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jsp和servlet之间传数据
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一、jsp与java文件传递数据可以使用Servlet类来传递，jsp将数据存入到request对象中，Servlet类获取这个request对象，并将数据取出。
示例代码如下：
JSP代码：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<
html
>
<
head
>
<
title
>Demo</
title
>
</
head
>
<
body
>
<
form
action
=
"/demoServlet"
method
=
"post"
>
<
input
type
=
"text"
name
=
"name"
/>
<
input
type
=
"submit"
value
=
"提交"
/>
</
form
>
</
body
>
</
html
>
|
Servlet代码：
public
class
DemoServlet
extends
HttpServlet {
public
void
doGet(HttpServletRequest request, HttpServletResponse response)
throws
ServletException, IOException {
String name = request.getParameter(
"name"
);
//获取jsp页面输入的参数
System.out.println(name);
}
public
void
doPost(HttpServletRequest request, HttpServletResponse response)
throws
ServletException, IOException {
doGet(request, response);
}
}
|
表单提交之后，调用Servlet类的方法，通过request对象获取jsp页面传入的参数值，实现数据的传递。
二、jsp接收servlet传过来的数据
=request.getAttribute("a")
