Java 将值从一个 JSP 页面传递到另一个 JSP 页面并从第一个 JSP 获取响应数据
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Pass value from one JSP page to another JSP page and get response data back from First JSP
提问by AKIWEB
Below is my first.jspfrom which I am supposed to call second.jsppage using AJAX... And I need to pass a value from first.jsppage to second.jsppage.
下面是我first.jsp应该second.jsp使用 AJAX调用页面的我......而且我需要在first.jsp页面之间传递一个值second.jsp。
And then in the second.jsppage use that variable value and make a SELECT query using that and return the data back to first.jsp page
然后在second.jsp页面中使用该变量值并使用该值进行 SELECT 查询并将数据返回给first.jsp page
Below is my first.jsp page
下面是我的 first.jsp page
<html>
<head>
</head>
<body>
<p><input type="radio" name="dish" value="Indian" id="radioButton"> Continental</input></p>
<p><label for="male" id="columnData">Male</label></p>
<script>
$(document).ready(function() {
$('#radioButton').click(function() {
alert($('#columnData').html());
var name = $('#columnData').html();
$.ajax({
type:"POST",
url: "second.jsp",
data:"name=" +name,
success: function(success) {
}
});
});
});
</script>
</body>
</html>
Below is my second.jsp pagein which I need to retrieve the value from first.jspand make a select query and return the result back..
下面是我second.jsp page需要从中检索值first.jsp并进行选择查询并将结果返回的我。
<html>
<head>
<title>SELECT Operation</title>
</head>
<body>
<sql:setDataSource var="snapshot" driver="org.postgresql.Driver"
url="jdbc:postgresql://localhost/postDB"
user="postgres" password="hello"/>
<sql:query dataSource="${snapshot}" var="result">
// use the name variable value here passed from first.jsp page?
SELECT * from Employees where name = ?;
</sql:query>
</body>
</html>
I am not sure how to pass the value from one JSP page to another JSP page and then return back the result from second.jsp page to first.jsp page?
我不确定如何将值从一个 JSP 页面传递到另一个 JSP 页面，然后将结果从 second.jsp 页面返回到 first.jsp 页面？
采纳答案by Justin Iurman
In your first.jsp file, try using $.post instead (more appropriate).
在您的 first.jsp 文件中，尝试使用 $.post 代替（更合适）。
$.post("second.jsp", {'name': name},
function(data)
{
alert("Result from second.jsp: " + data.name + " " + data.type);
}
);
In your second.jsp file, you can now get "name" variable like this
在您的 second.jsp 文件中，您现在可以像这样获得“名称”变量
request.getParameter("name")
Then, do your query and return the result
然后，执行查询并返回结果
<%@page import="org.json.simple.JSONObject"%>
<%
if (request.getParameter("name") != null)
{
response.setContentType("application/json");
... your select query ...
JSONObject json = new JSONObject();
... put your sql data like this ...
json.put("name", "hello");
json.put("type", "world");
response.getWriter().write(json.toString());
}
%>
回答by BrianC
So you have created your client side interfaces, have you created the server side logic to process those pages?
所以您已经创建了客户端接口，是否创建了服务器端逻辑来处理这些页面？
You have to have server side logic to receive the page requests and respond with your JSP pages. As well as to respond you AJAX calls. You will need to create Servlets, or setup one of the web app frameworks like Spring WebMVC, JSF, Struts, etc.
您必须具有服务器端逻辑来接收页面请求并使用 JSP 页面进行响应。以及响应您的 AJAX 调用。您将需要创建 Servlet，或设置 Web 应用程序框架之一，如 Spring WebMVC、JSF、Struts 等。
