登录SSM

 <select id="login" resultMap="BaseResultMap" parameterType="com.spy.user.model.User">
  	select <include refid="Base_Column_List" /> from t_user where   loginName=#{loginname} and password =#{password} or
	phone=#{phone} and password =#{password}
 	or  mail =  #{mail} and password =#{password}
  </select>

 Service层

public boolean login(User user, HttpServletRequest request) {
		user = userMapper.login(user);
		if(user != null){
			request.getSession().setAttribute("user", user);
			return true;
		}else{
			return false;
		}
	}

 controller

* 功能：登录进去
	 * 时间：2015年12月2日
	 */
	@RequestMapping(value="v_login.action")
	public void v_login(HttpServletRequest request,HttpServletResponse response,User user,String name,String pwd){
		user.setPassword(pwd);
		user.setLoginname(name);
		user.setMail(name);
		user.setPhone(name);
		boolean flag = userService.login(user, request);
		try {
			response.getWriter().write(flag+"");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}