Javascript 当JSON对象为name而非原子时，如何从JSON中提取数据_Javascript

Javascript 当JSON对象为name而非原子时，如何从JSON中提取数据

javascript

Javascript 当JSON对象为name而非原子时，如何从JSON中提取数据,javascript,Javascript,下面是一个使用Xstream创建的简单JSON对象。它是一个有效的JavaScript对象。实际上，我想问如何访问第一人称信息，如id、用户名、密码等。但当我在浏览器中查看此文件时，显示的网页没有显示“21”。我希望该页面应该显示21 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title></title>

下面是一个使用Xstream创建的简单JSON对象。它是一个有效的JavaScript对象。实际上，我想问如何访问第一人称信息，如id、用户名、密码等。但当我在浏览器中查看此文件时，显示的网页没有显示“21”。我希望该页面应该显示21

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <script>
        var obj = {"records":[
                     {"beans.Person":[
                        {"id":21,"name":"Name21","username":"Username21","password":"password21","age":41,"sex":true},
                        {"id":22,"name":"Name22","username":"Username22","password":"password22","age":42,"sex":true},
                        {"id":23,"name":"Name23","username":"Username23","password":"password23","age":43,"sex":true},
                        {"id":24,"name":"Name24","username":"Username24","password":"password24","age":44,"sex":true},
                        {"id":25,"name":"Name25","username":"Username25","password":"password25","age":45,"sex":true},
                        {"id":26,"name":"Name26","username":"Username26","password":"password26","age":46,"sex":true},
                        {"id":27,"name":"Name27","username":"Username27","password":"password27","age":47,"sex":true},
                        {"id":28,"name":"Name28","username":"Username28","password":"password28","age":48,"sex":true},
                        {"id":29,"name":"Name29","username":"Username29","password":"password29","age":49,"sex":true},
                        {"id":30,"name":"Name30","username":"Username30","password":"password30","age":50,"sex":true}
                       ]
                     }
                    ]
                  } 

          document.write(obj.records[0].beans.Person[0].id);
     </script>
  </head>
  <body>

  </body>
</html>


var obj={“记录”：[
{“beans.Person”：[
{“id”：21，“name”：“Name21”，“username”：“Username21”，“password”：“password21”，“age”：41，“sex”：true}，
{“id”：22，“name”：“Name22”，“username”：“Username22”，“password”：“password22”，“age”：42，“sex”：true}，
{“id”：23，“name”：“Name23”，“username”：“Username23”，“password”：“password23”，“age”：43，“sex”：true}，
{“id”：24，“name”：“Name24”，“username”：“Username24”，“password”：“password24”，“age”：44，“sex”：true}，
{“id”：25，“name”：“Name25”，“username”：“Username25”，“password”：“password25”，“age”：45，“sex”：true}，
{“id”：26，“name”：“Name26”，“username”：“Username26”，“password”：“password26”，“age”：46，“sex”：true}，
{“id”：27，“name”：“Name27”，“username”：“Username27”，“password”：“password27”，“age”：47，“sex”：true}，
{“id”：28，“name”：“Name28”，“username”：“Username28”，“password”：“password28”，“age”：48，“sex”：true}，
{“id”：29，“name”：“Name29”，“username”：“Username29”，“password”：“password29”，“age”：49，“sex”：true}，
{“id”：30，“name”：“Name30”，“username”：“Username30”，“password”：“password30”，“age”：50，“sex”：true}
]
}
]
} 
document.write（对象记录[0].beans.Person[0].id）；

