1.自定义Servlet
package com.zhan;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class FileServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String username = req.getParameter("username");//接收参数
System.out.println(username);//验证是否接收成功
req.getRequestDispatcher("success.jsp").forward(req,resp);//转发页面
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doGet(req, resp);
}
}2.编写前端页面（JSP）
<%@page contentType="text/html; charset=UTF-8" language="java" %>
<html>
<head>
<title>
$Title$
</title>
</head>
<body>
<h2>
<form action="FileServlet" method="post">
<input type="text" name="username" id="username">
<input type="submit">
</form>
</h2>
</body>
</html>注意action中填写的应该是第一步自定义的FileServlet，表示提交该页面的数据到此Servlet中
3.在web.xml中配置FileServlet
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>FileServlet</servlet-name>
<servlet-class>com.zhan.FileServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>FileServlet</servlet-name>
<url-pattern>/FileServlet</url-pattern>
</servlet-mapping>
</web-app>
4.结果
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