批改密码在什么地方做

修改密码在什么地方做
做网站登录系统：

做了登录后可表示的设定页面，里面有修改密码功能，写修改密码时是在AccountService里写，还是在设定页面下面写。
请教（例如同样密码才可以修改。。。），请教

[解决办法]
写业务逻辑 在service或action中 写 都可以啊

Java code

 /**     * 修改密码     * @return     */    @Action(value="modifyPassword",results={@Result(name="modifyFail",location="/system/user/user-modifyPassword.jsp"),    @Result(name="modifySuccess",location="/system/index.jsp")})    public String modifyPassword(){        String message = "";        try{            if(txtoldPasswd==null || txtoldPasswd.equals("")){                message = "您输入的旧密码为空！";                throw new Exception(message);            }else if(txtnewPasswd==null || txtnewPasswd.equals("")){                message = "您输入的新密码为空！";                throw new Exception(message);            }else if(txtrepeatpassword==null || txtrepeatpassword.equals("")){                message = "您输入的重复密码为空！";                throw new Exception(message);            }else if(!txtnewPasswd.equals(txtrepeatpassword)){                message = "您输入的两次新密码不一致！";                throw new Exception(message);            }        }catch (Exception e) {            addActionMessage(message);            logger.error(message);            return "modifyPassword";        }        try {            //首先判断用户的旧密码是否正确            User user = (User)Struts2Utils.getSession().getAttribute("loginuser");            if(!user.getPassword().equals(txtoldPasswd)){                addActionMessage("抱歉，您输入的旧密码错误！");                return "modifyPassword";            }else{   //然后修改密码                user.setPassword(txtrepeatpassword);                securityEntityManager.saveUser(user);                Struts2Utils.getResponse().getWriter().print("<script>top.location.href='" + contextPvd.getAppCxtPath() +                         "/login!goIndex.action'</script>");                return null;            }            } catch (Exception e) {            addActionMessage("密码修改失败！");            logger.error("密码修改失败！{}",e.getMessage());        }        return "modifyPassword";    }
[解决办法]
Changes page
Java code
public Navigation run() throws Exception {        Account ac = sessionScope("account");        System.out.println("Key:" + ac.getKey());        Account stored = service.get(ac.getId());        System.out.println("Key:" + stored.getKey());        Account ac2 = new Account();        BeanUtil.copy(request, ac2);        stored.setName(ac2.getName());        stored.setPassword(ac2.getPassword());        System.out.println("Paass:" + ac2.getPassword());        if (service.update(stored)) {            return forward("...");        } else {            return forward("...");        }    }