但当我在浏览器中查看此文件时，显示的网页没有显示21。我希望该页面应该显示21

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <script>
        var obj = {"records":[
                     {"beans.Person":[
                        {"id":21,"name":"Name21","username":"Username21","password":"password21","age":41,"sex":true},
                        {"id":22,"name":"Name22","username":"Username22","password":"password22","age":42,"sex":true},
                        {"id":23,"name":"Name23","username":"Username23","password":"password23","age":43,"sex":true},
                        {"id":24,"name":"Name24","username":"Username24","password":"password24","age":44,"sex":true},
                        {"id":25,"name":"Name25","username":"Username25","password":"password25","age":45,"sex":true},
                        {"id":26,"name":"Name26","username":"Username26","password":"password26","age":46,"sex":true},
                        {"id":27,"name":"Name27","username":"Username27","password":"password27","age":47,"sex":true},
                        {"id":28,"name":"Name28","username":"Username28","password":"password28","age":48,"sex":true},
                        {"id":29,"name":"Name29","username":"Username29","password":"password29","age":49,"sex":true},
                        {"id":30,"name":"Name30","username":"Username30","password":"password30","age":50,"sex":true}
                       ]
                     }
                    ]
                  } 

          document.write(obj.records[0].beans.Person[0].id);
     </script>
  </head>
  <body>

  </body>
</html>

您可以复制并粘贴源代码，然后再试一次。它不显示21。如何访问这些值。

使用

JSON.parse（）

从JSON字符串获取javascript对象。你可以得到更多的信息

编辑：

var objectID = obj.records[0]['beans.Person'][0]['id'];

很好的阅读。

使用

JSON.parse（）

从JSON字符串获取javascript对象。你可以得到更多的信息

编辑：

var objectID = obj.records[0]['beans.Person'][0]['id'];

很好的阅读。

您的问题是在标识符

“beans.Person”

中使用

“

，这意味着您必须引用它，如下所示：

obj.records[0]["beans.Person"][0].id

避免使用

文档。除非你有充分的理由并且知道自己在做什么，否则就写
<div id="result"></div>

var obj = {
    "records": [{
        "beans.Person": [{
            "id": 21,
            "name": "Name21",
            "username": "Username21",
            "password": "password21",
            "age": 41,
            "sex": true
        }, {
            "id": 22,
            "name": "Name22",
            "username": "Username22",
            "password": "password22",
            "age": 42,
            "sex": true
        }, {
            "id": 23,
            "name": "Name23",
            "username": "Username23",
            "password": "password23",
            "age": 43,
            "sex": true
        }, {
            "id": 24,
            "name": "Name24",
            "username": "Username24",
            "password": "password24",
            "age": 44,
            "sex": true
        }, {
            "id": 25,
            "name": "Name25",
            "username": "Username25",
            "password": "password25",
            "age": 45,
            "sex": true
        }, {
            "id": 26,
            "name": "Name26",
            "username": "Username26",
            "password": "password26",
            "age": 46,
            "sex": true
        }, {
            "id": 27,
            "name": "Name27",
            "username": "Username27",
            "password": "password27",
            "age": 47,
            "sex": true
        }, {
            "id": 28,
            "name": "Name28",
            "username": "Username28",
            "password": "password28",
            "age": 48,
            "sex": true
        }, {
            "id": 29,
            "name": "Name29",
            "username": "Username29",
            "password": "password29",
            "age": 49,
            "sex": true
        }, {
            "id": 30,
            "name": "Name30",
            "username": "Username30",
            "password": "password30",
            "age": 50,
            "sex": true
        }]
    }]
}

document.getElementById("result").textContent = obj.records[0]["beans.Person"][0].id;


