Login 页面

1、jsp

<script type="text/javascript">
	function doLogin() {
		if (trim($('#username').val()) == "") {
			showmsg(0, "请输入用户名");
			return;
		}
		if (trim($('#password').val()) == "") {
			showmsg(0, "请输入密码");
			return;
		}
		 $.ajax({
			url : "${contextPath}/web/login.htm",
			data : $("#loginForm").serialize(),
			cache : false,
			success : function(xmlHttp) {
				var res = xmlHttp;
				if (res.errorMessage && res.errorMessage != "") {
					showmsg(0, res.errorMessage);
				} else {
					if (str_isblank(res.status)) {
						showmsg(1, "登录成功！");
						window.setTimeout("window.location='${contextPath}/web/toindex.htm'", 1500);
					} else {
						showmsg(1, "登录成功！");
						var fromUrl = res.status;
						location.href = fromUrl;
					}
				}
			}
		});
		
	}

</script>

　　

2.controller

@RequestMapping("/tologin.htm")
	public String tologin(HttpSession session, RequestParameter param) {

		if (!StringUtils.isBlank(param.getBackurl())) {
			if (httpSession.getAttribute("NOLOGIN_SHOP_URL") != null) {
				httpSession.removeAttribute("NOLOGIN_SHOP_URL");
			}
			httpSession.setAttribute("NOLOGIN_SHOP_URL", param.getBackurl());
			if (param.getBackurl().endsWith("logout.htm"))
				httpSession.setAttribute("NOLOGIN_SHOP_URL", "");

		}
		return "web/login";
	}
	
	@RequestMapping("/login.htm")
	@ResponseBody
	public Response login(Model model, RequestParameter param, InfoUser infoUser) {

		Response res = new Response();

		SessionUser suser = null;
		if (httpSession.getAttribute(WebConstants.SESSION_USER_KEY) != null) {
			suser = new SessionUser();
			suser = (SessionUser) httpSession.getAttribute(WebConstants.SESSION_USER_KEY);
		}

		if (null == suser || StringUtils.isBlank(suser.getUsername())) {

			// #0: 正常；
			// #1: 用户名不存在；
			// #2：密码不正确；
			Integer ret = webService.loginInfoUser(infoUser);
			if (ret == 1) {
				res.setErrorMessage("登录失败，用户名不存在。");
			} else if (ret == 2) {
				res.setErrorMessage("登录失败，密码不正确。");
			} else { // 登录成功，写session

				InfoUser infoUser1 = webService.getInfoUserByName(infoUser.getUsername());

				suser = new SessionUser();
				suser.setUserid(infoUser1.getUserid());
				suser.setUsername(infoUser1.getUsername());
				//suser.setPhonenum(infoUser1.getPhonenum());

				httpSession.setAttribute(WebConstants.SESSION_USER_KEY, suser);
				
				if (httpSession.getAttribute("NOLOGIN_SHOP_URL") != null) {
					String backurl = (String) httpSession.getAttribute("NOLOGIN_SHOP_URL");

					res.setStatus(backurl);
					httpSession.removeAttribute("NOLOGIN_SHOP_URL");
				}
			}
		}

		return res;
	}