javascript 如何将数据传递给 AJAX 调用

How to pass data to AJAX call

提问by AbtPst

Can anyone tell me how to pass data to the jsp making the AJAX call ? This is what I am trying:

谁能告诉我如何将数据传递给进行 AJAX 调用的 jsp？这就是我正在尝试的：

Here is my AJAX call:

这是我的 AJAX 调用：

     $.get("gridedit.jsp", { before: "row", time: "2pm" })
               .done(function(data) {
                 alert("Data Loaded: " + data);
               });

here is my gridedit.jsp

这是我的 gridedit.jsp

    <% String b=request.getParameter("before");

    if(b.equalsIgnoreCase("row"))
     {
System.out.println("ROW ROW ROW your boat");
        out.println("bummer");
    } %>

i want to store the value returned from gridedit.jsp into a javascript variable. How should I do this ?

我想将从 gridedit.jsp 返回的值存储到一个 javascript 变量中。我该怎么做？

please help

请帮忙

thanks

谢谢

EDIT:

编辑：

here is what i also tried

这是我也尝试过的

    $.ajax({
                url: "gridedit.jsp",

                async: true,
                cache: false,
                type:"GET",
                data: {
                    before:'row',
                      },
                      error: function(msg) { alert(msg); },
                      complete: function (xhr, status) { alert('complete: '+status); }

            });

i get two alerts, the first one says

我收到两个警报，第一个说

    [object][object]

and the second one says

第二个说

    error

can anyone figure out whats going on ?

谁能弄清楚发生了什么？

please help

请帮忙

thanks

谢谢

Errors;

错误；

so here i what i tried

所以我在这里尝试过

      $.ajax({
                url: "gridedit.jsp",
                //dataType: "json",
                async: true,
                cache: false,
                type:"GET",
                data: {
                    before:'row'
                      },
                      error: function( jqXHR, textStatus, errorThrown ) { alert(jqXHR);
                      alert(textStatus);
                      alert(errorThrown);},
                      complete: function (xhr, status) { 
                          alert('jqXHR:'+xhr);
                          alert('complete: '+status); }

            });

i get the following alerts in order:

我按顺序收到以下警报：

jqXHR: [object][object]

jqXHR: [对象][对象]

testStatus:

测试状态：

      parseerror

errorthrown:

错误抛出：

      Unexpected end of input

can anyone please help me in solving this ? my gridedit.jsp does this->

谁能帮我解决这个问题？我的 gridedit.jsp 是这样做的->

          <%String b=request.getParameter("before");
          System.out.println("b is here !" + b);
                        out.println("HELLO");%>

please help

请帮忙

thanks

谢谢

回答by Shade

Try number two:

尝试第二个：

I have an ajax request that looks like this:

我有一个 ajax 请求，如下所示：

$.ajax({
    url: "/someplace",
    dataType: "json",
    async: true,
    cache: false,
    data: {
        number0: 0,
        key: littleKey
    },
    success: function(data, status)
    {
        alert(data);
    }
});

and it works as is expected.

它按预期工作。

And you can specify get with type : "GET"in with the other options.

您可以使用type : "GET"其他选项指定 get with in 。

Maybe try having your .jsp print some data no matter what, and also print what data it is receiving.

也许尝试让您的 .jsp 无论如何打印一些数据，并打印它正在接收的数据。

回答by Shade

It is in a variable, the data variable in the anonymous function passed to .done()

它在一个变量中，匿名函数中的数据变量传递给 .done()

Whatever you need the data returned by gridedit.jsp to do, the easiest way to have anything done with it is to use it in that function. Right now all you are doing with it is making a popup containing the returned data.

无论您需要 gridedit.jsp 返回的数据做什么，处理它的最简单方法就是在该函数中使用它。现在你所做的就是制作一个包含返回数据的弹出窗口。