$.ajax - 数据类型 [英] $.ajax - dataType

问题描述

有什么区别

contentType: "application/json; charset=utf-8",
dataType: "json",

对比

contentType: "application/json",
dataType: "text",

推荐答案

• contentType 是发送到服务器的 HTTP 标头，指定特定格式.
  示例:我要发送 JSON 或 XML
• dataType 你是在告诉 jQuery 期望什么样的响应.
  需要 JSON、XML 或 HTML 等.默认是让 jQuery 尝试解决.
• contentType is the HTTP header sent to the server, specifying a particular format.
  Example: I'm sending JSON or XML
• dataType is you telling jQuery what kind of response to expect.
  Expecting JSON, or XML, or HTML, etc. The default is for jQuery to try and figure it out.

$.ajax() 文档有完整的描述还有这些.

The $.ajax() documentation has full descriptions of these as well.

在您的特定情况下，第一个是要求 响应 在 UTF-8 中，第二个不在乎.同样，第一个将 response 视为 JavaScript 对象，第二个将其视为字符串.

In your particular case, the first is asking for the response to be in UTF-8, the second doesn't care. Also the first is treating the response as a JavaScript object, the second is going to treat it as a string.

所以第一个是:

success: function(data) {
  // get data, e.g. data.title;
}

第二个:

success: function(data) {
  alert("Here's lots of data, just a string: " + data);
}

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