调用Ajax中的Java方法 [英] Calling a java method in ajax

问题描述

我创造在NetBeans IDE JSP应用程序。我有在调用ajax.Is一个Java类方法的问题，可以这样做

I am creating a jsp application in Netbeans Ide. I am having problems in calling a java class method in ajax.Is it possible to do so

我的java类是这样的：

My java class is something like this:

public class Hello
{
    public String execute(String s)
    {
        return "success";
    }
}

我无法弄清楚如何调用使用Ajax execute方法： 我现在的阿贾克斯code是：

I am not able to figure out how to call the execute method using ajax : My current ajax code is:

var val="test string";
$.ajax({
type: "GET",
url: "http://localhost:8084/Shade/src/java/mail/Main.execute",
data: val,

async: true,
cache: false,
success: function (msg) {

alert("hi");
$(".col-1").html(msg);
});

感谢名单提前：）

Thanx in advance :)

推荐答案

AJAX 的缩写异步JavaScript和XML 。它提供了一个与服务器异步通信的能力。

AJAX is an acronym for Asynchronous JavaScript And XML. It provides an ability to communicate with the server asynchronously.

要解释，简单来说，你可以发送一个请求到服务器，并继续与用户的用户交互。你不必等待服务器的响应。一旦响应到达，在UI指定区域将自动更新，反映了响应信息。整个页面无需重新加载。

To explain that in simple terms, you can send a request to server and continue user interaction with the user. You need not wait for response from the server. Once the response arrives, a designated area in UI will update itself and reflect the response information. Whole page need not be reloaded.

所以，你不能直接访问Java类网​​址来使你的Ajax请求。它不应该任何映射的URL像 JSP ， Servlet的， PHP 等等。

So, you can not access Java Class directly as url to make your Ajax request. It should any mapped url like JSP, Servlets, PHP etc.

创建一个JSP（例如的hello.jsp ）

Create a JSP (e.g. hello.jsp)

<%
String strResponse;
mail.Main objMain = new mail.Main();
strResponse = objMain.execute();
%>

<%=strResponse %>

在Ajax请求

url: "hello.jsp",

编辑：添加例子：

Added Example:

<script type="text/javascript" src="js/jquery.min.js"></script> 
<script type="text/javascript">
  $(function(){
      function getData() {
          var dataToBeSent  = {
            uName : $("#userName").val() , //
            passwd: $("#password").val()
            }; // you can change parameter name

          $.ajax({
                url : 'getDataServlet', // Your Servlet mapping or JSP(not suggested)
                data :dataToBeSent, 
                type : 'POST',
                dataType : 'html', // Returns HTML as plain text; included script tags are evaluated when inserted in the DOM.
                success : function(response) {
                    $('#outputDiv').html(response); // create an empty div in your page with some id
                },
                error : function(request, textStatus, errorThrown) {
                    alert(errorThrown);
                }
            });
      }

});

在的Servlet / JSP访问您的参数的request.getParameter（UNAME）;

In Servlet/JSP access your parameters request.getParameter("uName");

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