原型模式

广告模板代码
package test;

public class AdvTemplate {
    
    private String advSubject = "XX银行国庆信用卡抽奖活动";
    
    private String advContext = "国庆抽奖活动通知：只要刷卡就送你一百万！...";

    public String getAdvSubject() {
        return advSubject;
    }

    public String getAdvContext() {
        return advContext;
    }
    
    
}
邮件类代码
package test;

public class Mail implements Cloneable {
    
    private String receiver;
    
    private String subject;
    
    private String appellation;
    
    private String context;
    
    private String tail;
    
    public Mail(AdvTemplate advTemplate) {
        
        this.context = advTemplate.getAdvContext();
        this.subject = advTemplate.getAdvSubject();
        
    }   

    @Override
    protected Object clone() throws CloneNotSupportedException {
        
        Mail mail = null;
        
        try {
            mail = (Mail)super.clone();
        } catch(CloneNotSupportedException e) {
            e.printStackTrace();
        }
        return mail;
    }

    public String getReceiver() {
        return receiver;
    }

    public void setReceiver(String receiver) {
        this.receiver = receiver;
    }

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public String getAppellation() {
        return appellation;
    }

    public void setAppellation(String appellation) {
        this.appellation = appellation;
    }

    public String getContext() {
        return context;
    }

    public void setContext(String context) {
        this.context = context;
    }

    public String getTail() {
        return tail;
    }

    public void setTail(String tail) {
        this.tail = tail;
    }
    
}

package test;

import java.util.ArrayList;

public class Thing implements Cloneable {

    private ArrayList<String> arrayList = new ArrayList<String>();

    @Override
    protected Thing clone() throws CloneNotSupportedException {
        
        Thing thing = null;
        
        try {
            thing = (Thing)super.clone();
            this.arrayList = (ArrayList<String>)this.arrayList.clone();
        } catch(CloneNotSupportedException e) {
            e.printStackTrace();
        }
        
        return thing;
        
    }   
    
    public void setValue(String value) {
        this.arrayList.add(value);
    }
    
    public ArrayList<String> getValue() {
        return this.arrayList;
    }
        
}
场景类代码
package test;

import java.util.Random;

public class Client {
    
    private static int MAX_COUNT = 6;
    
    public static void main(String[] args) {
        
        int i = 0;
        Mail mail = new Mail(new AdvTemplate());
        mail.setTail("XX银行版权所有");
        
        while( i < MAX_COUNT) {
            Mail cloneMail;
            try {
                cloneMail = (Mail)mail.clone();
                cloneMail.setAppellation(getRandString(5) + " 先生（女生）");
                cloneMail.setReceiver(getRandString(5) + "@" + getRandString(8) + ".com");
                sendMail(cloneMail);

            } catch (CloneNotSupportedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
            i ++;
        }
        
        Thing thing = new Thing();
        thing.setValue("张三");
        
        try {
            Thing cloneThing = thing.clone();
            cloneThing.setValue("李四");
        } catch (CloneNotSupportedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        System.out.println(thing.getValue());
        
    }
    
    public static void sendMail(Mail mail) {
        
        System.out.println("标题：" + mail.getSubject() + "\t收件人：" + mail.getReceiver() + "\t...发送成功！");
        
    }
    
    public static String getRandString(int maxLength) {
        
        String source = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
        StringBuffer sb = new StringBuffer();
        
        Random rand = new Random();
        
        for(int i = 0; i < maxLength; i ++) {
            sb.append(source.charAt(rand.nextInt(source.length())));
        }
        
        return sb.toString();
    }

}