传出：
var orderData=[
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]
sessionStorage.setItem('缓存名称', JSON.stringify(orderData))；
接收：
const dataB = JSON.parse(sessionStorage.getItem('缓存名称'));