It contains two jsp files, namely login.jsp and index.jsp
The code is as follows:
login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>登录界面</title> </head> <body> <form action="index.jsp" method="post"> 用户名:<input type="text" name="name"/> <input type="submit" value="提交"/> </form> </body> </html>
index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>欢迎您</title> </head> <body> <% String name = request.getParameter("name"); if(name != null && !name.trim().equals("")){ Cookie cookie = new Cookie("name",name); cookie.setMaxAge(30); //设置cookie有效期为30s response.addCookie(cookie); }else{ Cookie[] cookies = request.getCookies(); if(cookies != null && cookies.length > 0){ for(Cookie cookie:cookies){ String cookieName = cookie.getName(); if("name".equals(cookieName)){ String val = cookie.getValue(); name = val; } } } } if(name != null && !name.trim().equals("")){ out.print("hello: " + name); }else{//否则重定向到登录界面 response.sendRedirect("login.jsp"); } %> </body> </html>
The above is the JavaWeb use of cookies introduced by the editor I simulate the automatic login function. I hope it will be helpful to everyone. If you have any questions, please leave me a message and the editor will reply to you in time. I would also like to thank you all for your support of the PHP Chinese website!
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