3.本地存储localStorage

          实现登录后将token存入本地localStorage，在调用系统业务接口时从localStorage中取出token进行接口鉴权后调用

案例：

        1.登录时将用户名和token存入本地存储localStorage

$(\'#login\').click(function () {var user = $(\'#user\').val();var passwd = $(\'#password\').val();$.ajax({url: \'/login/\',type: \'post\',data: {\'username\': user, \'password\': passwd},async: true,success: function (result) {localStorage.setItem(\'token\', result.data.data.token);#存登录获得的tokenlocalStorage.setItem(\'user\', result.data.data.username);#存登录的用户名,方便后台管理系统展示用户名window.location.replace(\"/home/count/\");},error:function (result)  {var str = JSON.stringify(result.responseJSON.msg);toa