jsp前后台交互

最新推荐文章于 2025-04-25 21:28:25 发布

qq_35392981

最新推荐文章于 2025-04-25 21:28:25 发布

阅读量761

点赞数

CC 4.0 BY-SA版权

分类专栏： JAVA JSP JavaWeb 文章标签： JavaWeb

本文链接：https://blog.youkuaiyun.com/qq_35392981/article/details/86526925

JAVA 同时被 3 个专栏收录

7 篇文章

订阅专栏

JSP

1 篇文章

订阅专栏

JavaWeb

1 篇文章

订阅专栏

前台index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
	String path = request.getContextPath();
	String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
			+ path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
</head>

<body>
	<form action="TestServlet">
		<input type="text" id="name" value="wsw" /> <input type="submit"
			value="提交">
	</form>
</body>
</html>

后台action.mainAction.java

package action;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class mainAction extends HttpServlet{
	
	@Override
	public void service(HttpServletRequest request, HttpServletResponse response) throws IOException
	{
		response.setCharacterEncoding("UTF-8"); 
		String userName = (String)request.getAttribute("userName");
		PrintWriter reWriter = response.getWriter();
		if("wsw".equals(userName)){
			reWriter.write("用户正确！");
		}else{
			reWriter.write("用户错误！");
		}
		reWriter.flush();
		reWriter.close();
	}
}

配置文件web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>xinyu521520</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <servlet-name>TestServlet</servlet-name>
    <servlet-class>action.mainAction</servlet-class>
  </servlet>
  <servlet-mapping>
  	<servlet-name>TestServlet</servlet-name>
    <url-pattern>/TestServlet</url-pattern>
  </servlet-mapping>
</web-app>