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Login.jsp登录界面
% page contentTypetext/html;charsetUTF-8 languagejava %
html
headtitle登录界面/titlescript typetext/javascript srcjs/jquery-1.12.3.min.js/scriptscript typetext/javascript$(function () {$(#uname).blur(function () {//进行用户名的非空校验var val $(#uname).val();if(valnull||val){$(#uname_span).text(用户名不能为空).css(color,red);}else {$(#uname_span).text(用户名合法).css(color,green);}})$(#pwd).blur(function () {//进行密码的非空校验var val $(#pwd).val();if(valnull||val){$(#pwd_span).text(密码不能为空).css(color,red);}else {$(#pwd_span).text(密码合法).css(color,green);}})})/script/head
bodyh3用户登录/h3form actionDoLoginServlet methodpostp账号input typetext nameuname iduname/span iduname_span%Object msg request.getAttribute(msg);if(msg!null){out.print(msg);}%/span/pp密码input typepassword namepwd idpwdspan idpwd_span/span/ppinput typesubmit value提交//p/form/body
/htmlsuccess.jsp登录成功界面
% page contentTypetext/html;charsetUTF-8 languagejava %
html
headtitle成功登录/title
/head
bodyh1成功登录/h1/body
/htmlfa.jsp(非法登录拦截)
% page contentTypetext/html;charsetUTF-8 languagejava %
html
headtitle警告/title
/head
bodyh1滚/h1h4好好登┗|O′|┛ 嗷~~/h4h4想啥呢/h4h4滚去正常登陆去/h4
/body
/htmlDoLoginServlet.java(servlet流程控制)
package com.java.servlet;
import com.sun.net.httpserver.HttpServer;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;WebServlet(urlPatterns /DoLoginServlet)
public class DoLoginServlet extends HttpServlet {Overrideprotected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {//接收数据String uname req.getParameter(uname);String pwd req.getParameter(pwd);//服务端校验if(unamenull||.equals(uname)){req.getRequestDispatcher(fa.jsp).forward(req,resp);return;}//处理数据boolean flage false;if (sxt.equals(uname)123.equals(pwd)){flage true;}//做出响应if (flage){req.getRequestDispatcher(success.jsp).forward(req,resp);}else{req.setAttribute(msg,用户名和密码不匹配);req.getRequestDispatcher(Login.jsp).forward(req,resp);}}
}
