laravel“csrf”问题“Illuminate \ Session \ TokenMismatchException”

In Laravel I'm getting a "csrf" issue "Illuminate \ Session \ TokenMismatchException"

Route::group(array('before'=>'guest'),function()
{
    Route::get('/user/create',array('uses'=>'UserController@getCreate'));
    Route::get('/user/login',array('uses'=>'UserController@getLogin','as'=>'postCreate'));

    Route::group(array('before'=>'csrf'),function()
    {   
        Route::get('/user/create','UserController@postCreate');
        Route::get('/user/login','UserController@postLogin');
    });
});

that is controller

class UserController extends BaseController{
public function getCreate()
{
    //return View::make('hello');
    return View::make('user.register');
}

that is view

<div class="container">
<h1>Register</h1>
<form role="form" method="post" action="{{ URL::route('postCreate')}}">
    <div class="form-gourp">
        <label for="username">Username: </label>
        <input id="username" name="username" type="text" class="form-control" />
    </div>
    <div class="form-gourp">
        <label for="password">Password: </label>
        <input id="password" name="password" type="text" class="form-control" />
    </div>
    <div class="form-gourp">
        <label for="username">confirm Password: </label>
        <input id="cpassword" name="cpassword" type="text" class="form-control" />
    </div>
    {{form::token()}}
    <div class="form-gourp">
         <input type="submit" value="register" class="btn btn-default"/>
    </div>
</form>

When I add {{form::token }}, it shows the error "Illuminate \ Session \ TokenMismatchException"

You are wrong in your routes.

Route::group(array('before'=>'csrf'),function()
{   
    Route::get('/user/create','UserController@postCreate');
    Route::get('/user/login','UserController@postLogin');
});

Those should be post, like the following

Route::group(array('before'=>'csrf'),function()
{   
    Route::post('/user/create','UserController@postCreate');
    Route::post('/user/login','UserController@postLogin');
});

Read more about CSRF on wiki and laravel doc.

Use {{ Form::open() }} and {{ Form::close() }} rather than the <form> tags