jQuery Ajax方法调用两次

Question

I have this function in a jsp which calls a struts2 action. But it calls it twice. Why?

JSP

    $("#inputField").change(function()
    {
        var inputField= $("#inputField").val();
        if(inputField !== '')
        {
            var url = 'myUrl';
            $.getJSON(url, function(retVal)
            {
                $.each(retVal.retList, function(index, element)
                {
                    console.log(element.name);
                });  
            });
        }
    });

Struts2 Action

public String getJSON() throws Exception
{
     System.out.println("Method Executed");
}

When this ajax call returns, i get this

Method Executed
Method Executed

How can i make this execute only once?

Answer 1

您可能使用JSON插件，并且正在调用所有以“ get”开头的方法，以尝试对其进行序列化以进行输出。尝试重命名方法名称

Answer 2

Make sure that you only register the the 'change' event once. The reason for the double ajax call is probably that you are adding a change listener twice in the code. Take a look here .