Javascript 对象 - 无法访问包含“-”的键 [重复]答案

【问题标题】：Javascript Object - Not able to access keys which contain '-' [duplicate]Javascript 对象 - 无法访问包含“-”的键 [重复]
【发布时间】：2012-10-09 18:18:31
【问题描述】：

可能重复：
How do I reference a javascript object property with a hyphen in it?

我有一个以下格式的 Json：

var response1="{" +
                        "\"code\":\"200\"," +
                        "\"requestID\":\"1002\"," +
                        "\"body\":\"[{" +
                        "\\\"author\\\":\\\"sumit\\\"," +
                        "\\\"id\\\":\\\"ABX-002\\\"," +
                        "\\\"title\\\":\\\"How to make Android APK in 2 seconds :)\\\"" +
                        "}," +
                        "" +
                        "{" +
                        "\\\"author\\\":\\\"sumit\\\"," +
                        "\\\"id\\\":\\\"ABX-002\\\"," +
                        "\\\"title\\\":\\\"How to make Android APK in 2 seconds :)\\\"" +
                        "}," +
                        "{"+
                        "\\\"author\\\":\\\"sumit\\\"," +
                        "\\\"id\\\":\\\"ABX-002\\\"," +
                        "\\\"title\\\":\\\"How to make Android APK in 2 seconds :)\\\"" +
                        "}" +
                        "]\"," +
                        "\"headers\":{\"Server\":\"Apache-Coyote/1.1\"," +
                                    "\"Content-Type\":\"text/xml\"," +
                                    "\"Content-Length\":\"131\"," +
                                    "\"Date\":\"Thu, 06 Sep 2012 09:10:26 GMT\"" +
                                    "}" +
                        "}";

我想解析 Content-Type Key 。所以我写了下面的代码来解析这个值：

var jsonResponse = jQuery.parseJSON(response1); 
var contentType  = jsonResponse.headers.Content-Type;

我无法获取 Content-Type 和 Content-Length 的值。任何帮助，将不胜感激。非常感谢

【问题讨论】：

为什么要对正文 JSON 进行双重转义？
嗨，Bergi ...我已将响应作为字符串对象，因此我添加了适当的转义字符以使其成为适当的 Json 字符串。

标签： javascript jquery json

【解决方案1】：

当key不是合法token时，必须使用字符串作为key，使用数组语法：

var contentType  = jsonResponse.headers['Content-Type'];

注意：这不是“JSON 解析”问题，而是标准的 Javascript 对象访问规则。

【讨论】：