<label>用户名</label><input id="username" name="username" value="${u.username}">
	<label>密码</label><input id="password" name="password" value="${u.password}">
	<span id="error"></span>
	<br><br><br><br><br>
	<input type="button" value="登录" onclick="return loginyz(this)"/> 

function loginyz(){
		var n = $("#username").val();
    	if(n == "" || n==null){
    		alert("用户名不能为空");
    		return false;
    	}	
    	var p = $("#password").val();
    	if(p == "" || p==null){
    		alert("密码不能为空");
    		return false;
    	}
    	
    	$.ajax({  
            type:"post",  
            url:"<%=basePath%>user/login",
            dataType:"html",    
            data:{"username":n,"password":p},
            error:function(){  
                alert("请求失败，网络异常")  
                console.log(data);  
            },  
            success:function(result){  
               if(result == "error"){
            	  $("#error").html("用户名或密码错误")
               }else{
            	  window.location="<%=basePath%>user/index"
               }
               
            }  
        });  
    	
	}    

@RequestMapping("/login")
	public void load(HttpServletRequest request,HttpServletResponse response,Model model,String username,String password)
			throws IOException, GeneralSecurityException {
		HttpServletRequest servletRequest = (HttpServletRequest) request;
   			 HttpSession session = servletRequest.getSession();
		System.out.println("------------------------------------------"); 
		System.out.println("前台输入的用户名："+username+";"+"密码："+password); 
		User u = userService.getByUsername(username);
		String result = "OK";
		if(u == null || !u.getPassword().equals(password)) {
			result = "error";
		}else {
			session.setAttribute("username", username);
		}
		response.getWriter().write(result); 
	}