忘记密码 通过邮件找回

@Action("send")
public String sendMail() {
    accountServices.sendForgetMail(email);
    return SUCCESS;
}

// 通过数据库查询输入框中email的账号,有了这个账号再真正发送,
//    在线程里的属性要写成常量
    public void sendForgetMail(final String email) {
        
        Account account = accountDao.findByemail(email);
        
        if(account != null) {
            /* 在发送的邮件中,要传入所找回密码的账户的邮箱,和token
                token的作用是唯一性,防止修改url中的邮箱来乱改密码
                */
            final String token = UUID.randomUUID().toString();
                /* 放入缓存中,5分钟后失效 */
            Cache.put("forget:"+email, 300, token);
            /* 发邮件是个过程,不能等发送完在跳转,将发送放入一个线程 */
            Thread thread = new Thread(new Runnable() {
                
                public void run() {

                    
                    HtmlEmail mail = new HtmlEmail();
                    //设置主机服务器地址
                    mail.setHostName("smtp.126.com");
                    mail.setAuthentication("kaishengit", "p@ssw@rd");
                    // 是否需要验证
                    mail.setTLS(true);
                    mail.setCharset("UTF-8");
                    
                    try {
                    // 发件人 
                        mail.setFrom("kaishengit@126.com");
                        // 主题
                        mail.setSubject("密码找回邮件");
                        // 内容 
                        mail.setHtmlMsg("点击此链接找回密码：<a href=\"http://localhost/forget/validate.action?email="+email+"&token="+token+"\">重置密码</a>");
                        mail.addTo(email);
                        mail.send();
                        
                    } catch (EmailException e) {
                        e.printStackTrace();
                    }
                }
            });
            
            thread.start();
        }
        
    }

// 缓存写成工具类 
public class Cache {

    private static MemcachedClient client = buildeClient();

    private static MemcachedClient buildeClient() {
        try {
            return new MemcachedClient(AddrUtil.getAddresses("127.0.0.1:11211"));
        } catch (IOException e) {
            throw new RuntimeException("MemcachedClient 获取错误", e);
        }
    }
    
    public static void put(String key,int time,Object value) {
        client.add(key, time, value);
    }
    
    public static Object get(String key) {
        return client.get(key);
    }
    
    public static void remove(String key) {
        client.delete(key);
    }
    
    
}

@Action("validate")
public String callbackToken() {
account = accountServices.validateMailAndToken(email,token);
    if(account == null) {
        return INPUT;
    }
    return SUCCESS;
}

//service中 
public Account validateMailAndToken(String email, String token) {
        String cacheToken = (String) Cache.get("forget:"+email);
        if(cacheToken == null) {
            System.out.println("获取不了token");
            return null;
        } else {
            if(token.equals(cacheToken)) {
                Cache.remove("forget:"+email);
                return accountDao.findByemail(email);
            } else {
                System.out.println("两个token不一致");
                return null;
            }
        }
    }