How to operate json with jquery

Jquery method of operating json: 1. "$.parseJSON(jsonString)" 2. "$.getJSON(url, data, success)"; 3. "$.each(obj, callback)"; 4. "$.ajax()".

In jQuery, you can use the following methods to manipulate JSON data:

1. `$.parseJSON(jsonString)`: Convert a Convert JSON string to JavaScript object. For example:

var jsonString = '{"name":"John", "age":30, "city":"New York"}';
var jsonObject = $.parseJSON(jsonString);
console.log(jsonObject.name); // 输出：John

2. `$.getJSON(url, data, success)`: Get JSON data from the server and convert it into a JavaScript object. For example:

$.getJSON("data.json", function(data) {
  console.log(data.name); // 输出：John
});

3. `$.each(obj, callback)`: Traverse a JavaScript object or array and execute the callback function on each element. For example:

var jsonObject = {"name":"John", "age":30, "city":"New York"};
$.each(jsonObject, function(key, value) {
  console.log(key + ": " + value);
});

4. `$.ajax()`: Use AJAX to get JSON data from the server and perform more complex operations. For example:

$.ajax({
  url: "data.json",
  dataType: "json",
  success: function(data) {
    console.log(data.name); // 输出：John
  }
});

These are some commonly used jQuery methods for manipulating JSON data. Depending on your specific needs, you can choose a method that suits you to manipulate JSON data.

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