ahmad.mo74
پنج شنبه 27 آذر 1393, 21:59 عصر
این دیگه چیزیه که به جاوا ربطی نداره با javascript میتونی اینکارو بکنی :
Login :
package com.sample.controller;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* @author avb
*/
public class Login extends HttpServlet {
@Override
protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//...
if (loginFailed) {
resp.sendRedirect("login.jsp?err=true");
}
}
}
login.jsp :
<%--
@author avb
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title></title>
</head>
<body>
<form action="login.do">
<div>
<label>
<input type="text" name="username">
</label>
<br/>
<br/>
<label>
<input type="password" name="password" autocomplete="off">
</label>
<br/>
<br/>
<%
String err = request.getParameter("err");
if (err != null && err.equals("true")) {
%>
<span id="login_error" style="color: red"> Nope, try again!</span>
<br/>
<script>
setTimeout(function () {
document.getElementById("login_error").innerHTML = "";
}, 5000);
</script>
<%
}
%>
<input type="submit" value="Login">
</div>
</form>
</body>
</html>
web.xml :
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<servlet>
<servlet-name>login</servlet-name>
<servlet-class>com.sample.controller.Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>login</servlet-name>
<url-pattern>/login.do</url-pattern>
</servlet-mapping>
</web-app>