    {
        System.out.println("标题："+mail.getSubject()+"\t收件人："+mail.getReceiver()+"\t.....发送成功");
    }
}