求助：Ajax请求出现404错误

Question

我需要用ajax从数据库的JSP页面中获取一些数据，然后放入div中。

这是我的代码：

$(function() {
    teste();
});

function teste() {
    var v1 = document.getElementById("selCodigo").value;
    alert(v1);

    $.ajax({       
       type : "GET",
       data : "turma="+v1,
       url : "busca-notas.jsp",       
       success : function(resposta){
           alert("DEU CERTO");
       },
       error : function(xhr, ajaxOptions, thrownError){
           alert(xhr.status);
           alert(thrownError);
           document.getElementById("notas").innerHTML = "ERRO";
       }
    });
}

我测试了变量 v1 及其必需的值，在我的JSP页面中：

String turmaSelecionada = request.getParameter("turma");

问题是，除了 xhr.status 所呈现的thrownError和未发现404错误之外，ajax内容没有馈入div。

有人能帮帮我吗？

Answer 1

Either, busca-notas.jsp does not exist, or it is on a different server or path as the HTML calling the Ajax request.

Example: If your HTML and JavaScript is here:

http://www.example.com/somepath/page.html

and your PHP code is here:

http://www.example.com/otherpath/busca-notas.jsp

then you'll Need to use url: "../otherpath/busca-notas.jps". There is an easy way to check: Open your HTML in the browser, remove the last bit of the path, and replace it with "busca-notas.jpg", and see what you're getting.

A 404 also means, your JSP code never gets executed.