var obj={
“记录”：[{
“beans.Person”：[{
“id”：21，
“名称”：“名称21”，
“用户名”：“用户名21”，
“密码”：“密码21”，
“年龄”：41岁，
“性”：真的吗
}, {
“id”：22，
“名称”：“名称22”，
“用户名”：“用户名22”，
“密码”：“密码22”，
“年龄”：42岁，
“性”：真的吗
}, {
“id”：23，
“名称”：“名称23”，
“用户名”：“用户名23”，
“密码”：“密码23”，
“年龄”：43岁，
“性”：真的吗
}, {
“id”：24，
“名称”：“名称24”，
“用户名”：“用户名24”，
“密码”：“密码24”，
“年龄”：44岁，
“性”：真的吗
}, {
“id”：25，
“名称”：“名称25”，
“用户名”：“用户名25”，
“密码”：“密码25”，
“年龄”：45岁，
“性”：真的吗
}, {
“id”：26，
“名称”：“名称26”，
“用户名”：“用户名26”，
“密码”：“密码26”，
“年龄”：46岁，
“性”：真的吗
}, {
“id”：27，
“名称”：“名称27”，
“用户名”：“用户名27”，
“密码”：“密码27”，
“年龄”：47岁，
“性”：真的吗
}, {
“id”：28，
“名称”：“名称28”，
“用户名”：“用户名28”，
“密码”：“密码28”，
“年龄”：48岁，
“性”：真的吗
}, {
“id”：29，
“名称”：“名称29”，
“用户名”：“用户名29”，
“密码”：“密码29”，
“年龄”：49岁，
“性”：真的吗
}, {
“id”：30，
“名称”：“名称30”，
“用户名”：“用户名30”，
“密码”：“密码30”，
“年龄”：50岁，
“性”：真的吗
}]
}]
}
document.getElementById（“结果”）.textContent=obj.records[0][“beans.Person”][0].id；

在上，您的问题是在标识符“beans.Person”
中使用“
”，这意味着您必须引用它，如下所示：
obj.records[0]["beans.Person"][0].id

避免使用文档。除非你有充分的理由并且知道自己在做什么，否则就写
<div id="result"></div>

var obj = {
    "records": [{
        "beans.Person": [{
            "id": 21,
            "name": "Name21",
            "username": "Username21",
            "password": "password21",
            "age": 41,
            "sex": true
        }, {
            "id": 22,
            "name": "Name22",
            "username": "Username22",
            "password": "password22",
            "age": 42,
            "sex": true
        }, {
            "id": 23,
            "name": "Name23",
            "username": "Username23",
            "password": "password23",
            "age": 43,
            "sex": true
        }, {
            "id": 24,
            "name": "Name24",
            "username": "Username24",
            "password": "password24",
            "age": 44,
            "sex": true
        }, {
            "id": 25,
            "name": "Name25",
            "username": "Username25",
            "password": "password25",
            "age": 45,
            "sex": true
        }, {
            "id": 26,
            "name": "Name26",
            "username": "Username26",
            "password": "password26",
            "age": 46,
            "sex": true
        }, {
            "id": 27,
            "name": "Name27",
            "username": "Username27",
            "password": "password27",
            "age": 47,
            "sex": true
        }, {
            "id": 28,
            "name": "Name28",
            "username": "Username28",
            "password": "password28",
            "age": 48,
            "sex": true
        }, {
            "id": 29,
            "name": "Name29",
            "username": "Username29",
            "password": "password29",
            "age": 49,
            "sex": true
        }, {
            "id": 30,
            "name": "Name30",
            "username": "Username30",
            "password": "password30",
            "age": 50,
            "sex": true
        }]
    }]
}

document.getElementById("result").textContent = obj.records[0]["beans.Person"][0].id;


var obj={
“记录”：[{
“beans.Person”：[{
“id”：21，
“名称”：“名称21”，
“用户名”：“用户名21”，
“密码”：“密码21”，
“年龄”：41岁，
“性”：真的吗
}, {
“id”：22，
“名称”：“名称22”，
“用户名”：“用户名22”，
“密码”：“密码22”，
“年龄”：42岁，
“性”：真的吗
}, {
“id”：23，
“名称”：“名称23”，
“用户名”：“用户名23”，
“密码”：“密码23”，
“年龄”：43岁，
“性”：真的吗
}, {
“id”：24，
“名称”：“名称24”，
“用户名”：“用户名24”，
“密码”：“密码24”，
“年龄”：44岁，
“性”：真的吗
}, {
“id”：25，
“名称”：“名称25”，
“用户名”：“用户名25”，
“密码”：“密码25”，
“年龄”：45岁，
“性”：tru