设计模式----原型模式（prototype pattern）

AdvTemplate.java代码如下：

package com.designPattern.prototype;

public class AdvTemplate {

	private String advSubject = "title";

	private String advContext = "context";

	public String getAdvSubject() {
		return advSubject;
	}

	public String getAdvContext() {
		return advContext;
	}

}

Mail.java代码如下：

 package com.designPattern.prototype;

/**
 * 
 * @author yangjianzhou
 * 使用原型模式时需要注意的几个问题：
 * 1.对象拷贝时，类的构造函数是不会被执行的
 * 2.浅拷贝与深拷贝的问题
 * 3.clone与final的关系
 */
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
	public Mail clone(){
		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;
	}

}

Client.java代码如下：

package com.designPattern.prototype;

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 = mail.clone();
			cloneMail.setAppellation(getRandString(5)+"先生（女士）");
			cloneMail.setReceiver(getRandString(5)+"@"+getRandString(8)+".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");
	}

	public static String getRandString(int maxLength){
		String source = "abcdefghijklmnopqrstuvwxyz";

		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();
	}

}

运行结果如下：

标题：title	收件人：[email protected]	发送成功
标题：title	收件人：[email protected]	发送成功
标题：title	收件人：[email protected]	发送成功
标题：title	收件人：[email protected]	发送成功
标题：title	收件人：[email protected]	发送成功
标题：title	收件人：[email protected]	发送成功