javascript - 如何将 javascript 对象数组放入 cookie 中？

Question

是否可以放入 Javascript 对象数组并再次检索它？有简单的方法吗？在将它们存储在 cookie 中之前，我是否必须将其序列化为字符串？

下一个代码显示了我想要实现的目标:

writeCookie("items",[new Item(3,15.00,2,"GR-10 Senderos"),new Item(4,45,1,"GR-10 Senderos<br/>GR 88 Senderos del Jarama<br/>Camino del Cid")],5*365);
$(document).ready(function() {  
    var items = readCookie("items");
});

function writeCookie(name, value, days) {
  // By default, there is no expiration so the cookie is temporary
  var expires = "";

  // Specifying a number of days makes the cookie persistent
  if (days) {
    var date = new Date();
    date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
    expires = "; expires=" + date.toGMTString();
  }

  // Set the cookie to the name, value, and expiration date
  document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {
  // Find the specified cookie and return its value
  var searchName = name + "=";
  var cookies = document.cookie.split(';');
  for(var i=0; i < cookies.length; i++) {
    var c = cookies[i];
    while (c.charAt(0) == ' ')
      c = c.substring(1, c.length);
    if (c.indexOf(searchName) == 0)
      return c.substring(searchName.length, c.length);
  }
  return null;
}

function eraseCookie(name) {
  // Erase the specified cookie
  writeCookie(name, "", -1);
}   

提前致谢!

Answer 1

我会将其 JSON 编码为字符串，然后将其存储在 cookie 中。