Javascript 访问包含数组的json对象

我对json非常陌生，似乎无法正确访问它

例如，我尝试获取“username”，以便为AngularJS项目创建模拟

$httpBackend.expectGET('user.json').
  respond(Users[ { Username: "bjarnipolo"}, { Username: "yolo"} ]);


{
  "Users":[
      {
      "UserId":1,
      "Username":"bjarnipolo",
      "Password":null,
      "FirstName":"Bjarni Póló",
      "LastName":"Súkkulaðisson",
      "Ssn":"2412813539",
      "Email":"bjarnip08@ru.is",
      "Phone":"6903066",
      "Roles":"Stjornandi",
      "JobTitle":"Scrum Master",
      "ImageUrl":"http://us.cdn4.123rf.com/168nwm/nruboc/nruboc0802/nruboc080200034/2557282-a-small-cute-dog-playing-basketball-over-a-black-background.jpg",
      "IsActive":true
      },
      {
      "UserId":2,
      "Username":"yolo",
      "Password":null,
      "FirstName":"Brynjólfur YOLO",
      "LastName":"Hermannsson",
      "Ssn":"0106752040",
      "Email":"Binni@example.com",
      "Phone":"8995555",
      "Roles":"Notandi",
      "JobTitle":"Team member",
      "ImageUrl":"http://us.cdn4.123rf.com/168nwm/nruboc/nruboc0802/nruboc080200034/2557282-a-small-cute-dog-playing-basketball-over-a-black-background.jpg",
      "IsActive":true
      }
  ]
}

---

我想我找到了一个解决办法来得到你想要的

您可以使用

newrequest.JSON

。请求应如下所示：

new Request.JSON({
 url: '/echo/json/',
 data: {
    json: JSON.encode({
          "Users":[
              {
              "UserId":1,
              "Username":"bjarnipolo",
              "Password":null,
              "FirstName":"Bjarni Póló",
              "LastName":"Súkkulaðisson",
              "Ssn":"2412813539",
              "Email":"bjarnip08@ru.is",
              "Phone":"6903066",
              "Roles":"Stjornandi",
              "JobTitle":"Scrum Master",
              "ImageUrl":"http://us.cdn4.123rf.com/168nwm/nruboc/nruboc0802/nruboc080200034/2557282-a-small-cute-dog-playing-basketball-over-a-black-background.jpg",
              "IsActive":true
              },
              {
              "UserId":2,
              "Username":"yolo",
              "Password":null,
              "FirstName":"Brynjólfur YOLO",
              "LastName":"Hermannsson",
              "Ssn":"0106752040",
              "Email":"Binni@example.com",
              "Phone":"8995555",
              "Roles":"Notandi",
              "JobTitle":"Team member",
              "ImageUrl":"http://us.cdn4.123rf.com/168nwm/nruboc/nruboc0802/nruboc080200034/2557282-a-small-cute-dog-playing-basketball-over-a-black-background.jpg",
              "IsActive":true
              }
         ]
     }),
 },
 onSuccess: function(response) {
    var jsonObj = response;
    alert(jsonObj.Users[1].Username);

    jsonObj.Users[1].Username = "dsds";

    alert(jsonObj.Users[1].Username);
 }
}).send();

---

这是答案。

我想我找到了一个解决方案来满足您的需求

您可以使用

newrequest.JSON

。请求应如下所示：

new Request.JSON({
 url: '/echo/json/',
 data: {
    json: JSON.encode({
          "Users":[
              {
              "UserId":1,
              "Username":"bjarnipolo",
              "Password":null,
              "FirstName":"Bjarni Póló",
              "LastName":"Súkkulaðisson",
              "Ssn":"2412813539",
              "Email":"bjarnip08@ru.is",
              "Phone":"6903066",
              "Roles":"Stjornandi",
              "JobTitle":"Scrum Master",
              "ImageUrl":"http://us.cdn4.123rf.com/168nwm/nruboc/nruboc0802/nruboc080200034/2557282-a-small-cute-dog-playing-basketball-over-a-black-background.jpg",
              "IsActive":true
              },
              {
              "UserId":2,
              "Username":"yolo",
              "Password":null,
              "FirstName":"Brynjólfur YOLO",
              "LastName":"Hermannsson",
              "Ssn":"0106752040",
              "Email":"Binni@example.com",
              "Phone":"8995555",
              "Roles":"Notandi",
              "JobTitle":"Team member",
              "ImageUrl":"http://us.cdn4.123rf.com/168nwm/nruboc/nruboc0802/nruboc080200034/2557282-a-small-cute-dog-playing-basketball-over-a-black-background.jpg",
              "IsActive":true
              }
         ]
     }),
 },
 onSuccess: function(response) {
    var jsonObj = response;
    alert(jsonObj.Users[1].Username);

    jsonObj.Users[1].Username = "dsds";

    alert(jsonObj.Users[1].Username);
 }
}).send();

---

这是答案。

f.x是什么意思？你是如何实现你的目标的？请改进您的问题以获得更多有用的答案。回答（{用户[0]。用户名：“bjarnipolo”}）；给我错误：未捕获语法错误：意外标记[@ArniReynir尝试创建一个新用户，然后NewUser=Users[0]；，NewUser.UserName=“dsddsd”；用户[0]=NewUser..尝试这个{Users[0]。UserName:“bjarnipolo”}是创建新对象的语法。“Users[0].UserName”是无效的属性名称嗨，请查看此链接。“f.x”是什么意思是？你是如何尝试实现你的目标的？请改进你的问题以获得更多有用的答案。回答（{Users[0]。用户名：“bjarnipolo”}）；给我错误：未捕获语法错误：意外标记[@ArniReynir尝试创建一个新用户，然后NewUser=Users[0]；，NewUser.Username=“dsddsd”；用户[0]=NewUser..试试这个{Users[0].Username:“bjarnipolo”}是创建新对象的语法。而“Users[0].Username”是无效的属性名称。请查看此链接。