Ajax-JSON-初学者

The code below "has been" successfully returning the users.json file in an html table. I modified the json, but the code continues to return the original json. I delete the file, then add it back and then it can't find the file. I have cleared what I thought was the browser cache, to no avail.

Question #1: Where does the server "look" for the users.json file on my web server? Question #2: How can I assure I'm getting the latest changes, when the user clicks the button?

 <script>
        function CreateTableFromJSON() {
            $.ajax({
                type: "get",
                url: ***"users.json",***
                dataType: "json",
                success: function (jsonData) {
                    var table = $('table');
                    table.empty();
                    var name = document.getElementById('name').value.toUpperCase();
                    $.each(jsonData, function (key, item) {
                        var table_row = $('<tr>');
                        $.each(item, function (itemKey, itemValue) {
                            if (key == 0) {
                                table.append($('<th>', { html: itemKey }));
                            }
                            if (item.LastName.startsWith(name)) {
                                table_row.append($('<td>', { html: itemValue }));
                            }
                        });

                        table.append(table_row);
                    }
                    );

                },
                error: function () {
                    alert("json not found");
                }
            });
        }

    </script>

 <style>
        th, td, p, input {
            font: 14px Verdana;
        }

        table, th, td {
            border: solid 1px #DDD;
            border-collapse: collapse;
            padding: 2px 3px;
            text-align: left;
        }

        th {
            font-weight: bold;
        }
    </style>

<!DOCTYPE html>
<html>

<head>

</head>

<body>

    <div>
        <input type="button" onclick="CreateTableFromJSON()" value="Create Table From JSON" />
        <input type='text' id='name' placeholder='Search Initial ' />

    </div>
    <p id="showData"></p>
    <table id="tbl"></table>
</body>
</html>

</div>

Not sure what you mean by your first question. It will "look" at whatever location is in your url.

For your second question: you want to turn off browser caching. Add "cache: false", eg

            type: "get",
            url: ***"users.json",***
            dataType: "json",
            cache: false